[INFO] fetching crate yttrium_std_guild 0.1.0...
[INFO] testing yttrium_std_guild-0.1.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate yttrium_std_guild 0.1.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate yttrium_std_guild 0.1.0 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 yttrium_std_guild 0.1.0
[INFO] finished tweaking crates.io crate yttrium_std_guild 0.1.0
[INFO] tweaked toml for crates.io crate yttrium_std_guild 0.1.0 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] a5c82d103b7d2c3cc896ad90369a1026ce0a1000bbd75fd9ad6955ee56c3ed63
[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" "a5c82d103b7d2c3cc896ad90369a1026ce0a1000bbd75fd9ad6955ee56c3ed63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a5c82d103b7d2c3cc896ad90369a1026ce0a1000bbd75fd9ad6955ee56c3ed63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a5c82d103b7d2c3cc896ad90369a1026ce0a1000bbd75fd9ad6955ee56c3ed63", kill_on_drop: false }`
[INFO] [stdout] a5c82d103b7d2c3cc896ad90369a1026ce0a1000bbd75fd9ad6955ee56c3ed63
[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] f2061b26f5951880ef01c9d5515277dba1201784e25d8703e08df54f9929c18c
[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" "f2061b26f5951880ef01c9d5515277dba1201784e25d8703e08df54f9929c18c", kill_on_drop: false }`
[INFO] [stderr]    Compiling yttrium_std_guild v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.25s
[INFO] running `Command { std: "docker" "inspect" "f2061b26f5951880ef01c9d5515277dba1201784e25d8703e08df54f9929c18c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2061b26f5951880ef01c9d5515277dba1201784e25d8703e08df54f9929c18c", kill_on_drop: false }`
[INFO] [stdout] f2061b26f5951880ef01c9d5515277dba1201784e25d8703e08df54f9929c18c
[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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d8c5b0208e4792cc287a86895f4645db4cdb9cee29cf0a363498ff2e06a5ce9e
[INFO] running `Command { std: "docker" "start" "-a" "d8c5b0208e4792cc287a86895f4645db4cdb9cee29cf0a363498ff2e06a5ce9e", kill_on_drop: false }`
[INFO] [stderr]    Compiling yttrium_std_guild v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.12s
[INFO] running `Command { std: "docker" "inspect" "d8c5b0208e4792cc287a86895f4645db4cdb9cee29cf0a363498ff2e06a5ce9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8c5b0208e4792cc287a86895f4645db4cdb9cee29cf0a363498ff2e06a5ce9e", kill_on_drop: false }`
[INFO] [stdout] d8c5b0208e4792cc287a86895f4645db4cdb9cee29cf0a363498ff2e06a5ce9e
[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] [stdout] e6dbaeb90e86c7ace9f1ec535cc1ac703f52b5897987d91ce526c6b7584bf6de
[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" "e6dbaeb90e86c7ace9f1ec535cc1ac703f52b5897987d91ce526c6b7584bf6de", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.30s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/yttrium_std_guild-f2e2e3a67a53ce7e
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests yttrium_std_guild
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[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
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e6dbaeb90e86c7ace9f1ec535cc1ac703f52b5897987d91ce526c6b7584bf6de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6dbaeb90e86c7ace9f1ec535cc1ac703f52b5897987d91ce526c6b7584bf6de", kill_on_drop: false }`
[INFO] [stdout] e6dbaeb90e86c7ace9f1ec535cc1ac703f52b5897987d91ce526c6b7584bf6de