[INFO] updating cached repository https://github.com/silversupreme/reckon
[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] 1f31eb6ef6455b21d35fac53fbb4470315d5100f
[INFO] checking silversupreme/reckon against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsilversupreme%2Freckon" "/workspace/builds/worker-12/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/silversupreme/reckon on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/silversupreme/reckon
[INFO] finished tweaking git repo https://github.com/silversupreme/reckon
[INFO] tweaked toml for git repo https://github.com/silversupreme/reckon written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/silversupreme/reckon already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+45d050cde277b22a755847338f2acc2c7b834141" "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] 403da0cf53594831858c8591a5c945ce38860fbc01f515c2aae23064867387a9
[INFO] running `"docker" "start" "-a" "403da0cf53594831858c8591a5c945ce38860fbc01f515c2aae23064867387a9"`
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking thread_local v0.2.7
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]     Checking regex v0.1.80
[INFO] [stderr]     Checking reckon v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0599]: no method named `chars` found for mutable reference `&mut std::process::ChildStdout` in the current scope
[INFO] [stderr]    --> src/base.rs:154:28
[INFO] [stderr]     |
[INFO] [stderr] 154 |         let mut c = stdout.chars();
[INFO] [stderr]     |                            ^^^^^ method not found in `&mut std::process::ChildStdout`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0599`.
[INFO] [stderr] error: could not compile `reckon`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0599]: no method named `chars` found for mutable reference `&mut std::process::ChildStdout` in the current scope
[INFO] [stderr]    --> src/base.rs:154:28
[INFO] [stderr]     |
[INFO] [stderr] 154 |         let mut c = stdout.chars();
[INFO] [stderr]     |                            ^^^^^ method not found in `&mut std::process::ChildStdout`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0599`.
[INFO] [stderr] error: could not compile `reckon`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "403da0cf53594831858c8591a5c945ce38860fbc01f515c2aae23064867387a9"`
[INFO] running `"docker" "rm" "-f" "403da0cf53594831858c8591a5c945ce38860fbc01f515c2aae23064867387a9"`
[INFO] [stdout] 403da0cf53594831858c8591a5c945ce38860fbc01f515c2aae23064867387a9