[INFO] updating cached repository https://github.com/ZuiSong/chen_lang
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5728a09d1a628038d7b56908be6c102f426d7a43
[INFO] checking ZuiSong/chen_lang against master#fdc0011561c6365c596dfd8fa1ef388162bc89c7 for pr-66504-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FZuiSong%2Fchen_lang" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ZuiSong/chen_lang on toolchain fdc0011561c6365c596dfd8fa1ef388162bc89c7
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/ZuiSong/chen_lang
[INFO] finished tweaking git repo https://github.com/ZuiSong/chen_lang
[INFO] tweaked toml for git repo https://github.com/ZuiSong/chen_lang written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/ZuiSong/chen_lang already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "/opt/rustwide/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 200683399cab02458ddc64c1577f8ba54e752e55188f97cf089757f475a7dd0d
[INFO] running `"docker" "start" "-a" "200683399cab02458ddc64c1577f8ba54e752e55188f97cf089757f475a7dd0d"`
[INFO] [stderr]    Compiling winapi v0.3.8
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]     Checking quickcheck v0.9.0
[INFO] [stderr]     Checking winconsole v0.10.0
[INFO] [stderr]     Checking colored v1.8.0
[INFO] [stderr]     Checking simple_logger v1.3.0
[INFO] [stderr]    Compiling synstructure v0.12.1
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]     Checking failure v0.1.6
[INFO] [stderr]     Checking chen_lang v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `log::*`
[INFO] [stderr]  --> src/tests/expression_test.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use log::*;
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `aa`
[INFO] [stderr]   --> src/bin/hello.rs:15:7
[INFO] [stderr]    |
[INFO] [stderr] 15 | fn f1(aa: HashMap<String, String>) {}
[INFO] [stderr]    |       ^^ help: consider prefixing with an underscore: `_aa`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `aa`
[INFO] [stderr]   --> src/bin/hello.rs:17:7
[INFO] [stderr]    |
[INFO] [stderr] 17 | fn f2(aa: &HashMap<String, String>) {}
[INFO] [stderr]    |       ^^ help: consider prefixing with an underscore: `_aa`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `aa`
[INFO] [stderr]   --> src/bin/hello.rs:19:7
[INFO] [stderr]    |
[INFO] [stderr] 19 | fn f3(aa: &mut HashMap<String, String>) {}
[INFO] [stderr]    |       ^^ help: consider prefixing with an underscore: `_aa`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `aa`
[INFO] [stderr]   --> src/bin/hello.rs:15:7
[INFO] [stderr]    |
[INFO] [stderr] 15 | fn f1(aa: HashMap<String, String>) {}
[INFO] [stderr]    |       ^^ help: consider prefixing with an underscore: `_aa`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `aa`
[INFO] [stderr]   --> src/bin/hello.rs:17:7
[INFO] [stderr]    |
[INFO] [stderr] 17 | fn f2(aa: &HashMap<String, String>) {}
[INFO] [stderr]    |       ^^ help: consider prefixing with an underscore: `_aa`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `bb`
[INFO] [stderr]   --> src/bin/hello.rs:23:13
[INFO] [stderr]    |
[INFO] [stderr] 23 |         let bb = &*aa;
[INFO] [stderr]    |             ^^ help: consider prefixing with an underscore: `_bb`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `bb`
[INFO] [stderr]   --> src/bin/hello.rs:29:17
[INFO] [stderr]    |
[INFO] [stderr] 29 |         let mut bb = &*aa;
[INFO] [stderr]    |                 ^^ help: consider prefixing with an underscore: `_bb`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `aa`
[INFO] [stderr]   --> src/bin/hello.rs:19:7
[INFO] [stderr]    |
[INFO] [stderr] 19 | fn f3(aa: &mut HashMap<String, String>) {}
[INFO] [stderr]    |       ^^ help: consider prefixing with an underscore: `_aa`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `bb`
[INFO] [stderr]   --> src/bin/hello.rs:23:13
[INFO] [stderr]    |
[INFO] [stderr] 23 |         let bb = &*aa;
[INFO] [stderr]    |             ^^ help: consider prefixing with an underscore: `_bb`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/bin/hello.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 |         let mut bb = &*aa;
[INFO] [stderr]    |             ----^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `bb`
[INFO] [stderr]   --> src/bin/hello.rs:29:17
[INFO] [stderr]    |
[INFO] [stderr] 29 |         let mut bb = &*aa;
[INFO] [stderr]    |                 ^^ help: consider prefixing with an underscore: `_bb`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `f2`
[INFO] [stderr]   --> src/bin/hello.rs:17:4
[INFO] [stderr]    |
[INFO] [stderr] 17 | fn f2(aa: &HashMap<String, String>) {}
[INFO] [stderr]    |    ^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `f3`
[INFO] [stderr]   --> src/bin/hello.rs:19:4
[INFO] [stderr]    |
[INFO] [stderr] 19 | fn f3(aa: &mut HashMap<String, String>) {}
[INFO] [stderr]    |    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `f4`
[INFO] [stderr]   --> src/bin/hello.rs:21:4
[INFO] [stderr]    |
[INFO] [stderr] 21 | fn f4(aa: *const HashMap<String, String>) {
[INFO] [stderr]    |    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `f5`
[INFO] [stderr]   --> src/bin/hello.rs:27:4
[INFO] [stderr]    |
[INFO] [stderr] 27 | fn f5(aa: *mut HashMap<String, String>) {
[INFO] [stderr]    |    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/bin/hello.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 |         let mut bb = &*aa;
[INFO] [stderr]    |             ----^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `f2`
[INFO] [stderr]   --> src/bin/hello.rs:17:4
[INFO] [stderr]    |
[INFO] [stderr] 17 | fn f2(aa: &HashMap<String, String>) {}
[INFO] [stderr]    |    ^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `f3`
[INFO] [stderr]   --> src/bin/hello.rs:19:4
[INFO] [stderr]    |
[INFO] [stderr] 19 | fn f3(aa: &mut HashMap<String, String>) {}
[INFO] [stderr]    |    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `f4`
[INFO] [stderr]   --> src/bin/hello.rs:21:4
[INFO] [stderr]    |
[INFO] [stderr] 21 | fn f4(aa: *const HashMap<String, String>) {
[INFO] [stderr]    |    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `f5`
[INFO] [stderr]   --> src/bin/hello.rs:27:4
[INFO] [stderr]    |
[INFO] [stderr] 27 | fn f5(aa: *mut HashMap<String, String>) {
[INFO] [stderr]    |    ^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 34.28s
[INFO] running `"docker" "inspect" "200683399cab02458ddc64c1577f8ba54e752e55188f97cf089757f475a7dd0d"`
[INFO] running `"docker" "rm" "-f" "200683399cab02458ddc64c1577f8ba54e752e55188f97cf089757f475a7dd0d"`
[INFO] [stdout] 200683399cab02458ddc64c1577f8ba54e752e55188f97cf089757f475a7dd0d