[INFO] fetching crate discombobulate 0.1.4...
[INFO] testing discombobulate-0.1.4 against try#b83b707f97d809763b7861afa7638871f3339a33 for pr-145838-1
[INFO] extracting crate discombobulate 0.1.4 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate discombobulate 0.1.4
[INFO] finished tweaking crates.io crate discombobulate 0.1.4
[INFO] tweaked toml for crates.io crate discombobulate 0.1.4 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate discombobulate 0.1.4 on toolchain b83b707f97d809763b7861afa7638871f3339a33
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate discombobulate 0.1.4 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" "+b83b707f97d809763b7861afa7638871f3339a33" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5d4f4a2fdc6264fd378cb0a013d4d79afe74f281c130d33b14a0f728b6dc947b
[INFO] running `Command { std: "docker" "start" "-a" "5d4f4a2fdc6264fd378cb0a013d4d79afe74f281c130d33b14a0f728b6dc947b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5d4f4a2fdc6264fd378cb0a013d4d79afe74f281c130d33b14a0f728b6dc947b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5d4f4a2fdc6264fd378cb0a013d4d79afe74f281c130d33b14a0f728b6dc947b", kill_on_drop: false }`
[INFO] [stdout] 5d4f4a2fdc6264fd378cb0a013d4d79afe74f281c130d33b14a0f728b6dc947b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 197e3fb7ef85f1e6cd1d521b6abe80aa45e9fe1576f985dfd9ee0a58076891cd
[INFO] running `Command { std: "docker" "start" "-a" "197e3fb7ef85f1e6cd1d521b6abe80aa45e9fe1576f985dfd9ee0a58076891cd", kill_on_drop: false }`
[INFO] [stderr]    Compiling discombobulate v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lib.rs:45:12
[INFO] [stdout]    |
[INFO] [stdout] 45 |         Ok(mut f) => {
[INFO] [stdout]    |            ----^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.16s
[INFO] running `Command { std: "docker" "inspect" "197e3fb7ef85f1e6cd1d521b6abe80aa45e9fe1576f985dfd9ee0a58076891cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "197e3fb7ef85f1e6cd1d521b6abe80aa45e9fe1576f985dfd9ee0a58076891cd", kill_on_drop: false }`
[INFO] [stdout] 197e3fb7ef85f1e6cd1d521b6abe80aa45e9fe1576f985dfd9ee0a58076891cd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 55a7f396bfea329d1859c35d6909e46e730c6aecb598da45d9deb17e29133d30
[INFO] running `Command { std: "docker" "start" "-a" "55a7f396bfea329d1859c35d6909e46e730c6aecb598da45d9deb17e29133d30", kill_on_drop: false }`
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lib.rs:45:12
[INFO] [stdout]    |
[INFO] [stdout] 45 |         Ok(mut f) => {
[INFO] [stdout]    |            ----^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling discombobulate v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lib.rs:45:12
[INFO] [stdout]    |
[INFO] [stdout] 45 |         Ok(mut f) => {
[INFO] [stdout]    |            ----^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.31s
[INFO] running `Command { std: "docker" "inspect" "55a7f396bfea329d1859c35d6909e46e730c6aecb598da45d9deb17e29133d30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55a7f396bfea329d1859c35d6909e46e730c6aecb598da45d9deb17e29133d30", kill_on_drop: false }`
[INFO] [stdout] 55a7f396bfea329d1859c35d6909e46e730c6aecb598da45d9deb17e29133d30
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 3e8837d0d3919efb9a19028d273e50b3ac3e5ca20a704df0f8bbb5b559d3a425
[INFO] running `Command { std: "docker" "start" "-a" "3e8837d0d3919efb9a19028d273e50b3ac3e5ca20a704df0f8bbb5b559d3a425", kill_on_drop: false }`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:45:12
[INFO] [stderr]    |
[INFO] [stderr] 45 |         Ok(mut f) => {
[INFO] [stderr]    |            ----^
[INFO] [stderr]    |            |
[INFO] [stderr]    |            help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `discombobulate` (lib) generated 1 warning (run `cargo fix --lib -p discombobulate` to apply 1 suggestion)
[INFO] [stderr] warning: `discombobulate` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/discombobulate-da6c55b0aacd3c8c)
[INFO] [stderr]    Doc-tests discombobulate
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "3e8837d0d3919efb9a19028d273e50b3ac3e5ca20a704df0f8bbb5b559d3a425", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e8837d0d3919efb9a19028d273e50b3ac3e5ca20a704df0f8bbb5b559d3a425", kill_on_drop: false }`
[INFO] [stdout] 3e8837d0d3919efb9a19028d273e50b3ac3e5ca20a704df0f8bbb5b559d3a425