[INFO] cloning repository https://github.com/ivanmoreau/fastfibo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ivanmoreau/fastfibo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fivanmoreau%2Ffastfibo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fivanmoreau%2Ffastfibo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 44cf73b8f5da8c536e857b693aa4c8b28c135ca3
[INFO] testing ivanmoreau/fastfibo against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fivanmoreau%2Ffastfibo" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ivanmoreau/fastfibo on toolchain a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ivanmoreau/fastfibo
[INFO] finished tweaking git repo https://github.com/ivanmoreau/fastfibo
[INFO] tweaked toml for git repo https://github.com/ivanmoreau/fastfibo written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/ivanmoreau/fastfibo already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fd4af0682c3d3033d09b21fa39d2d9e8b4b4d6806b6cfee5ae2f9fd439a1a02c
[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" "fd4af0682c3d3033d09b21fa39d2d9e8b4b4d6806b6cfee5ae2f9fd439a1a02c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fd4af0682c3d3033d09b21fa39d2d9e8b4b4d6806b6cfee5ae2f9fd439a1a02c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd4af0682c3d3033d09b21fa39d2d9e8b4b4d6806b6cfee5ae2f9fd439a1a02c", kill_on_drop: false }`
[INFO] [stdout] fd4af0682c3d3033d09b21fa39d2d9e8b4b4d6806b6cfee5ae2f9fd439a1a02c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6754b3c741e2ec3d0b9fc3aa6cc1eda57f931173a97607ea3216debe5a971470
[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" "6754b3c741e2ec3d0b9fc3aa6cc1eda57f931173a97607ea3216debe5a971470", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.103
[INFO] [stderr]    Compiling fastfibo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type `mpz_ptr` should have an upper camel case name
[INFO] [stdout]   --> src/main.rs:22:10
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub type mpz_ptr = *mut __mpz_struct;
[INFO] [stdout]    |          ^^^^^^^ help: convert the identifier to upper camel case: `MpzPtr`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `mpz_srcptr` should have an upper camel case name
[INFO] [stdout]   --> src/main.rs:23:10
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub type mpz_srcptr = *const __mpz_struct;
[INFO] [stdout]    |          ^^^^^^^^^^ help: convert the identifier to upper camel case: `MpzSrcptr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `gmpz_steal`
[INFO] [stdout]   --> src/main.rs:48:4
[INFO] [stdout]    |
[INFO] [stdout] 48 | fn gmpz_steal(val: &mpz_t) -> mpz_t {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: linking with `cc` failed: exit status: 1
[INFO] [stdout]   |
[INFO] [stdout]   = note: "cc" "-m64" "/opt/rustwide/target/debug/deps/fastfibo-7392d6852aec0477.fastfibo.53e4daf3-cgu.0.rcgu.o" "/opt/rustwide/target/debug/deps/fastfibo-7392d6852aec0477.fastfibo.53e4daf3-cgu.1.rcgu.o" "/opt/rustwide/target/debug/deps/fastfibo-7392d6852aec0477.fastfibo.53e4daf3-cgu.2.rcgu.o" "/opt/rustwide/target/debug/deps/fastfibo-7392d6852aec0477.fastfibo.53e4daf3-cgu.3.rcgu.o" "/opt/rustwide/target/debug/deps/fastfibo-7392d6852aec0477.fastfibo.53e4daf3-cgu.4.rcgu.o" "/opt/rustwide/target/debug/deps/fastfibo-7392d6852aec0477.fastfibo.53e4daf3-cgu.5.rcgu.o" "/opt/rustwide/target/debug/deps/fastfibo-7392d6852aec0477.fastfibo.53e4daf3-cgu.6.rcgu.o" "-Wl,--as-needed" "-L" "/opt/rustwide/target/debug/deps" "-L" "/opt/rustwide/workdir" "-L" "/opt/rustwide/rustup-home/toolchains/a77da2d454e6caa227a85b16410b95f93495e7e0/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "-Wl,--whole-archive" "-lgmp" "-Wl,--no-whole-archive" "-Wl,-Bdynamic" "-lc" "-Wl,-Bstatic" "/opt/rustwide/rustup-home/toolchains/a77da2d454e6caa227a85b16410b95f93495e7e0/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-2a6a2797f7a73818.rlib" "/opt/rustwide/rustup-home/toolchains/a77da2d454e6caa227a85b16410b95f93495e7e0/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-0e3656b1fda5fd7b.rlib" "/opt/rustwide/rustup-home/toolchains/a77da2d454e6caa227a85b16410b95f93495e7e0/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-13b419dfbcf9c1f8.rlib" "-Wl,-Bdynamic" "-Wl,--eh-frame-hdr" "-Wl,-znoexecstack" "-L" "/opt/rustwide/rustup-home/toolchains/a77da2d454e6caa227a85b16410b95f93495e7e0/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/opt/rustwide/target/debug/deps/fastfibo-7392d6852aec0477" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro,-znow" "-nodefaultlibs"
[INFO] [stdout]   = note: /usr/bin/ld: /opt/rustwide/workdir/libgmp.a: member /opt/rustwide/workdir/libgmp.a(assert.o) in archive is not an object
[INFO] [stdout]           collect2: error: ld returned 1 exit status
[INFO] [stdout]           
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fastfibo` due to 2 previous errors; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "6754b3c741e2ec3d0b9fc3aa6cc1eda57f931173a97607ea3216debe5a971470", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6754b3c741e2ec3d0b9fc3aa6cc1eda57f931173a97607ea3216debe5a971470", kill_on_drop: false }`
[INFO] [stdout] 6754b3c741e2ec3d0b9fc3aa6cc1eda57f931173a97607ea3216debe5a971470