[INFO] crate generic-channel 0.2.0 is already in cache
[INFO] testing generic-channel-0.2.0 against 1.38.0 for beta-1.39-1
[INFO] extracting crate generic-channel 0.2.0 into work/builds/worker-4/source
[INFO] validating manifest of crates.io crate generic-channel 0.2.0 on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate generic-channel 0.2.0
[INFO] finished tweaking crates.io crate generic-channel 0.2.0
[INFO] tweaked toml for crates.io crate generic-channel 0.2.0 written to work/builds/worker-4/source/Cargo.toml
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] 88dc1f08b64a424372bba939952b7aceed39a386cb04b17e76e62e78b518ae76
[INFO] running `"docker" "start" "-a" "88dc1f08b64a424372bba939952b7aceed39a386cb04b17e76e62e78b518ae76"`
[INFO] [stderr]    Compiling generic-channel v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.19s
[INFO] running `"docker" "inspect" "88dc1f08b64a424372bba939952b7aceed39a386cb04b17e76e62e78b518ae76"`
[INFO] running `"docker" "rm" "-f" "88dc1f08b64a424372bba939952b7aceed39a386cb04b17e76e62e78b518ae76"`
[INFO] [stdout] 88dc1f08b64a424372bba939952b7aceed39a386cb04b17e76e62e78b518ae76
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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" "+1.38.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 4677390349b9eb4452ff7f2a5830967ad2e7427ed4d19de3140f2e816c14fd88
[INFO] running `"docker" "start" "-a" "4677390349b9eb4452ff7f2a5830967ad2e7427ed4d19de3140f2e816c14fd88"`
[INFO] [stderr]    Compiling generic-channel v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0596]: cannot borrow `*sender` as mutable, as `sender` is not declared as mutable
[INFO] [stderr]   --> src/lib.rs:54:9
[INFO] [stderr]    |
[INFO] [stderr] 53 |         let sender: Box<dyn Sender<u8>> = Box::new(sender);
[INFO] [stderr]    |             ------ help: consider changing this to be mutable: `mut sender`
[INFO] [stderr] 54 |         sender.try_send(1).expect("send");
[INFO] [stderr]    |         ^^^^^^ cannot borrow as mutable
[INFO] [stderr] 
[INFO] [stderr] error[E0596]: cannot borrow `*sender` as mutable, as `sender` is not declared as mutable
[INFO] [stderr]   --> src/lib.rs:57:20
[INFO] [stderr]    |
[INFO] [stderr] 53 |         let sender: Box<dyn Sender<u8>> = Box::new(sender);
[INFO] [stderr]    |             ------ help: consider changing this to be mutable: `mut sender`
[INFO] [stderr] ...
[INFO] [stderr] 57 |         assert_eq!(sender.try_send(2), Err(TrySendError::Disconnected(2u8)));
[INFO] [stderr]    |                    ^^^^^^ cannot borrow as mutable
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0596`.
[INFO] [stderr] error: Could not compile `generic-channel`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "4677390349b9eb4452ff7f2a5830967ad2e7427ed4d19de3140f2e816c14fd88"`
[INFO] running `"docker" "rm" "-f" "4677390349b9eb4452ff7f2a5830967ad2e7427ed4d19de3140f2e816c14fd88"`
[INFO] [stdout] 4677390349b9eb4452ff7f2a5830967ad2e7427ed4d19de3140f2e816c14fd88