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Clang 18.1.0-rc / trunk crash when generating code with coverage information - `detail::isPresent(Val) && "dyn_cast on a non-existent value"' failed #79957

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jeremiahar opened this issue Jan 30, 2024 · 3 comments
Closed

Clang 18.1.0-rc / trunk crash when generating code with coverage information - `detail::isPresent(Val) && "dyn_cast on a non-existent value"' failed #79957

jeremiahar opened this issue Jan 30, 2024 · 3 comments
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clang:codegen coverage crash Prefer [crash-on-valid] or [crash-on-invalid]

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@jeremiahar
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jeremiahar commented Jan 30, 2024 •
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The following code crashes clang when compiled with code coverage enabled:

typedef void (*FunctionType)();

template <FunctionType table[]>
void Dispatch()
{
 table[1]();
}

void Handler()
{

}

FunctionType Funcs[2] = {
 &Dispatch<Funcs>,
 &Handler
};

void Foo()
{
 Funcs[0]();
}

Compiled with:

clang++-18 -std=c++17 -fprofile-instr-generate -fcoverage-mapping -c main.cpp

Clang 18.1.0 version:

root@90719c8e4fca:/test# clang++-18 -v
Debian clang version 18.1.0 (++20240129063153+3df71e5a3f5d-1~exp1~20240129183258.13)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/12
Selected GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/12
Candidate multilib: .;@m64
Selected multilib: .;@m64

Backtrace from clang 18.1.0:

