[INFO] updating cached repository https://github.com/NichtsVonChaos/japanese_mahjong_theory
[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] [stderr] From https://github.com/NichtsVonChaos/japanese_mahjong_theory
[INFO] [stderr]    a68f9c2..4734bdd  master     -> master
[INFO] [stderr]  * [new tag]         1.1        -> 1.1
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4734bdd017a67aa9dd300fa072a2f00ecb8611ad
[INFO] checking NichtsVonChaos/japanese_mahjong_theory against try#13f916f63bc6575d5ff1f989237dfabe88981368 for pr-69880
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNichtsVonChaos%2Fjapanese_mahjong_theory" "/workspace/builds/worker-14/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/NichtsVonChaos/japanese_mahjong_theory on toolchain 13f916f63bc6575d5ff1f989237dfabe88981368
[INFO] running `"/workspace/cargo-home/bin/cargo" "+13f916f63bc6575d5ff1f989237dfabe88981368" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/NichtsVonChaos/japanese_mahjong_theory
[INFO] finished tweaking git repo https://github.com/NichtsVonChaos/japanese_mahjong_theory
[INFO] tweaked toml for git repo https://github.com/NichtsVonChaos/japanese_mahjong_theory written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/NichtsVonChaos/japanese_mahjong_theory already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+13f916f63bc6575d5ff1f989237dfabe88981368" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+13f916f63bc6575d5ff1f989237dfabe88981368" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 1653e040f1c1ce0adc71a31d79f63c9c2c4e110824ee591e1aada48407b127a8
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "1653e040f1c1ce0adc71a31d79f63c9c2c4e110824ee591e1aada48407b127a8"`
[INFO] [stderr]     Checking error-chain v0.10.0
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking mut_static v5.0.0
[INFO] [stderr]     Checking japanese_mahjong_theory v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `op`
[INFO] [stderr]    --> src/game.rs:477:22
[INFO] [stderr]     |
[INFO] [stderr] 477 |         if let Some((op, state)) = self.operation_stack.pop() {}
[INFO] [stderr]     |                      ^^ help: consider prefixing with an underscore: `_op`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `state`
[INFO] [stderr]    --> src/game.rs:477:26
[INFO] [stderr]     |
[INFO] [stderr] 477 |         if let Some((op, state)) = self.operation_stack.pop() {}
[INFO] [stderr]     |                          ^^^^^ help: consider prefixing with an underscore: `_state`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `op`
[INFO] [stderr]    --> src/game.rs:477:22
[INFO] [stderr]     |
[INFO] [stderr] 477 |         if let Some((op, state)) = self.operation_stack.pop() {}
[INFO] [stderr]     |                      ^^ help: consider prefixing with an underscore: `_op`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `state`
[INFO] [stderr]    --> src/game.rs:477:26
[INFO] [stderr]     |
[INFO] [stderr] 477 |         if let Some((op, state)) = self.operation_stack.pop() {}
[INFO] [stderr]     |                          ^^^^^ help: consider prefixing with an underscore: `_state`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `back`
[INFO] [stderr]    --> src/game.rs:476:5
[INFO] [stderr]     |
[INFO] [stderr] 476 |     pub fn back(&mut self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `back`
[INFO] [stderr]    --> src/game.rs:476:5
[INFO] [stderr]     |
[INFO] [stderr] 476 |     pub fn back(&mut self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.00s
[INFO] running `"docker" "inspect" "1653e040f1c1ce0adc71a31d79f63c9c2c4e110824ee591e1aada48407b127a8"`
[INFO] running `"docker" "rm" "-f" "1653e040f1c1ce0adc71a31d79f63c9c2c4e110824ee591e1aada48407b127a8"`
[INFO] [stdout] 1653e040f1c1ce0adc71a31d79f63c9c2c4e110824ee591e1aada48407b127a8