[INFO] cloning repository https://github.com/emergent/rust-ffi-callbacks-sample
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/emergent/rust-ffi-callbacks-sample" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femergent%2Frust-ffi-callbacks-sample", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femergent%2Frust-ffi-callbacks-sample'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 478e358665e3e0617ceae54f7a1d3a64b23b2ed1
[INFO] checking emergent/rust-ffi-callbacks-sample against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femergent%2Frust-ffi-callbacks-sample" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/emergent/rust-ffi-callbacks-sample on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/emergent/rust-ffi-callbacks-sample
[INFO] finished tweaking git repo https://github.com/emergent/rust-ffi-callbacks-sample
[INFO] tweaked toml for git repo https://github.com/emergent/rust-ffi-callbacks-sample written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/emergent/rust-ffi-callbacks-sample already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 398b1ff50584cc8425a8c3bc66a8e27b823e0abacd1a35cb243e132d6df12716
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "398b1ff50584cc8425a8c3bc66a8e27b823e0abacd1a35cb243e132d6df12716", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "398b1ff50584cc8425a8c3bc66a8e27b823e0abacd1a35cb243e132d6df12716", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "398b1ff50584cc8425a8c3bc66a8e27b823e0abacd1a35cb243e132d6df12716", kill_on_drop: false }`
[INFO] [stdout] 398b1ff50584cc8425a8c3bc66a8e27b823e0abacd1a35cb243e132d6df12716
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b282246c89e8b28ef7e9facb1e79fd76d15f6361380b1e94b197869a9f57c40e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b282246c89e8b28ef7e9facb1e79fd76d15f6361380b1e94b197869a9f57c40e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]    Compiling cc v1.0.60
[INFO] [stderr]    Compiling ccallbacks v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: Using built-in specs.
[INFO] [stderr] warning: COLLECT_GCC=cc
[INFO] [stderr] warning: OFFLOAD_TARGET_NAMES=nvptx-none:hsa
[INFO] [stderr] warning: OFFLOAD_TARGET_DEFAULT=1
[INFO] [stderr] warning: Target: x86_64-linux-gnu
[INFO] [stderr] warning: Configured with: ../src/configure -v --with-pkgversion='Ubuntu 9.3.0-10ubuntu2' --with-bugurl=file:///usr/share/doc/gcc-9/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++,gm2 --prefix=/usr --with-gcc-major-version-only --program-suffix=-9 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-plugin --enable-default-pie --with-system-zlib --with-target-system-zlib=auto --enable-objc-gc=auto --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none,hsa --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
[INFO] [stderr] warning: Thread model: posix
[INFO] [stderr] warning: gcc version 9.3.0 (Ubuntu 9.3.0-10ubuntu2)
[INFO] [stderr] warning: COLLECT_GCC_OPTIONS='-O0' '-ffunction-sections' '-fdata-sections' '-fPIC' '-g' '-fno-omit-frame-pointer' '-m64' '-Wall' '-Wextra' '-v' '-o' '/opt/rustwide/target/debug/build/ccallbacks-93b5447526314663/out/src/extlib.o' '-c' '-mtune=generic' '-march=x86-64'
[INFO] [stderr] warning:  /usr/lib/gcc/x86_64-linux-gnu/9/cc1 -quiet -v -imultiarch x86_64-linux-gnu src/extlib.c -quiet -dumpbase extlib.c -m64 -mtune=generic -march=x86-64 -auxbase-strip /opt/rustwide/target/debug/build/ccallbacks-93b5447526314663/out/src/extlib.o -g -O0 -Wall -Wextra -version -ffunction-sections -fdata-sections -fPIC -fno-omit-frame-pointer -fasynchronous-unwind-tables -fstack-protector-strong -Wformat-security -fstack-clash-protection -fcf-protection -o /tmp/cc4RoCHN.s
[INFO] [stderr] warning: GNU C17 (Ubuntu 9.3.0-10ubuntu2) version 9.3.0 (x86_64-linux-gnu)
[INFO] [stderr] warning: 	compiled by GNU C version 9.3.0, GMP version 6.2.0, MPFR version 4.0.2, MPC version 1.1.0, isl version isl-0.22.1-GMP
[INFO] [stderr] warning: 
[INFO] [stderr] warning: GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
[INFO] [stderr] warning: ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
[INFO] [stderr] warning: ignoring nonexistent directory "/usr/lib/gcc/x86_64-linux-gnu/9/include-fixed"
[INFO] [stderr] warning: ignoring nonexistent directory "/usr/lib/gcc/x86_64-linux-gnu/9/../../../../x86_64-linux-gnu/include"
[INFO] [stderr] warning: #include "..." search starts here:
[INFO] [stderr] warning: #include <...> search starts here:
[INFO] [stderr] warning:  /usr/lib/gcc/x86_64-linux-gnu/9/include
[INFO] [stderr] warning:  /usr/local/include
[INFO] [stderr] warning:  /usr/include/x86_64-linux-gnu
[INFO] [stderr] warning:  /usr/include
[INFO] [stderr] warning: End of search list.