root@90719c8e4fca:/test# clang++-18 -std=c++17 -fprofile-instr-generate -fcoverage-mapping -c main.cpp
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.      Program arguments: clang++-18 -std=c++17 -fprofile-instr-generate -fcoverage-mapping -c main.cpp
1.      <eof> parser at end of file
2.      Per-file LLVM IR generation
3.      main.cpp:5:6: Generating code for declaration 'Dispatch'
 #0 0x000071b570df2bd6 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/usr/lib/llvm-18/bin/../lib/libLLVM-18.so.1+0xd90bd6)
 #1 0x000071b570df0c00 llvm::sys::RunSignalHandlers() (/usr/lib/llvm-18/bin/../lib/libLLVM-18.so.1+0xd8ec00)
 #2 0x000071b570d3ce40 (/usr/lib/llvm-18/bin/../lib/libLLVM-18.so.1+0xcdae40)
 #3 0x000071b56fb9afd0 (/lib/x86_64-linux-gnu/libc.so.6+0x3bfd0)
 #4 0x000071b57967fff7 getStmtClass build-llvm/tools/clang/stage2-bins/clang/include/clang/AST/Stmt.h:1357:44
 #5 0x000071b57967fff7 classof build-llvm/tools/clang/stage2-bins/clang/include/clang/AST/Expr.h:3980:15
 #6 0x000071b57967fff7 doit build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/Casting.h:64:53
 #7 0x000071b57967fff7 doit build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/Casting.h:110:12
 #8 0x000071b57967fff7 doit build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/Casting.h:137:12
 #9 0x000071b57967fff7 doit build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/Casting.h:127:12
#10 0x000071b57967fff7 isPossible build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/Casting.h:255:12
#11 0x000071b57967fff7 doCastIfPossible build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/Casting.h:493:10
#12 0x000071b57967fff7 dyn_cast<clang::BinaryOperator, const clang::Stmt> build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/Casting.h:663:10
#13 0x000071b57967fff7 Visit build-llvm/tools/clang/stage2-bins/clang/include/clang/AST/StmtVisitor.h:47:37
#14 0x000071b5796858a2 VisitStmt build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CoverageMappingGen.cpp:0:0
#15 0x000071b5796858a2 VisitStmt build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CoverageMappingGen.cpp:0:0
#16 0x000071b5796858a2 VisitStmt build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CoverageMappingGen.cpp:0:0
#17 0x000071b5796858a2 VisitStmt build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CoverageMappingGen.cpp:0:0
#18 0x000071b5796858a2 VisitStmt build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CoverageMappingGen.cpp:0:0
#19 0x000071b5796812d0 getTrailingStmts build-llvm/tools/clang/stage2-bins/clang/include/clang/AST/Expr.h:2832:51
#20 0x000071b5796812d0 getTrailingStmts build-llvm/tools/clang/stage2-bins/clang/include/clang/AST/Expr.h:2835:42
#21 0x000071b5796812d0 getCallee build-llvm/tools/clang/stage2-bins/clang/include/clang/AST/Expr.h:2947:53
#22 0x000071b5796812d0 VisitCallExpr build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CoverageMappingGen.cpp:1481:30
#23 0x000071b5796858a2 VisitStmt build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CoverageMappingGen.cpp:0:0
#24 0x000071b57967fe33 begin build-llvm/tools/clang/stage2-bins/llvm/include/llvm/ADT/SmallVector.h:280:45
#25 0x000071b57967fe33 end build-llvm/tools/clang/stage2-bins/llvm/include/llvm/ADT/SmallVector.h:282:27
#26 0x000071b57967fe33 back build-llvm/tools/clang/stage2-bins/llvm/include/llvm/ADT/SmallVector.h:323:12
#27 0x000071b57967fe33 getRegion build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CoverageMappingGen.cpp:998:24
#28 0x000071b57967fe33 propagateCounts build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CoverageMappingGen.cpp:1010:25
#29 0x000071b57967e591 clang::CodeGen::CoverageMappingGen::emitCounterMapping(clang::Decl const*, llvm::raw_ostream&) build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CoverageMappingGen.cpp:0:0
#30 0x000071b57964f025 flush build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/raw_ostream.h:186:9
#31 0x000071b57964f025 clang::CodeGen::CodeGenPGO::emitCounterRegionMapping(clang::Decl const*) build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CodeGenPGO.cpp:1042:6
#32 0x000071b57964eba2 clang::CodeGen::CodeGenPGO::assignRegionCounters(clang::GlobalDecl, llvm::Function*) build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CodeGenPGO.cpp:0:5
#33 0x000071b5795f89ed getKind build-llvm/tools/clang/stage2-bins/clang/include/clang/AST/DeclBase.h:447:51
#34 0x000071b5795f89ed classof build-llvm/tools/clang/stage2-bins/clang/include/clang/AST/DeclCXX.h:2841:62
#35 0x000071b5795f89ed doit build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/Casting.h:64:53
#36 0x000071b5795f89ed doit build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/Casting.h:110:12
#37 0x000071b5795f89ed doit build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/Casting.h:137:12
#38 0x000071b5795f89ed doit build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/Casting.h:127:12
#39 0x000071b5795f89ed isPossible build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/Casting.h:255:12
#40 0x000071b5795f89ed isPossible build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/Casting.h:509:12
#41 0x000071b5795f89ed isa<clang::CXXDestructorDecl, const clang::FunctionDecl *> build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/Casting.h:549:10
#42 0x000071b5795f89ed clang::CodeGen::CodeGenFunction::GenerateCode(clang::GlobalDecl, llvm::Function*, clang::CodeGen::CGFunctionInfo const&) build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CodeGenFunction.cpp:1449:7
#43 0x000071b579619935 clang::CodeGen::CodeGenModule::EmitGlobalFunctionDefinition(clang::GlobalDecl, llvm::GlobalValue*) build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CodeGenModule.cpp:5834:3
#44 0x000071b5796131fb clang::CodeGen::CodeGenModule::EmitGlobalDefinition(clang::GlobalDecl, llvm::GlobalValue*) build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CodeGenModule.cpp:0:12
#45 0x000071b579606613 __normal_iterator /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/bits/stl_iterator.h:1073:20
#46 0x000071b579606613 begin /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/bits/stl_vector.h:879:16
#47 0x000071b579606613 empty /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/bits/stl_vector.h:1084:16
#48 0x000071b579606613 clang::CodeGen::CodeGenModule::EmitDeferred() build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CodeGenModule.cpp:3192:26
#49 0x000071b57960428b empty build-llvm/tools/clang/stage2-bins/llvm/include/llvm/ADT/DenseMap.h:98:61
#50 0x000071b57960428b begin build-llvm/tools/clang/stage2-bins/llvm/include/llvm/ADT/DenseMap.h:78:9
#51 0x000071b57960428b clang::CodeGen::CodeGenModule::Release() build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CodeGenModule.cpp:807:45
#52 0x000071b5796b0d98 HandleTranslationUnit build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/ModuleBuilder.cpp:291:11
#53 0x000071b5795e9240 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CodeGenAction.cpp:306:9
#54 0x000071b57821a846 __normal_iterator /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/bits/stl_iterator.h:1073:20
#55 0x000071b57821a846 begin /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/bits/stl_vector.h:869:16
#56 0x000071b57821a846 finalize<std::vector<std::unique_ptr<clang::TemplateInstantiationCallback, std::default_delete<clang::TemplateInstantiationCallback> >, std::allocator<std::unique_ptr<clang::TemplateInstantiationCallback, std::default_delete<clang::TemplateInstantiationCallback> > > > > build-llvm/tools/clang/stage2-bins/clang/include/clang/Sema/TemplateInstCallback.h:54:16
#57 0x000071b57821a846 clang::ParseAST(clang::Sema&, bool, bool) build-llvm/tools/clang/stage2-bins/clang/lib/Parse/ParseAST.cpp:183:3
#58 0x000071b57a049025 clang::FrontendAction::Execute() build-llvm/tools/clang/stage2-bins/clang/lib/Frontend/FrontendAction.cpp:1073:10
#59 0x000071b579fbfef4 getPtr build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/Error.h:279:12
#60 0x000071b579fbfef4 operator bool build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/Error.h:239:16
#61 0x000071b579fbfef4 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) build-llvm/tools/clang/stage2-bins/clang/lib/Frontend/CompilerInstance.cpp:1057:23
#62 0x000071b57a0c401e clang::ExecuteCompilerInvocation(clang::CompilerInstance*) build-llvm/tools/clang/stage2-bins/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:272:25
#63 0x000064712c40fe0a cc1_main(llvm::ArrayRef<char const*>, char const*, void*) build-llvm/tools/clang/stage2-bins/clang/tools/driver/cc1_main.cpp:294:15
#64 0x000064712c40d195 ExecuteCC1Tool build-llvm/tools/clang/stage2-bins/clang/tools/driver/driver.cpp:365:12
#65 0x000071b579c79e99 operator() build-llvm/tools/clang/stage2-bins/clang/lib/Driver/Job.cpp:440:30
#66 0x000071b579c79e99 callback_fn<(lambda at clang/lib/Driver/Job.cpp:440:22)> build-llvm/tools/clang/stage2-bins/llvm/include/llvm/ADT/STLFunctionalExtras.h:45:12
#67 0x000071b570d3cbdc llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/usr/lib/llvm-18/bin/../lib/libLLVM-18.so.1+0xcdabdc)
#68 0x000071b579c7981e clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const build-llvm/tools/clang/stage2-bins/clang/lib/Driver/Job.cpp:440:7
#69 0x000071b579c41a11 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const build-llvm/tools/clang/stage2-bins/clang/lib/Driver/Compilation.cpp:199:15
#70 0x000071b579c41c5e clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const build-llvm/tools/clang/stage2-bins/clang/lib/Driver/Compilation.cpp:253:13
#71 0x000071b579c5e29d empty build-llvm/tools/clang/stage2-bins/llvm/include/llvm/ADT/SmallVector.h:94:46
#72 0x000071b579c5e29d clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) build-llvm/tools/clang/stage2-bins/clang/lib/Driver/Driver.cpp:1921:23
#73 0x000064712c40cb04 clang_main(int, char**, llvm::ToolContext const&) build-llvm/tools/clang/stage2-bins/clang/tools/driver/driver.cpp:540:21
#74 0x000064712c419f16 main build-llvm/tools/clang/stage2-bins/build-llvm/tools/clang/stage2-bins/tools/clang/tools/driver/clang-driver.cpp:17:10
#75 0x000071b56fb861ca (/lib/x86_64-linux-gnu/libc.so.6+0x271ca)
#76 0x000071b56fb86285 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x27285)
#77 0x000064712c409bc1 _start (/usr/lib/llvm-18/bin/clang+0xcbc1)
clang++-18: error: clang frontend command failed with exit code 139 (use -v to see invocation)
Debian clang version 18.1.0 (++20240129063153+3df71e5a3f5d-1~exp1~20240129183258.13)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
clang++-18: note: diagnostic msg: 
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang++-18: note: diagnostic msg: /tmp/main-469ae6.cpp
clang++-18: note: diagnostic msg: /tmp/main-469ae6.sh
clang++-18: note: diagnostic msg: 

