[INFO] cloning repository https://github.com/ValorCat/language-alchemist
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ValorCat/language-alchemist" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FValorCat%2Flanguage-alchemist", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FValorCat%2Flanguage-alchemist'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dfe62a2f92357011fc6743571807b333ee380246
[INFO] checking ValorCat/language-alchemist against master#db1fb85cff63ad5fffe435e17128f99f9e1d970c for pr-89056
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FValorCat%2Flanguage-alchemist" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ValorCat/language-alchemist on toolchain db1fb85cff63ad5fffe435e17128f99f9e1d970c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ValorCat/language-alchemist
[INFO] finished tweaking git repo https://github.com/ValorCat/language-alchemist
[INFO] tweaked toml for git repo https://github.com/ValorCat/language-alchemist written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/ValorCat/language-alchemist already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3a5e22cdd000c3ac4db9b431703b1948bccc2d8c6940b3c2e7f23077403e56b8
[INFO] running `Command { std: "docker" "start" "-a" "3a5e22cdd000c3ac4db9b431703b1948bccc2d8c6940b3c2e7f23077403e56b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3a5e22cdd000c3ac4db9b431703b1948bccc2d8c6940b3c2e7f23077403e56b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a5e22cdd000c3ac4db9b431703b1948bccc2d8c6940b3c2e7f23077403e56b8", kill_on_drop: false }`
[INFO] [stdout] 3a5e22cdd000c3ac4db9b431703b1948bccc2d8c6940b3c2e7f23077403e56b8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1f03a8174c1d1a3abd993f9fb3a080dd1d0ed5afcf21f5953f21e62b1a1e08ff
[INFO] running `Command { std: "docker" "start" "-a" "1f03a8174c1d1a3abd993f9fb3a080dd1d0ed5afcf21f5953f21e62b1a1e08ff", kill_on_drop: false }`
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[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/main.rs:116:21
[INFO] [stdout]     |
[INFO] [stdout] 116 |                     curr_lang_idx.insert(languages.len() - 1);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Option::<T>::insert` that must be used
[INFO] [stdout]    --> src/main.rs:116:21
[INFO] [stdout]     |
[INFO] [stdout] 116 |                     curr_lang_idx.insert(languages.len() - 1);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you intended to set a value, consider assignment instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 48.47s
[INFO] running `Command { std: "docker" "inspect" "1f03a8174c1d1a3abd993f9fb3a080dd1d0ed5afcf21f5953f21e62b1a1e08ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f03a8174c1d1a3abd993f9fb3a080dd1d0ed5afcf21f5953f21e62b1a1e08ff", kill_on_drop: false }`
[INFO] [stdout] 1f03a8174c1d1a3abd993f9fb3a080dd1d0ed5afcf21f5953f21e62b1a1e08ff