[INFO] [stderr] warning: GNU C17 (Ubuntu 9.3.0-10ubuntu2) version 9.3.0 (x86_64-linux-gnu)
[INFO] [stderr] warning: 	compiled by GNU C version 9.3.0, GMP version 6.2.0, MPFR version 4.0.2, MPC version 1.1.0, isl version isl-0.22.1-GMP
[INFO] [stderr] warning: 
[INFO] [stderr] warning: GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
[INFO] [stderr] warning: Compiler executable checksum: 18dc4c39b54390aa2b5013fb4339d43f
[INFO] [stderr] warning: COLLECT_GCC_OPTIONS='-O0' '-ffunction-sections' '-fdata-sections' '-fPIC' '-g' '-fno-omit-frame-pointer' '-m64' '-Wall' '-Wextra' '-v' '-o' '/opt/rustwide/target/debug/build/ccallbacks-93b5447526314663/out/src/extlib.o' '-c' '-mtune=generic' '-march=x86-64'
[INFO] [stderr] warning:  as -v --64 -o /opt/rustwide/target/debug/build/ccallbacks-93b5447526314663/out/src/extlib.o /tmp/cc4RoCHN.s
[INFO] [stderr] warning: GNU assembler version 2.34 (x86_64-linux-gnu) using BFD version (GNU Binutils for Ubuntu) 2.34
[INFO] [stderr] warning: COMPILER_PATH=/usr/lib/gcc/x86_64-linux-gnu/9/:/usr/lib/gcc/x86_64-linux-gnu/9/:/usr/lib/gcc/x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/9/:/usr/lib/gcc/x86_64-linux-gnu/
[INFO] [stderr] warning: LIBRARY_PATH=/usr/lib/gcc/x86_64-linux-gnu/9/:/usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/9/../../../../lib/:/lib/x86_64-linux-gnu/:/lib/../lib/:/usr/lib/x86_64-linux-gnu/:/usr/lib/../lib/:/usr/lib/gcc/x86_64-linux-gnu/9/../../../:/lib/:/usr/lib/
[INFO] [stderr] warning: COLLECT_GCC_OPTIONS='-O0' '-ffunction-sections' '-fdata-sections' '-fPIC' '-g' '-fno-omit-frame-pointer' '-m64' '-Wall' '-Wextra' '-v' '-o' '/opt/rustwide/target/debug/build/ccallbacks-93b5447526314663/out/src/extlib.o' '-c' '-mtune=generic' '-march=x86-64'
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.22s
[INFO] running `Command { std: "docker" "inspect" "b282246c89e8b28ef7e9facb1e79fd76d15f6361380b1e94b197869a9f57c40e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b282246c89e8b28ef7e9facb1e79fd76d15f6361380b1e94b197869a9f57c40e", kill_on_drop: false }`
[INFO] [stdout] b282246c89e8b28ef7e9facb1e79fd76d15f6361380b1e94b197869a9f57c40e