********************

Clang trunk (assertions enabled) Godbolt link:
https://godbolt.org/z/8T5GqcfTs

Backtrace from clang trunk:

clang++: /root/llvm-project/llvm/include/llvm/Support/Casting.h:662: decltype(auto) llvm::dyn_cast(From*) [with To = clang::BinaryOperator; From = const clang::Stmt]: Assertion `detail::isPresent(Val) && "dyn_cast on a non-existent value"' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.	Program arguments: /opt/compiler-explorer/clang-assertions-trunk/bin/clang++ -gdwarf-4 -g -o /app/output.s -mllvm --x86-asm-syntax=intel -S --gcc-toolchain=/opt/compiler-explorer/gcc-snapshot -fcolor-diagnostics -fno-crash-diagnostics -std=c++17 -fprofile-instr-generate -fcoverage-mapping <source>
1.	<eof> parser at end of file
2.	Per-file LLVM IR generation
3.	<source>:4:6: Generating code for declaration 'Dispatch'
 #0 0x0000000003878878 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3878878)
 #1 0x000000000387655c llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x387655c)
 #2 0x00000000037bf4c8 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #3 0x00007f4ea9442520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x00007f4ea94969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
 #5 0x00007f4ea9442476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #6 0x00007f4ea94287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #7 0x00007f4ea942871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
 #8 0x00007f4ea9439e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
 #9 0x0000000003cd17c9 clang::StmtVisitorBase<llvm::make_const_ptr, (anonymous namespace)::CounterCoverageMappingBuilder, void>::Visit(clang::Stmt const*) CoverageMappingGen.cpp:0:0
#10 0x0000000003cd3a43 (anonymous namespace)::CounterCoverageMappingBuilder::VisitStmt(clang::Stmt const*) CoverageMappingGen.cpp:0:0
#11 0x0000000003cd19e4 clang::StmtVisitorBase<llvm::make_const_ptr, (anonymous namespace)::CounterCoverageMappingBuilder, void>::Visit(clang::Stmt const*) CoverageMappingGen.cpp:0:0
#12 0x0000000003cd3a43 (anonymous namespace)::CounterCoverageMappingBuilder::VisitStmt(clang::Stmt const*) CoverageMappingGen.cpp:0:0
#13 0x0000000003cd1697 clang::StmtVisitorBase<llvm::make_const_ptr, (anonymous namespace)::CounterCoverageMappingBuilder, void>::Visit(clang::Stmt const*) CoverageMappingGen.cpp:0:0
#14 0x0000000003cd3a43 (anonymous namespace)::CounterCoverageMappingBuilder::VisitStmt(clang::Stmt const*) CoverageMappingGen.cpp:0:0
#15 0x0000000003cd1db4 clang::StmtVisitorBase<llvm::make_const_ptr, (anonymous namespace)::CounterCoverageMappingBuilder, void>::Visit(clang::Stmt const*) CoverageMappingGen.cpp:0:0
#16 0x0000000003cd3a43 (anonymous namespace)::CounterCoverageMappingBuilder::VisitStmt(clang::Stmt const*) CoverageMappingGen.cpp:0:0
#17 0x0000000003cd1af4 clang::StmtVisitorBase<llvm::make_const_ptr, (anonymous namespace)::CounterCoverageMappingBuilder, void>::Visit(clang::Stmt const*) CoverageMappingGen.cpp:0:0
#18 0x0000000003cd3a43 (anonymous namespace)::CounterCoverageMappingBuilder::VisitStmt(clang::Stmt const*) CoverageMappingGen.cpp:0:0
#19 0x0000000003cd3b72 (anonymous namespace)::CounterCoverageMappingBuilder::VisitCallExpr(clang::CallExpr const*) CoverageMappingGen.cpp:0:0
#20 0x0000000003cd1b94 clang::StmtVisitorBase<llvm::make_const_ptr, (anonymous namespace)::CounterCoverageMappingBuilder, void>::Visit(clang::Stmt const*) CoverageMappingGen.cpp:0:0
#21 0x0000000003cd3a43 (anonymous namespace)::CounterCoverageMappingBuilder::VisitStmt(clang::Stmt const*) CoverageMappingGen.cpp:0:0
#22 0x0000000003cd29c8 clang::StmtVisitorBase<llvm::make_const_ptr, (anonymous namespace)::CounterCoverageMappingBuilder, void>::Visit(clang::Stmt const*) CoverageMappingGen.cpp:0:0
#23 0x0000000003cd89ab clang::CodeGen::CoverageMappingGen::emitCounterMapping(clang::Decl const*, llvm::raw_ostream&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3cd89ab)
#24 0x0000000003c85b50 clang::CodeGen::CodeGenPGO::emitCounterRegionMapping(clang::Decl const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3c85b50)
#25 0x0000000003cb8f1b clang::CodeGen::CodeGenPGO::assignRegionCounters(clang::GlobalDecl, llvm::Function*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3cb8f1b)
#26 0x0000000003c154d3 clang::CodeGen::CodeGenFunction::GenerateCode(clang::GlobalDecl, llvm::Function*, clang::CodeGen::CGFunctionInfo const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3c154d3)
#27 0x0000000003c78412 clang::CodeGen::CodeGenModule::EmitGlobalFunctionDefinition(clang::GlobalDecl, llvm::GlobalValue*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3c78412)
#28 0x0000000003c72d15 clang::CodeGen::CodeGenModule::EmitGlobalDefinition(clang::GlobalDecl, llvm::GlobalValue*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3c72d15)
#29 0x0000000003c7e3fd clang::CodeGen::CodeGenModule::EmitDeferred() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3c7e3fd)
#30 0x0000000003c811d3 clang::CodeGen::CodeGenModule::Release() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3c811d3)
#31 0x0000000004104ada (anonymous namespace)::CodeGeneratorImpl::HandleTranslationUnit(clang::ASTContext&) ModuleBuilder.cpp:0:0
#32 0x00000000041035fd clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x41035fd)
#33 0x00000000060a4979 clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x60a4979)
#34 0x0000000004102eb8 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4102eb8)
#35 0x0000000004371739 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4371739)
#36 0x00000000042f139e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x42f139e)
#37 0x0000000004451e1e clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4451e1e)
#38 0x0000000000c13226 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc13226)
#39 0x0000000000c0aa6a ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#40 0x00000000041443f9 void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const::'lambda'()>(long) Job.cpp:0:0
#41 0x00000000037bf974 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x37bf974)
#42 0x00000000041449ef clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const (.part.0) Job.cpp:0:0
#43 0x000000000410c755 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x410c755)
#44 0x000000000410d1bd clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x410d1bd)
#45 0x00000000041150f5 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x41150f5)
#46 0x0000000000c105dc clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc105dc)
#47 0x0000000000b07a74 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xb07a74)
#48 0x00007f4ea9429d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#49 0x00007f4ea9429e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#50 0x0000000000c0a54e _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc0a54e)
clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation)
Compiler returned: 134

