[INFO] fetching crate describe_err 1.0.0...
[INFO] testing describe_err-1.0.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate describe_err 1.0.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate describe_err 1.0.0 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate describe_err 1.0.0
[INFO] finished tweaking crates.io crate describe_err 1.0.0
[INFO] tweaked toml for crates.io crate describe_err 1.0.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 682c8c53dca82c52527afa755baaecf64ab08c06a17df31e8be917b0d783e81f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "682c8c53dca82c52527afa755baaecf64ab08c06a17df31e8be917b0d783e81f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "682c8c53dca82c52527afa755baaecf64ab08c06a17df31e8be917b0d783e81f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "682c8c53dca82c52527afa755baaecf64ab08c06a17df31e8be917b0d783e81f", kill_on_drop: false }`
[INFO] [stdout] 682c8c53dca82c52527afa755baaecf64ab08c06a17df31e8be917b0d783e81f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 011fbda85cf4ff6075c24d51e76af86cba77b5bcea835979ea637c3a814ebcc5
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "011fbda85cf4ff6075c24d51e76af86cba77b5bcea835979ea637c3a814ebcc5", kill_on_drop: false }`
[INFO] [stderr]    Compiling thiserror-impl v1.0.23
[INFO] [stderr]    Compiling thiserror v1.0.23
[INFO] [stderr]    Compiling describe_err v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.53s
[INFO] running `Command { std: "docker" "inspect" "011fbda85cf4ff6075c24d51e76af86cba77b5bcea835979ea637c3a814ebcc5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "011fbda85cf4ff6075c24d51e76af86cba77b5bcea835979ea637c3a814ebcc5", kill_on_drop: false }`
[INFO] [stdout] 011fbda85cf4ff6075c24d51e76af86cba77b5bcea835979ea637c3a814ebcc5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] baa68d4a810f4a9a82ec9612212070522acbe1f1d4ef05cbec14a3ecaf2537b7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "baa68d4a810f4a9a82ec9612212070522acbe1f1d4ef05cbec14a3ecaf2537b7", kill_on_drop: false }`
[INFO] [stderr]    Compiling describe_err v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.27s
[INFO] running `Command { std: "docker" "inspect" "baa68d4a810f4a9a82ec9612212070522acbe1f1d4ef05cbec14a3ecaf2537b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "baa68d4a810f4a9a82ec9612212070522acbe1f1d4ef05cbec14a3ecaf2537b7", kill_on_drop: false }`
[INFO] [stdout] baa68d4a810f4a9a82ec9612212070522acbe1f1d4ef05cbec14a3ecaf2537b7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 8c9e111234b5ed6caa4feb3836ce658f2fbb7ec3c6626153ba2aeca0f70852f8
[INFO] running `Command { std: "docker" "start" "-a" "8c9e111234b5ed6caa4feb3836ce658f2fbb7ec3c6626153ba2aeca0f70852f8", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/describe_err-9f9087340904a64e
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test tests::simple_error ... ok
[INFO] [stdout] test tests::macro_err ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests describe_err
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test src/lib.rs - (line 18) ... ok
[INFO] [stdout] test src/lib.rs - (line 7) ... ok
[INFO] [stdout] test src/lib.rs - describing (line 122) ... ok
[INFO] [stdout] test src/lib.rs - Described (line 67) ... ok
[INFO] [stdout] test src/lib.rs - describe (line 108) ... ok
[INFO] [stdout] test src/lib.rs - (line 38) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "8c9e111234b5ed6caa4feb3836ce658f2fbb7ec3c6626153ba2aeca0f70852f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c9e111234b5ed6caa4feb3836ce658f2fbb7ec3c6626153ba2aeca0f70852f8", kill_on_drop: false }`
[INFO] [stdout] 8c9e111234b5ed6caa4feb3836ce658f2fbb7ec3c6626153ba2aeca0f70852f8