unrecognized relocation cargo build failures with latest nightlies

[clux]

from the travis logs:

docker run -v /home/travis/build/clux/muslrust/test/plaincrate:/volume -w /volume -t clux/muslrust cargo build --verbose
    Updating registry `https://github.com/rust-lang/crates.io-index`
 Downloading rand v0.3.14
 Downloading libc v0.2.14
   Compiling libc v0.2.14
     Running `rustc /root/.cargo/registry/src/git.luolix.top-1ecc6299db9ec823/libc-0.2.14/src/lib.rs --crate-name libc --crate-type lib -g --cfg feature=\"default\" --cfg feature=\"use_std\" -C metadata=1f3392fe1afd1313 -C extra-filename=-1f3392fe1afd1313 --out-dir /volume/target/x86_64-unknown-linux-musl/debug/deps --emit=dep-info,link --target x86_64-unknown-linux-musl -L dependency=/volume/target/x86_64-unknown-linux-musl/debug/deps --cap-lints allow`
   Compiling rand v0.3.14
     Running `rustc /root/.cargo/registry/src/git.luolix.top-1ecc6299db9ec823/rand-0.3.14/src/lib.rs --crate-name rand --crate-type lib -g -C metadata=49a08859d086fffe -C extra-filename=-49a08859d086fffe --out-dir /volume/target/x86_64-unknown-linux-musl/debug/deps --emit=dep-info,link --target x86_64-unknown-linux-musl -L dependency=/volume/target/x86_64-unknown-linux-musl/debug/deps --extern libc=/volume/target/x86_64-unknown-linux-musl/debug/deps/liblibc-1f3392fe1afd1313.rlib --cap-lints allow`
   Compiling plaincrate v0.1.0 (file:///volume)
     Running `rustc src/main.rs --crate-name plaincrate --crate-type bin -g -C metadata=0ac13fd092ed66e9 --out-dir /volume/target/x86_64-unknown-linux-musl/debug --emit=dep-info,link --target x86_64-unknown-linux-musl -L dependency=/volume/target/x86_64-unknown-linux-musl/debug/deps --extern rand=/volume/target/x86_64-unknown-linux-musl/debug/deps/librand-49a08859d086fffe.rlib`
error: linking with `cc` failed: exit code: 1 
note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-nostdlib" "-static" "-Wl,--eh-frame-hdr" "-Wl,-(" "-m64" "/usr/local/lib/rustlib/x86_64-unknown-linux-musl/lib/crt1.o" "/usr/local/lib/rustlib/x86_64-unknown-linux-musl/lib/crti.o" "-L" "/usr/local/lib/rustlib/x86_64-unknown-linux-musl/lib" "/volume/target/x86_64-unknown-linux-musl/debug/plaincrate.0.o" "-o" "/volume/target/x86_64-unknown-linux-musl/debug/plaincrate" "-Wl,--gc-sections" "-nodefaultlibs" "-L" "/volume/target/x86_64-unknown-linux-musl/debug/deps" "-L" "/usr/local/lib/rustlib/x86_64-unknown-linux-musl/lib" "-Wl,-Bstatic" "-Wl,-Bdynamic" "/volume/target/x86_64-unknown-linux-musl/debug/deps/librand-49a08859d086fffe.rlib" "/volume/target/x86_64-unknown-linux-musl/debug/deps/liblibc-1f3392fe1afd1313.rlib" "/usr/local/lib/rustlib/x86_64-unknown-linux-musl/lib/libstd-c8005792.rlib" "/usr/local/lib/rustlib/x86_64-unknown-linux-musl/lib/libpanic_unwind-c8005792.rlib" "/usr/local/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind-c8005792.rlib" "/usr/local/lib/rustlib/x86_64-unknown-linux-musl/lib/librand-c8005792.rlib" "/usr/local/lib/rustlib/x86_64-unknown-linux-musl/lib/libcollections-c8005792.rlib" "/usr/local/lib/rustlib/x86_64-unknown-linux-musl/lib/librustc_unicode-c8005792.rlib" "/usr/local/lib/rustlib/x86_64-unknown-linux-musl/lib/liballoc-c8005792.rlib" "/usr/local/lib/rustlib/x86_64-unknown-linux-musl/lib/liballoc_jemalloc-c8005792.rlib" "/usr/local/lib/rustlib/x86_64-unknown-linux-musl/lib/liblibc-c8005792.rlib" "/usr/local/lib/rustlib/x86_64-unknown-linux-musl/lib/libcore-c8005792.rlib" "-l" "compiler-rt" "/usr/local/lib/rustlib/x86_64-unknown-linux-musl/lib/crtn.o" "-Wl,-)" 
note: /usr/bin/ld: /usr/local/lib/rustlib/x86_64-unknown-linux-musl/lib/liballoc_jemalloc-c8005792.rlib(jemalloc.pic.o): unrecognized relocation (0x2a) in section `.text.malloc_conf_init'
/usr/bin/ld: final link failed: Bad value
collect2: error: ld returned 1 exit status