The test case is reduced from Highway's dispatch code https://github.com/google/highway/blob/cc0a171fb9bf8af5e8904b77259ce4ca5461172b/hwy/highway.h#L379 .
@github-actions github-actions bot added the clang Clang issues not falling into any other category label Jan 30, 2024
@EugeneZelenko EugeneZelenko added clang:codegen coverage crash Prefer [crash-on-valid] or [crash-on-invalid] and removed clang Clang issues not falling into any other category labels Jan 30, 2024
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llvmbot commented Jan 30, 2024

@llvm/issue-subscribers-clang-codegen

Author: Jeremiah Rodriguez (jeremiahar)

The following code crashes clang when compiled with code coverage enabled: 
typedef void (*FunctionType)();

template &lt;FunctionType table[]&gt;
void Dispatch()
{
 table[1]();
}

void Handler()
{

}

FunctionType Funcs[2] = {
 &amp;Dispatch&lt;Funcs&gt;,
 &amp;Handler
};

void Foo()
{
 Funcs[0]();
}

Compiled with:

clang++-18 -std=c++17 -fprofile-instr-generate -fcoverage-mapping -c main.cpp

Clang 18.1.0 version:

root@<!-- -->90719c8e4fca:/test# clang++-18 -v
Debian clang version 18.1.0 (++20240129063153+3df71e5a3f5d-1~exp1~20240129183258.13)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/12
Selected GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/12
Candidate multilib: .;@<!-- -->m64
Selected multilib: .;@<!-- -->m64

Backtrace from clang 18.1.0:

