[INFO] cloning repository https://github.com/bigcat26/learn-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bigcat26/learn-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbigcat26%2Flearn-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbigcat26%2Flearn-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ef3d82b164cb39105081a55f43f9971347613731
[INFO] checking bigcat26/learn-rust against master#836c31742687ba4e2f857b5b698e1e9e6b67619c for pr-81789
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbigcat26%2Flearn-rust" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bigcat26/learn-rust on toolchain 836c31742687ba4e2f857b5b698e1e9e6b67619c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/bigcat26/learn-rust
[INFO] finished tweaking git repo https://github.com/bigcat26/learn-rust
[INFO] tweaked toml for git repo https://github.com/bigcat26/learn-rust written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/bigcat26/learn-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6b4ba640eb0b93bd3d391af5f8cb34208192d3caeb5a3969422305bbf8ccb617
[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" "6b4ba640eb0b93bd3d391af5f8cb34208192d3caeb5a3969422305bbf8ccb617", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6b4ba640eb0b93bd3d391af5f8cb34208192d3caeb5a3969422305bbf8ccb617", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b4ba640eb0b93bd3d391af5f8cb34208192d3caeb5a3969422305bbf8ccb617", kill_on_drop: false }`
[INFO] [stdout] 6b4ba640eb0b93bd3d391af5f8cb34208192d3caeb5a3969422305bbf8ccb617
[INFO] running `Command { std: "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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 49c9452f08e469a332aae22245ef9e01deb0de8030132838812133071d9a8242
[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" "49c9452f08e469a332aae22245ef9e01deb0de8030132838812133071d9a8242", kill_on_drop: false }`
[INFO] [stderr] warning: The package `librust` provides no linkable target. The compiler might raise an error while compiling `noob`. Consider adding 'dylib' or 'rlib' to key `crate-type` in `librust`'s Cargo.toml. This warning might turn into a hard error in the future.
[INFO] [stderr] warning: The package `librust` provides no linkable target. The compiler might raise an error while compiling `noob`. Consider adding 'dylib' or 'rlib' to key `crate-type` in `librust`'s Cargo.toml. This warning might turn into a hard error in the future.
[INFO] [stderr]     Checking librust v0.1.0 (/opt/rustwide/workdir/librust)
[INFO] [stderr]     Checking noob v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0463]: can't find crate for `librust`
[INFO] [stdout]  --> src/main.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | extern crate librust;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `librust`
[INFO] [stdout]  --> src/main.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | extern crate librust;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `noob`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "49c9452f08e469a332aae22245ef9e01deb0de8030132838812133071d9a8242", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49c9452f08e469a332aae22245ef9e01deb0de8030132838812133071d9a8242", kill_on_drop: false }`
[INFO] [stdout] 49c9452f08e469a332aae22245ef9e01deb0de8030132838812133071d9a8242