and

docker run -v /home/travis/build/clux/muslrust/test/plaincrate:/volume -w /volume -t clux/muslrust cargo build --verbose
    Updating registry `https://github.com/rust-lang/crates.io-index`
 Downloading rand v0.3.14
 Downloading libc v0.2.15
   Compiling libc v0.2.15
     Running `rustc /root/.cargo/registry/src/git.luolix.top-1ecc6299db9ec823/libc-0.2.15/src/lib.rs --crate-name libc --crate-type lib -g --cfg feature=\"use_std\" --cfg feature=\"default\" -C metadata=1bd8847afb79f283 -C extra-filename=-1bd8847afb79f283 --out-dir /volume/target/x86_64-unknown-linux-musl/debug/deps --emit=dep-info,link --target x86_64-unknown-linux-musl -L dependency=/volume/target/x86_64-unknown-linux-musl/debug/deps --cap-lints allow`
   Compiling rand v0.3.14
     Running `rustc /root/.cargo/registry/src/git.luolix.top-1ecc6299db9ec823/rand-0.3.14/src/lib.rs --crate-name rand --crate-type lib -g -C metadata=49a08859d086fffe -C extra-filename=-49a08859d086fffe --out-dir /volume/target/x86_64-unknown-linux-musl/debug/deps --emit=dep-info,link --target x86_64-unknown-linux-musl -L dependency=/volume/target/x86_64-unknown-linux-musl/debug/deps --extern libc=/volume/target/x86_64-unknown-linux-musl/debug/deps/liblibc-1bd8847afb79f283.rlib --cap-lints allow`
   Compiling plaincrate v0.1.0 (file:///volume)
     Running `rustc src/main.rs --crate-name plaincrate --crate-type bin -g -C metadata=0ac13fd092ed66e9 --out-dir /volume/target/x86_64-unknown-linux-musl/debug --emit=dep-info,link --target x86_64-unknown-linux-musl -L dependency=/volume/target/x86_64-unknown-linux-musl/debug/deps --extern rand=/volume/target/x86_64-unknown-linux-musl/debug/deps/librand-49a08859d086fffe.rlib`
error: linking with `cc` failed: exit code: 1 
note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-nostdlib" "-static" "-Wl,--eh-frame-hdr" "-Wl,-(" "-m64" "/usr/local/lib/rustlib/x86_64-unknown-linux-musl/lib/crt1.o" "/usr/local/lib/rustlib/x86_64-unknown-linux-musl/lib/crti.o" "-L" "/usr/local/lib/rustlib/x86_64-unknown-linux-musl/lib" "/volume/target/x86_64-unknown-linux-musl/debug/plaincrate.0.o" "-o" "/volume/target/x86_64-unknown-linux-musl/debug/plaincrate" "-Wl,--gc-sections" "-nodefaultlibs" "-L" "/volume/target/x86_64-unknown-linux-musl/debug/deps" "-L" "/usr/local/lib/rustlib/x86_64-unknown-linux-musl/lib" "-Wl,-Bstatic" "-Wl,-Bdynamic" "/volume/target/x86_64-unknown-linux-musl/debug/deps/librand-49a08859d086fffe.rlib" "/volume/target/x86_64-unknown-linux-musl/debug/deps/liblibc-1bd8847afb79f283.rlib" "/usr/local/lib/rustlib/x86_64-unknown-linux-musl/lib/libstd-c8005792.rlib" "/usr/local/lib/rustlib/x86_64-unknown-linux-musl/lib/libpanic_unwind-c8005792.rlib" "/usr/local/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind-c8005792.rlib" "/usr/local/lib/rustlib/x86_64-unknown-linux-musl/lib/librand-c8005792.rlib" "/usr/local/lib/rustlib/x86_64-unknown-linux-musl/lib/libcollections-c8005792.rlib" "/usr/local/lib/rustlib/x86_64-unknown-linux-musl/lib/librustc_unicode-c8005792.rlib" "/usr/local/lib/rustlib/x86_64-unknown-linux-musl/lib/liballoc-c8005792.rlib" "/usr/local/lib/rustlib/x86_64-unknown-linux-musl/lib/liballoc_jemalloc-c8005792.rlib" "/usr/local/lib/rustlib/x86_64-unknown-linux-musl/lib/liblibc-c8005792.rlib" "/usr/local/lib/rustlib/x86_64-unknown-linux-musl/lib/libcore-c8005792.rlib" "-l" "compiler-rt" "/usr/local/lib/rustlib/x86_64-unknown-linux-musl/lib/crtn.o" "-Wl,-)" 
note: /usr/bin/ld: /usr/local/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind-c8005792.rlib(libunwind.cpp.o): unrecognized relocation (0x2a) in section `.text._ZL10assert_rtnPKcS0_iS0_'
/usr/bin/ld: final link failed: Bad value
collect2: error: ld returned 1 exit status

not sure what's going on here - nothing's changed on this end.

[bencord0]

Looks like someone in debian saw this issue already. https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=808576

This also makes me wonder about the apis to use custom allocators. https://doc.rust-lang.org/book/custom-allocators.html Do the linkers do the right thing if the allocator used in one module is different to the allocators used in another? rust-lang/rust#31460 Maybe the cargo.lock needs an audit to make sure that none of our deps are forcing the allocator one way or another.

[clux]

Hm, if it's a Debian thing, maybe moving to sid is more sensible. We are building nightlies after all most of the time. I'll have a go.

This also makes me wonder about the apis to use custom allocators. https://doc.rust-lang.org/book/custom-allocators.html Do the linkers do the right thing if the allocator used in one module is different to the allocators used in another? rust-lang/rust#31460 Maybe the cargo.lock needs an audit to make sure that none of our deps are forcing the allocator one way or another.

That's a good question. But for the second part, all lockfiles are kept out of source and dependencies set to "*" in Cargo.toml so should be using latest behaviour.