[INFO] cloning repository https://github.com/dodecaphonic/rust_ffi_example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dodecaphonic/rust_ffi_example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdodecaphonic%2Frust_ffi_example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdodecaphonic%2Frust_ffi_example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 73a1c32ee74f0848947012a1fdf456c29367a2b1
[INFO] testing dodecaphonic/rust_ffi_example against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdodecaphonic%2Frust_ffi_example" "/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/dodecaphonic/rust_ffi_example on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dodecaphonic/rust_ffi_example
[INFO] finished tweaking git repo https://github.com/dodecaphonic/rust_ffi_example
[INFO] tweaked toml for git repo https://github.com/dodecaphonic/rust_ffi_example written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/dodecaphonic/rust_ffi_example already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e1e82418a76ddb84d30a133830ba50e305d7a22df0ec5038127af157b3b667a8
[INFO] running `Command { std: "docker" "start" "-a" "e1e82418a76ddb84d30a133830ba50e305d7a22df0ec5038127af157b3b667a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e1e82418a76ddb84d30a133830ba50e305d7a22df0ec5038127af157b3b667a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e1e82418a76ddb84d30a133830ba50e305d7a22df0ec5038127af157b3b667a8", kill_on_drop: false }`
[INFO] [stdout] e1e82418a76ddb84d30a133830ba50e305d7a22df0ec5038127af157b3b667a8
[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=warn" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1d0e33390a08f6e3a79f46d2b7e53285dfef9232b446d2c58d0fee8c6559f9ea
[INFO] running `Command { std: "docker" "start" "-a" "1d0e33390a08f6e3a79f46d2b7e53285dfef9232b446d2c58d0fee8c6559f9ea", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_ffi_example v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note: "cc" "-m64" "/opt/rustwide/target/debug/deps/rust_ffi_example-e79c65bb96b97912.rust_ffi_example.5b1458be-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/rust_ffi_example-e79c65bb96b97912.rust_ffi_example.5b1458be-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/rust_ffi_example-e79c65bb96b97912.rust_ffi_example.5b1458be-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/rust_ffi_example-e79c65bb96b97912.rust_ffi_example.5b1458be-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/rust_ffi_example-e79c65bb96b97912.rust_ffi_example.5b1458be-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/rust_ffi_example-e79c65bb96b97912.rust_ffi_example.5b1458be-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/rust_ffi_example-e79c65bb96b97912.rust_ffi_example.5b1458be-cgu.6.rcgu.o" "/opt/rustwide/target/debug/deps/rust_ffi_example-e79c65bb96b97912.rust_ffi_example.5b1458be-cgu.7.rcgu.o" "/opt/rustwide/target/debug/deps/rust_ffi_example-e79c65bb96b97912.rust_ffi_example.5b1458be-cgu.8.rcgu.o" "/opt/rustwide/target/debug/deps/rust_ffi_example-e79c65bb96b97912.4mmphar3la2nwxn9.rcgu.o" "-Wl,--as-needed" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-lmagic" "-Wl,--start-group" "-Wl,-Bstatic" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-ff9290e971253a38.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-5534b29ea7b2d8f5.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libobject-8bfbb13072fc2761.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libmemchr-d6d1fa92fa620f17.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libaddr2line-7cfd201521727d95.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgimli-0e8010e8fce8e5a7.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-19093fec3c6dd913.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd_detect-89c4cbe9256c1890.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libhashbrown-73e4507673363945.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libminiz_oxide-3fe98c0f46f27964.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libadler-a76787f08d45e37d.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_alloc-8cea480e62c5b261.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-1fb939608cd05a1c.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-842e67e3ab562f66.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-0c1c8fec3b1a54cc.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-689faa634b72af17.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-6c2c561a8181be5e.rlib" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-88c4d85fe493b0a6.rlib" "-Wl,--end-group" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-f5394bdb1df5df01.rlib" "-Wl,-Bdynamic" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-Wl,--eh-frame-hdr" "-Wl,-znoexecstack" "-L" "/opt/rustwide/rustup-home/toolchains/beta-2022-04-10-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/rust_ffi_example-e79c65bb96b97912" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro,-znow" "-nodefaultlibs"
[INFO] [stdout]   = note: /usr/bin/ld: /opt/rustwide/target/debug/deps/rust_ffi_example-e79c65bb96b97912.rust_ffi_example.5b1458be-cgu.5.rcgu.o: in function `rust_ffi_example::magic::pow':
[INFO] [stdout]           /opt/rustwide/workdir/src/main.rs:18: undefined reference to `magic_pow'
[INFO] [stdout]           /usr/bin/ld: /opt/rustwide/target/debug/deps/rust_ffi_example-e79c65bb96b97912.rust_ffi_example.5b1458be-cgu.5.rcgu.o: in function `rust_ffi_example::magic::multiply':
[INFO] [stdout]           /opt/rustwide/workdir/src/main.rs:24: undefined reference to `magic_multiply'
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout]   = help: some `extern` functions couldn't be found; some native libraries may need to be installed or have their path specified
[INFO] [stdout]   = note: use the `-l` flag to specify native libraries to link
[INFO] [stdout]   = note: use the `cargo:rustc-link-lib` directive to specify the native libraries to link with Cargo (see https://doc.rust-lang.org/cargo/reference/build-scripts.html#cargorustc-link-libkindname)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust_ffi_example` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "1d0e33390a08f6e3a79f46d2b7e53285dfef9232b446d2c58d0fee8c6559f9ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d0e33390a08f6e3a79f46d2b7e53285dfef9232b446d2c58d0fee8c6559f9ea", kill_on_drop: false }`
[INFO] [stdout] 1d0e33390a08f6e3a79f46d2b7e53285dfef9232b446d2c58d0fee8c6559f9ea