[INFO] cloning repository https://github.com/Masber/ref_mut_vec
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Masber/ref_mut_vec" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMasber%2Fref_mut_vec", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMasber%2Fref_mut_vec'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 25e8827d743c2cf1c1387ab1ad3364e2d311b17f
[INFO] checking Masber/ref_mut_vec against try#63132bd615c9bf75e93af8405d00064212331708 for pr-153975
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMasber%2Fref_mut_vec" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Masber/ref_mut_vec
[INFO] finished tweaking git repo https://github.com/Masber/ref_mut_vec
[INFO] tweaked toml for git repo https://github.com/Masber/ref_mut_vec written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Masber/ref_mut_vec on toolchain 63132bd615c9bf75e93af8405d00064212331708
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+63132bd615c9bf75e93af8405d00064212331708" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Masber/ref_mut_vec 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" "+63132bd615c9bf75e93af8405d00064212331708" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+63132bd615c9bf75e93af8405d00064212331708" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e8c43b25064e231042cbfe906e9b6828b04b4231c35a2a84a420e6b65e247c06
[INFO] running `Command { std: "docker" "start" "-a" "e8c43b25064e231042cbfe906e9b6828b04b4231c35a2a84a420e6b65e247c06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e8c43b25064e231042cbfe906e9b6828b04b4231c35a2a84a420e6b65e247c06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e8c43b25064e231042cbfe906e9b6828b04b4231c35a2a84a420e6b65e247c06", kill_on_drop: false }`
[INFO] [stdout] e8c43b25064e231042cbfe906e9b6828b04b4231c35a2a84a420e6b65e247c06
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+63132bd615c9bf75e93af8405d00064212331708" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d14b8f506305cec109b532bfd27fcf6847afcde19bb25a89143762da396a23d7
[INFO] running `Command { std: "docker" "start" "-a" "d14b8f506305cec109b532bfd27fcf6847afcde19bb25a89143762da396a23d7", kill_on_drop: false }`
[INFO] [stderr]     Checking ref_mut_vec v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: expected identifier, found keyword `mut`
[INFO] [stdout]   --> src/main.rs:20:10
[INFO] [stdout]    |
[INFO] [stdout] 20 |         .mut()
[INFO] [stdout]    |          ^^^ expected identifier, found keyword
[INFO] [stdout]    |
[INFO] [stdout] help: escape `mut` to use it as an identifier
[INFO] [stdout]    |
[INFO] [stdout] 20 |         .r#mut()
[INFO] [stdout]    |          ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected identifier, found keyword `mut`
[INFO] [stdout]   --> src/main.rs:20:10
[INFO] [stdout]    |
[INFO] [stdout] 20 |         .mut()
[INFO] [stdout]    |          ^^^ expected identifier, found keyword
[INFO] [stdout]    |
[INFO] [stdout] help: escape `mut` to use it as an identifier
[INFO] [stdout]    |
[INFO] [stdout] 20 |         .r#mut()
[INFO] [stdout]    |          ++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `r#mut` found for mutable reference `&mut Vec<MyStructB>` in the current scope
[INFO] [stdout]   --> src/main.rs:20:10
[INFO] [stdout]    |
[INFO] [stdout] 19 |       let my_struct_a_vec: &mut Vec<MyStructA> = my_struct_b_vec
[INFO] [stdout]    |  ________________________________________________-
[INFO] [stdout] 20 | |         .mut()
[INFO] [stdout]    | |_________-^^^
[INFO] [stdout]    |
[INFO] [stdout] help: there is a method `as_mut` with a similar name
[INFO] [stdout]    |
[INFO] [stdout] 20 |         .as_mut()
[INFO] [stdout]    |          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `r#mut` found for mutable reference `&mut Vec<MyStructB>` in the current scope
[INFO] [stdout]   --> src/main.rs:20:10
[INFO] [stdout]    |
[INFO] [stdout] 19 |       let my_struct_a_vec: &mut Vec<MyStructA> = my_struct_b_vec
[INFO] [stdout]    |  ________________________________________________-
[INFO] [stdout] 20 | |         .mut()
[INFO] [stdout]    | |_________-^^^
[INFO] [stdout]    |
[INFO] [stdout] help: there is a method `as_mut` with a similar name
[INFO] [stdout]    |
[INFO] [stdout] 20 |         .as_mut()
[INFO] [stdout]    |          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ref_mut_vec` (bin "ref_mut_vec" test) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `ref_mut_vec` (bin "ref_mut_vec") due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "d14b8f506305cec109b532bfd27fcf6847afcde19bb25a89143762da396a23d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d14b8f506305cec109b532bfd27fcf6847afcde19bb25a89143762da396a23d7", kill_on_drop: false }`
[INFO] [stdout] d14b8f506305cec109b532bfd27fcf6847afcde19bb25a89143762da396a23d7
