[INFO] fetching crate b_error 0.1.0...
[INFO] testing b_error-0.1.0 against 1.54.0 for beta-1.55-1
[INFO] extracting crate b_error 0.1.0 into /workspace/builds/worker-21/source
[INFO] validating manifest of crates.io crate b_error 0.1.0 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate b_error 0.1.0
[INFO] finished tweaking crates.io crate b_error 0.1.0
[INFO] tweaked toml for crates.io crate b_error 0.1.0 written to /workspace/builds/worker-21/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9476da3cb1f31698b2454c6317a38db4d0ebb2ced4c0f26f7584ff958bd475f7
[INFO] running `Command { std: "docker" "start" "-a" "9476da3cb1f31698b2454c6317a38db4d0ebb2ced4c0f26f7584ff958bd475f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9476da3cb1f31698b2454c6317a38db4d0ebb2ced4c0f26f7584ff958bd475f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9476da3cb1f31698b2454c6317a38db4d0ebb2ced4c0f26f7584ff958bd475f7", kill_on_drop: false }`
[INFO] [stdout] 9476da3cb1f31698b2454c6317a38db4d0ebb2ced4c0f26f7584ff958bd475f7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ad6a5bc9f1ea3cb03b7a5ed2f9b00bdecc67f5e1127cc031db836df18ad298bc
[INFO] running `Command { std: "docker" "start" "-a" "ad6a5bc9f1ea3cb03b7a5ed2f9b00bdecc67f5e1127cc031db836df18ad298bc", kill_on_drop: false }`
[INFO] [stderr]    Compiling b_error v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "ad6a5bc9f1ea3cb03b7a5ed2f9b00bdecc67f5e1127cc031db836df18ad298bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad6a5bc9f1ea3cb03b7a5ed2f9b00bdecc67f5e1127cc031db836df18ad298bc", kill_on_drop: false }`
[INFO] [stdout] ad6a5bc9f1ea3cb03b7a5ed2f9b00bdecc67f5e1127cc031db836df18ad298bc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 333b596384ea772aff71740b9fdb303ee49604aa2e7674b5ebd2b404f026e43f
[INFO] running `Command { std: "docker" "start" "-a" "333b596384ea772aff71740b9fdb303ee49604aa2e7674b5ebd2b404f026e43f", kill_on_drop: false }`
[INFO] [stderr]    Compiling b_error v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0599]: no method named `c` found for enum `Result` in the current scope
[INFO] [stdout]    --> error.rs:130:19
[INFO] [stdout]     |
[INFO] [stdout] 130 |         ret_s_t().c("test")?;
[INFO] [stdout]     |                   ^ method not found in `Result<(), TestError>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `c` found for enum `Result` in the current scope
[INFO] [stdout]    --> error.rs:131:19
[INFO] [stdout]     |
[INFO] [stdout] 131 |         ret_s_b().c("test")?;
[INFO] [stdout]     |                   ^ method not found in `Result<(), BError>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `b_error`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "333b596384ea772aff71740b9fdb303ee49604aa2e7674b5ebd2b404f026e43f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "333b596384ea772aff71740b9fdb303ee49604aa2e7674b5ebd2b404f026e43f", kill_on_drop: false }`
[INFO] [stdout] 333b596384ea772aff71740b9fdb303ee49604aa2e7674b5ebd2b404f026e43f
