[INFO] fetching crate proto-vulcan 0.1.6...
[INFO] checking proto-vulcan-0.1.6 against master#19dd9535408db0f1ff3d16613619076aef524d19 for pr-115950
[INFO] extracting crate proto-vulcan 0.1.6 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate proto-vulcan 0.1.6 on toolchain 19dd9535408db0f1ff3d16613619076aef524d19
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+19dd9535408db0f1ff3d16613619076aef524d19" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate proto-vulcan 0.1.6
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate proto-vulcan 0.1.6
[INFO] tweaked toml for crates.io crate proto-vulcan 0.1.6 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate crates.io crate proto-vulcan 0.1.6 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" "+19dd9535408db0f1ff3d16613619076aef524d19" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_derive v1.0.128
[INFO] [stderr]   Downloaded proto-vulcan-macros v0.1.6
[INFO] [stderr]   Downloaded crossterm_winapi v0.6.2
[INFO] [stderr]   Downloaded serde v1.0.128
[INFO] [stderr]   Downloaded crossterm v0.18.2
[INFO] [stderr]   Downloaded libc v0.2.100
[INFO] [stderr]   Downloaded tui v0.14.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+19dd9535408db0f1ff3d16613619076aef524d19" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d701d3095ca7e0c81f3c09ea381c04a3e55d2ce2c7fbdc273dd1216c4d819b6f
[INFO] running `Command { std: "docker" "start" "-a" "d701d3095ca7e0c81f3c09ea381c04a3e55d2ce2c7fbdc273dd1216c4d819b6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d701d3095ca7e0c81f3c09ea381c04a3e55d2ce2c7fbdc273dd1216c4d819b6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d701d3095ca7e0c81f3c09ea381c04a3e55d2ce2c7fbdc273dd1216c4d819b6f", kill_on_drop: false }`
[INFO] [stdout] d701d3095ca7e0c81f3c09ea381c04a3e55d2ce2c7fbdc273dd1216c4d819b6f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+19dd9535408db0f1ff3d16613619076aef524d19" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0b0409280bea56b1366fcc08eff7c0416cb6f9c73de535505700b1ac8431828e
[INFO] running `Command { std: "docker" "start" "-a" "0b0409280bea56b1366fcc08eff7c0416cb6f9c73de535505700b1ac8431828e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling proto-vulcan-macros v0.1.6
[INFO] [stderr]     Checking proto-vulcan v0.1.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/relation/clpfd/distinctfd.rs:187:13
[INFO] [stdout]     |
[INFO] [stdout] 187 |         let mut mself = Rc::make_mut(&mut self);
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/relation/clpfd/distinctfd.rs:187:13
[INFO] [stdout]     |
[INFO] [stdout] 187 |         let mut mself = Rc::make_mut(&mut self);
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.68s
[INFO] running `Command { std: "docker" "inspect" "0b0409280bea56b1366fcc08eff7c0416cb6f9c73de535505700b1ac8431828e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0b0409280bea56b1366fcc08eff7c0416cb6f9c73de535505700b1ac8431828e", kill_on_drop: false }`
[INFO] [stdout] 0b0409280bea56b1366fcc08eff7c0416cb6f9c73de535505700b1ac8431828e