root@<!-- -->90719c8e4fca:/test# clang++-18 -std=c++17 -fprofile-instr-generate -fcoverage-mapping -c main.cpp
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.      Program arguments: clang++-18 -std=c++17 -fprofile-instr-generate -fcoverage-mapping -c main.cpp
1.      &lt;eof&gt; parser at end of file
2.      Per-file LLVM IR generation
3.      main.cpp:5:6: Generating code for declaration 'Dispatch'
 #<!-- -->0 0x000071b570df2bd6 llvm::sys::PrintStackTrace(llvm::raw_ostream&amp;, int) (/usr/lib/llvm-18/bin/../lib/libLLVM-18.so.1+0xd90bd6)
 #<!-- -->1 0x000071b570df0c00 llvm::sys::RunSignalHandlers() (/usr/lib/llvm-18/bin/../lib/libLLVM-18.so.1+0xd8ec00)
 #<!-- -->2 0x000071b570d3ce40 (/usr/lib/llvm-18/bin/../lib/libLLVM-18.so.1+0xcdae40)
 #<!-- -->3 0x000071b56fb9afd0 (/lib/x86_64-linux-gnu/libc.so.6+0x3bfd0)
 #<!-- -->4 0x000071b57967fff7 getStmtClass build-llvm/tools/clang/stage2-bins/clang/include/clang/AST/Stmt.h:1357:44
 #<!-- -->5 0x000071b57967fff7 classof build-llvm/tools/clang/stage2-bins/clang/include/clang/AST/Expr.h:3980:15
 #<!-- -->6 0x000071b57967fff7 doit build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/Casting.h:64:53
 #<!-- -->7 0x000071b57967fff7 doit build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/Casting.h:110:12
 #<!-- -->8 0x000071b57967fff7 doit build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/Casting.h:137:12
 #<!-- -->9 0x000071b57967fff7 doit build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/Casting.h:127:12
#<!-- -->10 0x000071b57967fff7 isPossible build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/Casting.h:255:12
#<!-- -->11 0x000071b57967fff7 doCastIfPossible build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/Casting.h:493:10
#<!-- -->12 0x000071b57967fff7 dyn_cast&lt;clang::BinaryOperator, const clang::Stmt&gt; build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/Casting.h:663:10
#<!-- -->13 0x000071b57967fff7 Visit build-llvm/tools/clang/stage2-bins/clang/include/clang/AST/StmtVisitor.h:47:37
#<!-- -->14 0x000071b5796858a2 VisitStmt build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CoverageMappingGen.cpp:0:0
#<!-- -->15 0x000071b5796858a2 VisitStmt build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CoverageMappingGen.cpp:0:0
#<!-- -->16 0x000071b5796858a2 VisitStmt build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CoverageMappingGen.cpp:0:0
#<!-- -->17 0x000071b5796858a2 VisitStmt build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CoverageMappingGen.cpp:0:0
#<!-- -->18 0x000071b5796858a2 VisitStmt build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CoverageMappingGen.cpp:0:0
#<!-- -->19 0x000071b5796812d0 getTrailingStmts build-llvm/tools/clang/stage2-bins/clang/include/clang/AST/Expr.h:2832:51
#<!-- -->20 0x000071b5796812d0 getTrailingStmts build-llvm/tools/clang/stage2-bins/clang/include/clang/AST/Expr.h:2835:42
#<!-- -->21 0x000071b5796812d0 getCallee build-llvm/tools/clang/stage2-bins/clang/include/clang/AST/Expr.h:2947:53
#<!-- -->22 0x000071b5796812d0 VisitCallExpr build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CoverageMappingGen.cpp:1481:30
#<!-- -->23 0x000071b5796858a2 VisitStmt build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CoverageMappingGen.cpp:0:0
#<!-- -->24 0x000071b57967fe33 begin build-llvm/tools/clang/stage2-bins/llvm/include/llvm/ADT/SmallVector.h:280:45
#<!-- -->25 0x000071b57967fe33 end build-llvm/tools/clang/stage2-bins/llvm/include/llvm/ADT/SmallVector.h:282:27
#<!-- -->26 0x000071b57967fe33 back build-llvm/tools/clang/stage2-bins/llvm/include/llvm/ADT/SmallVector.h:323:12
#<!-- -->27 0x000071b57967fe33 getRegion build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CoverageMappingGen.cpp:998:24
#<!-- -->28 0x000071b57967fe33 propagateCounts build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CoverageMappingGen.cpp:1010:25
#<!-- -->29 0x000071b57967e591 clang::CodeGen::CoverageMappingGen::emitCounterMapping(clang::Decl const*, llvm::raw_ostream&amp;) build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CoverageMappingGen.cpp:0:0
#<!-- -->30 0x000071b57964f025 flush build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/raw_ostream.h:186:9
#<!-- -->31 0x000071b57964f025 clang::CodeGen::CodeGenPGO::emitCounterRegionMapping(clang::Decl const*) build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CodeGenPGO.cpp:1042:6
#<!-- -->32 0x000071b57964eba2 clang::CodeGen::CodeGenPGO::assignRegionCounters(clang::GlobalDecl, llvm::Function*) build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CodeGenPGO.cpp:0:5
#<!-- -->33 0x000071b5795f89ed getKind build-llvm/tools/clang/stage2-bins/clang/include/clang/AST/DeclBase.h:447:51
#<!-- -->34 0x000071b5795f89ed classof build-llvm/tools/clang/stage2-bins/clang/include/clang/AST/DeclCXX.h:2841:62
#<!-- -->35 0x000071b5795f89ed doit build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/Casting.h:64:53
#<!-- -->36 0x000071b5795f89ed doit build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/Casting.h:110:12
#<!-- -->37 0x000071b5795f89ed doit build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/Casting.h:137:12
#<!-- -->38 0x000071b5795f89ed doit build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/Casting.h:127:12
#<!-- -->39 0x000071b5795f89ed isPossible build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/Casting.h:255:12
#<!-- -->40 0x000071b5795f89ed isPossible build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/Casting.h:509:12
#<!-- -->41 0x000071b5795f89ed isa&lt;clang::CXXDestructorDecl, const clang::FunctionDecl *&gt; build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/Casting.h:549:10
#<!-- -->42 0x000071b5795f89ed clang::CodeGen::CodeGenFunction::GenerateCode(clang::GlobalDecl, llvm::Function*, clang::CodeGen::CGFunctionInfo const&amp;) build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CodeGenFunction.cpp:1449:7
