[INFO] fetching crate cp437 0.1.1...
[INFO] testing cp437-0.1.1 against 1.55.0 for beta-1.56-1
[INFO] extracting crate cp437 0.1.1 into /workspace/builds/worker-93/source
[INFO] validating manifest of crates.io crate cp437 0.1.1 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cp437 0.1.1
[INFO] finished tweaking crates.io crate cp437 0.1.1
[INFO] tweaked toml for crates.io crate cp437 0.1.1 written to /workspace/builds/worker-93/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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-93/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-93/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5b5a16de999db2038dfb0de4ff758edf7366a75534c055bf8494c0b4b55c28c6
[INFO] running `Command { std: "docker" "start" "-a" "5b5a16de999db2038dfb0de4ff758edf7366a75534c055bf8494c0b4b55c28c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5b5a16de999db2038dfb0de4ff758edf7366a75534c055bf8494c0b4b55c28c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b5a16de999db2038dfb0de4ff758edf7366a75534c055bf8494c0b4b55c28c6", kill_on_drop: false }`
[INFO] [stdout] 5b5a16de999db2038dfb0de4ff758edf7366a75534c055bf8494c0b4b55c28c6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-93/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-93/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2581a0e624990f12b9c9a87788e9544aa86139b2231f288b05300386400b485f
[INFO] running `Command { std: "docker" "start" "-a" "2581a0e624990f12b9c9a87788e9544aa86139b2231f288b05300386400b485f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling cp437 v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/reader.rs:23:10
[INFO] [stdout]    |
[INFO] [stdout] 23 |                     Err(e) => None
[INFO] [stdout]    |                         ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.14s
[INFO] running `Command { std: "docker" "inspect" "2581a0e624990f12b9c9a87788e9544aa86139b2231f288b05300386400b485f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2581a0e624990f12b9c9a87788e9544aa86139b2231f288b05300386400b485f", kill_on_drop: false }`
[INFO] [stdout] 2581a0e624990f12b9c9a87788e9544aa86139b2231f288b05300386400b485f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-93/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-93/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 242e44e736bc5edc6c295d38b6ab36aa6d019df57cc1e3065b6c7b40d2b7bec6
[INFO] running `Command { std: "docker" "start" "-a" "242e44e736bc5edc6c295d38b6ab36aa6d019df57cc1e3065b6c7b40d2b7bec6", kill_on_drop: false }`
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/reader.rs:23:10
[INFO] [stdout]    |
[INFO] [stdout] 23 |                     Err(e) => None
[INFO] [stdout]    |                         ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling cp437 v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/reader.rs:23:10
[INFO] [stdout]    |
[INFO] [stdout] 23 |                     Err(e) => None
[INFO] [stdout]    |                         ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `Command { std: "docker" "inspect" "242e44e736bc5edc6c295d38b6ab36aa6d019df57cc1e3065b6c7b40d2b7bec6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "242e44e736bc5edc6c295d38b6ab36aa6d019df57cc1e3065b6c7b40d2b7bec6", kill_on_drop: false }`
[INFO] [stdout] 242e44e736bc5edc6c295d38b6ab36aa6d019df57cc1e3065b6c7b40d2b7bec6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-93/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-93/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b21e4e0e42a7c692c3cb5618a7e6a09e7fe19569ccb06bc4fe9e3f55d19719ba
[INFO] running `Command { std: "docker" "start" "-a" "b21e4e0e42a7c692c3cb5618a7e6a09e7fe19569ccb06bc4fe9e3f55d19719ba", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/reader.rs:23:10
[INFO] [stderr]    |
[INFO] [stderr] 23 |                     Err(e) => None
[INFO] [stderr]    |                         ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `cp437` (lib) generated 1 warning
[INFO] [stderr] warning: `cp437` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/cp437-8402cf44642bcd4f)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests cp437
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b21e4e0e42a7c692c3cb5618a7e6a09e7fe19569ccb06bc4fe9e3f55d19719ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b21e4e0e42a7c692c3cb5618a7e6a09e7fe19569ccb06bc4fe9e3f55d19719ba", kill_on_drop: false }`
[INFO] [stdout] b21e4e0e42a7c692c3cb5618a7e6a09e7fe19569ccb06bc4fe9e3f55d19719ba