[INFO] cloning repository https://github.com/thomasfermi/JackCompiler
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/thomasfermi/JackCompiler" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthomasfermi%2FJackCompiler", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthomasfermi%2FJackCompiler'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e8f6f882182fbb0d2485afd13155c2436f1a506f
[INFO] checking thomasfermi/JackCompiler against try#0ab79c4b48ad19260fa46623f452c1b403a360e8 for pr-74315
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthomasfermi%2FJackCompiler" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/thomasfermi/JackCompiler on toolchain 0ab79c4b48ad19260fa46623f452c1b403a360e8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0ab79c4b48ad19260fa46623f452c1b403a360e8" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/thomasfermi/JackCompiler
[INFO] finished tweaking git repo https://github.com/thomasfermi/JackCompiler
[INFO] tweaked toml for git repo https://github.com/thomasfermi/JackCompiler written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/thomasfermi/JackCompiler already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0ab79c4b48ad19260fa46623f452c1b403a360e8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+0ab79c4b48ad19260fa46623f452c1b403a360e8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] df9085f0cd28a560591f75dcc77a1ada54781c8a00ba29feb17bf779242155ad
[INFO] running `Command { std: "docker" "start" "-a" "df9085f0cd28a560591f75dcc77a1ada54781c8a00ba29feb17bf779242155ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "df9085f0cd28a560591f75dcc77a1ada54781c8a00ba29feb17bf779242155ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df9085f0cd28a560591f75dcc77a1ada54781c8a00ba29feb17bf779242155ad", kill_on_drop: false }`
[INFO] [stdout] df9085f0cd28a560591f75dcc77a1ada54781c8a00ba29feb17bf779242155ad
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+0ab79c4b48ad19260fa46623f452c1b403a360e8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4ad71a0d8643795811d72d89becefae9908286d3c5ea6a9c81310d99d20c36e3
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "4ad71a0d8643795811d72d89becefae9908286d3c5ea6a9c81310d99d20c36e3", kill_on_drop: false }`
[INFO] [stderr]     Checking ucd-util v0.1.3
[INFO] [stderr]    Compiling regex v1.1.0
[INFO] [stderr]     Checking utf8-ranges v1.0.2
[INFO] [stderr]    Compiling memchr v2.1.2
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking smallvec v0.6.7
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking clap v2.32.0
[INFO] [stderr]     Checking regex-syntax v0.6.4
[INFO] [stderr]     Checking peek-nth v0.2.0
[INFO] [stderr]     Checking aho-corasick v0.6.9
[INFO] [stderr]     Checking jack_compiler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stdout]   --> src/main.rs:78:71
[INFO] [stdout]    |
[INFO] [stdout] 78 |             Err(why) => panic!("couldn't create {}: {}", display, why.description()),
[INFO] [stdout]    |                                                                       ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stdout]   --> src/main.rs:83:73
[INFO] [stdout]    |
[INFO] [stdout] 83 |             Err(why) => panic!("couldn't write to {}: {}", display, why.description()),
[INFO] [stdout]    |                                                                         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stdout]   --> src/main.rs:78:71
[INFO] [stdout]    |
[INFO] [stdout] 78 |             Err(why) => panic!("couldn't create {}: {}", display, why.description()),
[INFO] [stdout]    |                                                                       ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stdout]   --> src/main.rs:83:73
[INFO] [stdout]    |
[INFO] [stdout] 83 |             Err(why) => panic!("couldn't write to {}: {}", display, why.description()),
[INFO] [stdout]    |                                                                         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:68:13
[INFO] [stdout]    |
[INFO] [stdout] 68 |         let mut output_file_name = str::replace(
[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: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:68:13
[INFO] [stdout]    |
[INFO] [stdout] 68 |         let mut output_file_name = str::replace(
[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: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.27s
[INFO] running `Command { std: "docker" "inspect" "4ad71a0d8643795811d72d89becefae9908286d3c5ea6a9c81310d99d20c36e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ad71a0d8643795811d72d89becefae9908286d3c5ea6a9c81310d99d20c36e3", kill_on_drop: false }`
[INFO] [stdout] 4ad71a0d8643795811d72d89becefae9908286d3c5ea6a9c81310d99d20c36e3