#<!-- -->43 0x000071b579619935 clang::CodeGen::CodeGenModule::EmitGlobalFunctionDefinition(clang::GlobalDecl, llvm::GlobalValue*) build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CodeGenModule.cpp:5834:3
#<!-- -->44 0x000071b5796131fb clang::CodeGen::CodeGenModule::EmitGlobalDefinition(clang::GlobalDecl, llvm::GlobalValue*) build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CodeGenModule.cpp:0:12
#<!-- -->45 0x000071b579606613 __normal_iterator /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/bits/stl_iterator.h:1073:20
#<!-- -->46 0x000071b579606613 begin /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/bits/stl_vector.h:879:16
#<!-- -->47 0x000071b579606613 empty /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/bits/stl_vector.h:1084:16
#<!-- -->48 0x000071b579606613 clang::CodeGen::CodeGenModule::EmitDeferred() build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CodeGenModule.cpp:3192:26
#<!-- -->49 0x000071b57960428b empty build-llvm/tools/clang/stage2-bins/llvm/include/llvm/ADT/DenseMap.h:98:61
#<!-- -->50 0x000071b57960428b begin build-llvm/tools/clang/stage2-bins/llvm/include/llvm/ADT/DenseMap.h:78:9
#<!-- -->51 0x000071b57960428b clang::CodeGen::CodeGenModule::Release() build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CodeGenModule.cpp:807:45
#<!-- -->52 0x000071b5796b0d98 HandleTranslationUnit build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/ModuleBuilder.cpp:291:11
#<!-- -->53 0x000071b5795e9240 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&amp;) build-llvm/tools/clang/stage2-bins/clang/lib/CodeGen/CodeGenAction.cpp:306:9
#<!-- -->54 0x000071b57821a846 __normal_iterator /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/bits/stl_iterator.h:1073:20
#<!-- -->55 0x000071b57821a846 begin /usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/12/bits/stl_vector.h:869:16
#<!-- -->56 0x000071b57821a846 finalize&lt;std::vector&lt;std::unique_ptr&lt;clang::TemplateInstantiationCallback, std::default_delete&lt;clang::TemplateInstantiationCallback&gt; &gt;, std::allocator&lt;std::unique_ptr&lt;clang::TemplateInstantiationCallback, std::default_delete&lt;clang::TemplateInstantiationCallback&gt; &gt; &gt; &gt; &gt; build-llvm/tools/clang/stage2-bins/clang/include/clang/Sema/TemplateInstCallback.h:54:16
#<!-- -->57 0x000071b57821a846 clang::ParseAST(clang::Sema&amp;, bool, bool) build-llvm/tools/clang/stage2-bins/clang/lib/Parse/ParseAST.cpp:183:3
#<!-- -->58 0x000071b57a049025 clang::FrontendAction::Execute() build-llvm/tools/clang/stage2-bins/clang/lib/Frontend/FrontendAction.cpp:1073:10
#<!-- -->59 0x000071b579fbfef4 getPtr build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/Error.h:279:12
#<!-- -->60 0x000071b579fbfef4 operator bool build-llvm/tools/clang/stage2-bins/llvm/include/llvm/Support/Error.h:239:16
#<!-- -->61 0x000071b579fbfef4 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&amp;) build-llvm/tools/clang/stage2-bins/clang/lib/Frontend/CompilerInstance.cpp:1057:23
#<!-- -->62 0x000071b57a0c401e clang::ExecuteCompilerInvocation(clang::CompilerInstance*) build-llvm/tools/clang/stage2-bins/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:272:25
#<!-- -->63 0x000064712c40fe0a cc1_main(llvm::ArrayRef&lt;char const*&gt;, char const*, void*) build-llvm/tools/clang/stage2-bins/clang/tools/driver/cc1_main.cpp:294:15
#<!-- -->64 0x000064712c40d195 ExecuteCC1Tool build-llvm/tools/clang/stage2-bins/clang/tools/driver/driver.cpp:365:12
#<!-- -->65 0x000071b579c79e99 operator() build-llvm/tools/clang/stage2-bins/clang/lib/Driver/Job.cpp:440:30
#<!-- -->66 0x000071b579c79e99 callback_fn&lt;(lambda at clang/lib/Driver/Job.cpp:440:22)&gt; build-llvm/tools/clang/stage2-bins/llvm/include/llvm/ADT/STLFunctionalExtras.h:45:12
#<!-- -->67 0x000071b570d3cbdc llvm::CrashRecoveryContext::RunSafely(llvm::function_ref&lt;void ()&gt;) (/usr/lib/llvm-18/bin/../lib/libLLVM-18.so.1+0xcdabdc)
#<!-- -->68 0x000071b579c7981e clang::driver::CC1Command::Execute(llvm::ArrayRef&lt;std::optional&lt;llvm::StringRef&gt;&gt;, std::__cxx11::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt;&gt;*, bool*) const build-llvm/tools/clang/stage2-bins/clang/lib/Driver/Job.cpp:440:7
#<!-- -->69 0x000071b579c41a11 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&amp;, clang::driver::Command const*&amp;, bool) const build-llvm/tools/clang/stage2-bins/clang/lib/Driver/Compilation.cpp:199:15
#<!-- -->70 0x000071b579c41c5e clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&amp;, llvm::SmallVectorImpl&lt;std::pair&lt;int, clang::driver::Command const*&gt;&gt;&amp;, bool) const build-llvm/tools/clang/stage2-bins/clang/lib/Driver/Compilation.cpp:253:13
#<!-- -->71 0x000071b579c5e29d empty build-llvm/tools/clang/stage2-bins/llvm/include/llvm/ADT/SmallVector.h:94:46
#<!-- -->72 0x000071b579c5e29d clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&amp;, llvm::SmallVectorImpl&lt;std::pair&lt;int, clang::driver::Command const*&gt;&gt;&amp;) build-llvm/tools/clang/stage2-bins/clang/lib/Driver/Driver.cpp:1921:23
#<!-- -->73 0x000064712c40cb04 clang_main(int, char**, llvm::ToolContext const&amp;) build-llvm/tools/clang/stage2-bins/clang/tools/driver/driver.cpp:540:21
#<!-- -->74 0x000064712c419f16 main build-llvm/tools/clang/stage2-bins/build-llvm/tools/clang/stage2-bins/tools/clang/tools/driver/clang-driver.cpp:17:10
#<!-- -->75 0x000071b56fb861ca (/lib/x86_64-linux-gnu/libc.so.6+0x271ca)
#<!-- -->76 0x000071b56fb86285 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x27285)
#<!-- -->77 0x000064712c409bc1 _start (/usr/lib/llvm-18/bin/clang+0xcbc1)
clang++-18: error: clang frontend command failed with exit code 139 (use -v to see invocation)
Debian clang version 18.1.0 (++20240129063153+3df71e5a3f5d-1~exp1~20240129183258.13)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
clang++-18: note: diagnostic msg: 
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang++-18: note: diagnostic msg: /tmp/main-469ae6.cpp
clang++-18: note: diagnostic msg: /tmp/main-469ae6.sh
clang++-18: note: diagnostic msg: 

