[INFO] fetching crate loop-forever 1.0.2...
[INFO] checking loop-forever-1.0.2 against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] extracting crate loop-forever 1.0.2 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate loop-forever 1.0.2 on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate loop-forever 1.0.2
[INFO] finished tweaking crates.io crate loop-forever 1.0.2
[INFO] tweaked toml for crates.io crate loop-forever 1.0.2 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0b1fa9493dbe1f2a6f214c7875da44d2af2c60c666b5b269d17fc669758072aa
[INFO] running `"docker" "start" "-a" "0b1fa9493dbe1f2a6f214c7875da44d2af2c60c666b5b269d17fc669758072aa"`
[INFO] [stderr]     Checking loop-forever v1.0.2 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0464]: multiple matching crates for `libc`
[INFO] [stderr]  --> src/forever.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | extern crate libc;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: candidates:
[INFO] [stderr]           crate `libc`: /opt/rustwide/rustup-home/toolchains/2748a9fd93dd1a00a4521f4f16de5befbf77f6cd/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-8fef15f34590e6d5.rlib
[INFO] [stderr]           crate `libc`: /opt/rustwide/rustup-home/toolchains/2748a9fd93dd1a00a4521f4f16de5befbf77f6cd/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-d5a051182b3b0d49.rlib
[INFO] [stderr] 
[INFO] [stderr] error[E0463]: can't find crate for `libc`
[INFO] [stderr]  --> src/forever.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | extern crate libc;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0463`.
[INFO] [stderr] error: could not compile `loop-forever`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "0b1fa9493dbe1f2a6f214c7875da44d2af2c60c666b5b269d17fc669758072aa"`
[INFO] running `"docker" "rm" "-f" "0b1fa9493dbe1f2a6f214c7875da44d2af2c60c666b5b269d17fc669758072aa"`
[INFO] [stdout] 0b1fa9493dbe1f2a6f214c7875da44d2af2c60c666b5b269d17fc669758072aa