[INFO] cloning repository https://github.com/bmollot/letter-c
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bmollot/letter-c" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbmollot%2Fletter-c", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbmollot%2Fletter-c'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] edb13f1cf18788bcee1810a9cc2b8a7d0d49db84
[INFO] checking bmollot/letter-c against try#1383df06117fd218068d1f39fd5326256dd4a348 for pr-145181
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbmollot%2Fletter-c" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/bmollot/letter-c
[INFO] finished tweaking git repo https://github.com/bmollot/letter-c
[INFO] tweaked toml for git repo https://github.com/bmollot/letter-c written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/bmollot/letter-c on toolchain 1383df06117fd218068d1f39fd5326256dd4a348
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1383df06117fd218068d1f39fd5326256dd4a348" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/bmollot/letter-c already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1383df06117fd218068d1f39fd5326256dd4a348" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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:ae6f63d130afcfff7f91f5ba9fdb2a74d52830289c6a2ea2d23a94dcfb480a0d" "/opt/rustwide/cargo-home/bin/cargo" "+1383df06117fd218068d1f39fd5326256dd4a348" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 80c822cbe04386b9e9b983131e0093867973b042f10592fc45d41795e8a9c7b8
[INFO] running `Command { std: "docker" "start" "-a" "80c822cbe04386b9e9b983131e0093867973b042f10592fc45d41795e8a9c7b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "80c822cbe04386b9e9b983131e0093867973b042f10592fc45d41795e8a9c7b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80c822cbe04386b9e9b983131e0093867973b042f10592fc45d41795e8a9c7b8", kill_on_drop: false }`
[INFO] [stdout] 80c822cbe04386b9e9b983131e0093867973b042f10592fc45d41795e8a9c7b8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "RUSTDOCFLAGS=--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:ae6f63d130afcfff7f91f5ba9fdb2a74d52830289c6a2ea2d23a94dcfb480a0d" "/opt/rustwide/cargo-home/bin/cargo" "+1383df06117fd218068d1f39fd5326256dd4a348" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 97538e68e1a1f49ca6e0cf6b55d89391bf537d270466b11c4c096ea4476420cd
[INFO] running `Command { std: "docker" "start" "-a" "97538e68e1a1f49ca6e0cf6b55d89391bf537d270466b11c4c096ea4476420cd", kill_on_drop: false }`
[INFO] [stderr]     Checking letter-c v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant `QuarterDot` is never constructed
[INFO] [stdout]   --> src/lib.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 52 | enum NoteDuration {
[INFO] [stdout]    |      ------------ variant in this enum
[INFO] [stdout] 53 |     Quarter,
[INFO] [stdout] 54 |     QuarterDot,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `NoteDuration` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `QuarterDot` is never constructed
[INFO] [stdout]   --> src/lib.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 52 | enum NoteDuration {
[INFO] [stdout]    |      ------------ variant in this enum
[INFO] [stdout] 53 |     Quarter,
[INFO] [stdout] 54 |     QuarterDot,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `NoteDuration` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `MEGALOVANIA_RAW` is never used
[INFO] [stdout]    --> src/lib.rs:245:11
[INFO] [stdout]     |
[INFO] [stdout] 245 |     const MEGALOVANIA_RAW: &'static str = "5|--d---------------d-------|
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.13s
[INFO] running `Command { std: "docker" "inspect" "97538e68e1a1f49ca6e0cf6b55d89391bf537d270466b11c4c096ea4476420cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97538e68e1a1f49ca6e0cf6b55d89391bf537d270466b11c4c096ea4476420cd", kill_on_drop: false }`
[INFO] [stdout] 97538e68e1a1f49ca6e0cf6b55d89391bf537d270466b11c4c096ea4476420cd