********************

Clang trunk (assertions enabled) Godbolt link:
https://godbolt.org/z/8T5GqcfTs

Backtrace from clang trunk:

clang++: /root/llvm-project/llvm/include/llvm/Support/Casting.h:662: decltype(auto) llvm::dyn_cast(From*) [with To = clang::BinaryOperator; From = const clang::Stmt]: Assertion `detail::isPresent(Val) &amp;&amp; "dyn_cast on a non-existent value"' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.	Program arguments: /opt/compiler-explorer/clang-assertions-trunk/bin/clang++ -gdwarf-4 -g -o /app/output.s -mllvm --x86-asm-syntax=intel -S --gcc-toolchain=/opt/compiler-explorer/gcc-snapshot -fcolor-diagnostics -fno-crash-diagnostics -std=c++17 -fprofile-instr-generate -fcoverage-mapping &lt;source&gt;
1.	&lt;eof&gt; parser at end of file
2.	Per-file LLVM IR generation
3.	&lt;source&gt;:4:6: Generating code for declaration 'Dispatch'
 #<!-- -->0 0x0000000003878878 llvm::sys::PrintStackTrace(llvm::raw_ostream&amp;, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3878878)
 #<!-- -->1 0x000000000387655c llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x387655c)
 #<!-- -->2 0x00000000037bf4c8 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #<!-- -->3 0x00007f4ea9442520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #<!-- -->4 0x00007f4ea94969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
 #<!-- -->5 0x00007f4ea9442476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #<!-- -->6 0x00007f4ea94287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #<!-- -->7 0x00007f4ea942871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
 #<!-- -->8 0x00007f4ea9439e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
 #<!-- -->9 0x0000000003cd17c9 clang::StmtVisitorBase&lt;llvm::make_const_ptr, (anonymous namespace)::CounterCoverageMappingBuilder, void&gt;::Visit(clang::Stmt const*) CoverageMappingGen.cpp:0:0
#<!-- -->10 0x0000000003cd3a43 (anonymous namespace)::CounterCoverageMappingBuilder::VisitStmt(clang::Stmt const*) CoverageMappingGen.cpp:0:0
#<!-- -->11 0x0000000003cd19e4 clang::StmtVisitorBase&lt;llvm::make_const_ptr, (anonymous namespace)::CounterCoverageMappingBuilder, void&gt;::Visit(clang::Stmt const*) CoverageMappingGen.cpp:0:0
#<!-- -->12 0x0000000003cd3a43 (anonymous namespace)::CounterCoverageMappingBuilder::VisitStmt(clang::Stmt const*) CoverageMappingGen.cpp:0:0
#<!-- -->13 0x0000000003cd1697 clang::StmtVisitorBase&lt;llvm::make_const_ptr, (anonymous namespace)::CounterCoverageMappingBuilder, void&gt;::Visit(clang::Stmt const*) CoverageMappingGen.cpp:0:0
#<!-- -->14 0x0000000003cd3a43 (anonymous namespace)::CounterCoverageMappingBuilder::VisitStmt(clang::Stmt const*) CoverageMappingGen.cpp:0:0
#<!-- -->15 0x0000000003cd1db4 clang::StmtVisitorBase&lt;llvm::make_const_ptr, (anonymous namespace)::CounterCoverageMappingBuilder, void&gt;::Visit(clang::Stmt const*) CoverageMappingGen.cpp:0:0
#<!-- -->16 0x0000000003cd3a43 (anonymous namespace)::CounterCoverageMappingBuilder::VisitStmt(clang::Stmt const*) CoverageMappingGen.cpp:0:0
#<!-- -->17 0x0000000003cd1af4 clang::StmtVisitorBase&lt;llvm::make_const_ptr, (anonymous namespace)::CounterCoverageMappingBuilder, void&gt;::Visit(clang::Stmt const*) CoverageMappingGen.cpp:0:0
#<!-- -->18 0x0000000003cd3a43 (anonymous namespace)::CounterCoverageMappingBuilder::VisitStmt(clang::Stmt const*) CoverageMappingGen.cpp:0:0
#<!-- -->19 0x0000000003cd3b72 (anonymous namespace)::CounterCoverageMappingBuilder::VisitCallExpr(clang::CallExpr const*) CoverageMappingGen.cpp:0:0
#<!-- -->20 0x0000000003cd1b94 clang::StmtVisitorBase&lt;llvm::make_const_ptr, (anonymous namespace)::CounterCoverageMappingBuilder, void&gt;::Visit(clang::Stmt const*) CoverageMappingGen.cpp:0:0
#<!-- -->21 0x0000000003cd3a43 (anonymous namespace)::CounterCoverageMappingBuilder::VisitStmt(clang::Stmt const*) CoverageMappingGen.cpp:0:0
#<!-- -->22 0x0000000003cd29c8 clang::StmtVisitorBase&lt;llvm::make_const_ptr, (anonymous namespace)::CounterCoverageMappingBuilder, void&gt;::Visit(clang::Stmt const*) CoverageMappingGen.cpp:0:0
#<!-- -->23 0x0000000003cd89ab clang::CodeGen::CoverageMappingGen::emitCounterMapping(clang::Decl const*, llvm::raw_ostream&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3cd89ab)
#<!-- -->24 0x0000000003c85b50 clang::CodeGen::CodeGenPGO::emitCounterRegionMapping(clang::Decl const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3c85b50)
#<!-- -->25 0x0000000003cb8f1b clang::CodeGen::CodeGenPGO::assignRegionCounters(clang::GlobalDecl, llvm::Function*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3cb8f1b)
#<!-- -->26 0x0000000003c154d3 clang::CodeGen::CodeGenFunction::GenerateCode(clang::GlobalDecl, llvm::Function*, clang::CodeGen::CGFunctionInfo const&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3c154d3)
#<!-- -->27 0x0000000003c78412 clang::CodeGen::CodeGenModule::EmitGlobalFunctionDefinition(clang::GlobalDecl, llvm::GlobalValue*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3c78412)
#<!-- -->28 0x0000000003c72d15 clang::CodeGen::CodeGenModule::EmitGlobalDefinition(clang::GlobalDecl, llvm::GlobalValue*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3c72d15)
#<!-- -->29 0x0000000003c7e3fd clang::CodeGen::CodeGenModule::EmitDeferred() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3c7e3fd)
#<!-- -->30 0x0000000003c811d3 clang::CodeGen::CodeGenModule::Release() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3c811d3)
#<!-- -->31 0x0000000004104ada (anonymous namespace)::CodeGeneratorImpl::HandleTranslationUnit(clang::ASTContext&amp;) ModuleBuilder.cpp:0:0
#<!-- -->32 0x00000000041035fd clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x41035fd)
#<!-- -->33 0x00000000060a4979 clang::ParseAST(clang::Sema&amp;, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x60a4979)
#<!-- -->34 0x0000000004102eb8 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4102eb8)
#<!-- -->35 0x0000000004371739 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4371739)
#<!-- -->36 0x00000000042f139e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x42f139e)
#<!-- -->37 0x0000000004451e1e clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4451e1e)
#<!-- -->38 0x0000000000c13226 cc1_main(llvm::ArrayRef&lt;char const*&gt;, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc13226)
#<!-- -->39 0x0000000000c0aa6a ExecuteCC1Tool(llvm::SmallVectorImpl&lt;char const*&gt;&amp;, llvm::ToolContext const&amp;) driver.cpp:0:0
#<!-- -->40 0x00000000041443f9 void llvm::function_ref&lt;void ()&gt;::callback_fn&lt;clang::driver::CC1Command::Execute(llvm::ArrayRef&lt;std::optional&lt;llvm::StringRef&gt;&gt;, std::__cxx11::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt;&gt;*, bool*) const::'lambda'()&gt;(long) Job.cpp:0:0
#<!-- -->41 0x00000000037bf974 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref&lt;void ()&gt;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x37bf974)
#<!-- -->42 0x00000000041449ef clang::driver::CC1Command::Execute(llvm::ArrayRef&lt;std::optional&lt;llvm::StringRef&gt;&gt;, std::__cxx11::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt;&gt;*, bool*) const (.part.0) Job.cpp:0:0
#<!-- -->43 0x000000000410c755 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&amp;, clang::driver::Command const*&amp;, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x410c755)
#<!-- -->44 0x000000000410d1bd clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&amp;, llvm::SmallVectorImpl&lt;std::pair&lt;int, clang::driver::Command const*&gt;&gt;&amp;, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x410d1bd)
#<!-- -->45 0x00000000041150f5 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&amp;, llvm::SmallVectorImpl&lt;std::pair&lt;int, clang::driver::Command const*&gt;&gt;&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x41150f5)
#<!-- -->46 0x0000000000c105dc clang_main(int, char**, llvm::ToolContext const&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc105dc)
#<!-- -->47 0x0000000000b07a74 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xb07a74)
#<!-- -->48 0x00007f4ea9429d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#<!-- -->49 0x00007f4ea9429e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#<!-- -->50 0x0000000000c0a54e _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc0a54e)
clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation)
Compiler returned: 134

