mold segfaults in emit-relocs* tests

[nekopsykose]

i then reran them on hello world by hand with gcc -fuse-ld=mold -o exe -Wl,-emit-relocs main.c

log:

$ gcc -fuse-ld=mold -o exe -Wl,-emit-relocs main.c 
/home/demon/src/aports/community/mold/src/mold-1.9.0/elf/output-chunks.cc:3104:27: runtime error: member access within null pointer of type 'mold::elf::Chunk<mold::elf::E>'
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/demon/src/aports/community/mold/src/mold-1.9.0/elf/output-chunks.cc:3104:27 in 
AddressSanitizer:DEADLYSIGNAL
=================================================================
==780098==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000058 (pc 0x55dd148b740c bp 0x000000000058 sp 0x7f22c89ea9d0 T10)
==780098==The signal is caused by a READ memory access.
==780098==Hint: address points to the zero page.
    #0 0x55dd148b740c in mold::elf::RelocSection<mold::elf::X86_64>::copy_buf(mold::elf::Context<mold::elf::X86_64>&)::'lambda'(mold::elf::ElfRel<mold::elf::X86_64>&, mold::elf::InputSection<mold::elf::X86_64>&, mold::elf::ElfRel<mold::elf::X86_64> const&)::operator()(mold::elf::ElfRel<mold::elf::X86_64>&, mold::elf::InputSection<mold::elf::X86_64>&, mold::elf::ElfRel<mold::elf::X86_64> const&) const /home/demon/src/aports/community/mold/src/mold-1.9.0/elf/output-chunks.cc:3104:27
    #1 0x55dd1300bfc3 in UnwindImpl /home/buildozer/aports/main/llvm-runtimes/src/llvm-project-15.0.6.src/compiler-rt/lib/asan/asan_stack.cpp
    #2 0x55dd130315f5 in ReportDeadlySignalImpl /home/buildozer/aports/main/llvm-runtimes/src/llvm-project-15.0.6.src/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_report.cpp:229:3
    #3 0x55dd130315f5 in ReportDeadlySignal /home/buildozer/aports/main/llvm-runtimes/src/llvm-project-15.0.6.src/compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_report.cpp:243:5
    #4 0x55dd130061f5 in ~ScopedInErrorReport /home/buildozer/aports/main/llvm-runtimes/src/llvm-project-15.0.6.src/compiler-rt/lib/asan/asan_report.cpp:143:50
    #5 0x55dd13006012 in ReportDeadlySignal /home/buildozer/aports/main/llvm-runtimes/src/llvm-project-15.0.6.src/compiler-rt/lib/asan/asan_report.cpp:220:1
    #6 0x55dd13005641 in AsanOnDeadlySignal /home/buildozer/aports/main/llvm-runtimes/src/llvm-project-15.0.6.src/compiler-rt/lib/asan/asan_posix.cpp:40:3
    #7 0x7f22eabbe139  /home/demon/src/aports/main/musl/src/v1.2.3/src/signal/x86_64/restore.s:1

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV /home/demon/src/aports/community/mold/src/mold-1.9.0/elf/output-chunks.cc:3104:27 in mold::elf::RelocSection<mold::elf::X86_64>::copy_buf(mold::elf::Context<mold::elf::X86_64>&)::'lambda'(mold::elf::ElfRel<mold::elf::X86_64>&, mold::elf::InputSection<mold::elf::X86_64>&, mold::elf::ElfRel<mold::elf::X86_64> const&)::operator()(mold::elf::ElfRel<mold::elf::X86_64>&, mold::elf::InputSection<mold::elf::X86_64>&, mold::elf::ElfRel<mold::elf::X86_64> const&) const
Thread T10 created by T6 here:
    #0 0x55dd12feff0c in __interceptor_pthread_create /home/buildozer/aports/main/llvm-runtimes/src/llvm-project-15.0.6.src/compiler-rt/lib/asan/asan_interceptors.cpp:208:3
    #1 0x7f22da4f96df in tbb::detail::r1::rml::internal::thread_monitor::launch(void* (*)(void*), void*, unsigned long) /home/demon/src/aports/community/libtbb/src/oneTBB-2021.8.0/src/tbb/rml_thread_monitor.h:208:29
    #2 0x7f22da4f96df in tbb::detail::r1::rml::private_worker::wake_or_launch() /home/demon/src/aports/community/libtbb/src/oneTBB-2021.8.0/src/tbb/private_server.cpp:305:51
    #3 0x7f22da4f96df in tbb::detail::r1::rml::private_server::wake_some(int) /home/demon/src/aports/community/libtbb/src/oneTBB-2021.8.0/src/tbb/private_server.cpp:412:27
    #4 0x3fffff  (<unknown module>)

Thread T6 created by T1 here:
    #0 0x55dd12feff0c in __interceptor_pthread_create /home/buildozer/aports/main/llvm-runtimes/src/llvm-project-15.0.6.src/compiler-rt/lib/asan/asan_interceptors.cpp:208:3
    #1 0x7f22da4f96df in tbb::detail::r1::rml::internal::thread_monitor::launch(void* (*)(void*), void*, unsigned long) /home/demon/src/aports/community/libtbb/src/oneTBB-2021.8.0/src/tbb/rml_thread_monitor.h:208:29
    #2 0x7f22da4f96df in tbb::detail::r1::rml::private_worker::wake_or_launch() /home/demon/src/aports/community/libtbb/src/oneTBB-2021.8.0/src/tbb/private_server.cpp:305:51
    #3 0x7f22da4f96df in tbb::detail::r1::rml::private_server::wake_some(int) /home/demon/src/aports/community/libtbb/src/oneTBB-2021.8.0/src/tbb/private_server.cpp:412:27
    #4 0x7f22d6f06f7f  (<unknown module>)

Thread T1 created by T0 here:
    #0 0x55dd12feff0c in __interceptor_pthread_create /home/buildozer/aports/main/llvm-runtimes/src/llvm-project-15.0.6.src/compiler-rt/lib/asan/asan_interceptors.cpp:208:3
    #1 0x7f22da4f96df in tbb::detail::r1::rml::internal::thread_monitor::launch(void* (*)(void*), void*, unsigned long) /home/demon/src/aports/community/libtbb/src/oneTBB-2021.8.0/src/tbb/rml_thread_monitor.h:208:29
    #2 0x7f22da4f96df in tbb::detail::r1::rml::private_worker::wake_or_launch() /home/demon/src/aports/community/libtbb/src/oneTBB-2021.8.0/src/tbb/private_server.cpp:305:51
    #3 0x7f22da4f96df in tbb::detail::r1::rml::private_server::wake_some(int) /home/demon/src/aports/community/libtbb/src/oneTBB-2021.8.0/src/tbb/private_server.cpp:412:27
    #4 0x3fffff  (<unknown module>)

==780098==ABORTING
collect2: error: ld returned 1 exit status

no idea what the real cause is this time :)

for reference, this is in on musl libc (alpine).