The test case is reduced from Highway's dispatch code https://github.com/google/highway/blob/cc0a171fb9bf8af5e8904b77259ce4ca5461172b/hwy/highway.h#L379 .

@jeremiahar
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Bisection between 400a02b (bad release/18.x) and 6009708 (good - 17.0.6) reveals that the first bad commit is 5518a9d.

@jeremiahar jeremiahar mentioned this issue Jan 31, 2024
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@jeremiahar
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This is no longer an issue now that the problematic code was reverted and a test was added to prevent the regression. #80050 It was also backported to the release/18.x branch in #80150 .

@bolshakov-a bolshakov-a mentioned this issue Mar 19, 2024
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bolshakov-a added a commit to bolshakov-a/llvm-project that referenced this issue Mar 20, 2024
@bolshakov-a
[clang][c++20] Fix code coverage mapping crash with generalized NTTPs
398ad87 
Introduced in llvm#78041, originally reported as llvm#79957 and fixed partially
in llvm#80050.

`OpaqueValueExpr` used with `TemplateArgument::StructuralValue` has no
corresponding source expression.

A test case with subobject-referring NTTP added.
efriedma-quic pushed a commit that referenced this issue May 24, 2024
@bolshakov-a
[clang][c++20] Fix code coverage mapping crash with generalized NTTPs (…
6be1a15 
…#85837)

Introduced in #78041, originally reported as #79957 and fixed partially
in #80050.

`OpaqueValueExpr` used with `TemplateArgument::StructuralValue` has no
corresponding source expression.

A test case with subobject-referring NTTP added.
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@EugeneZelenko @jeremiahar @llvmbot