[INFO] fetching crate string 0.2.1...
[INFO] testing string-0.2.1 against 1.55.0 for beta-1.56-1
[INFO] extracting crate string 0.2.1 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate string 0.2.1 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 string 0.2.1
[INFO] finished tweaking crates.io crate string 0.2.1
[INFO] tweaked toml for crates.io crate string 0.2.1 written to /workspace/builds/worker-2/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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] eca272213ebb78314e10c7f8f7ead0fce5ee5c9050467319e8b30931d6fef65b
[INFO] running `Command { std: "docker" "start" "-a" "eca272213ebb78314e10c7f8f7ead0fce5ee5c9050467319e8b30931d6fef65b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eca272213ebb78314e10c7f8f7ead0fce5ee5c9050467319e8b30931d6fef65b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eca272213ebb78314e10c7f8f7ead0fce5ee5c9050467319e8b30931d6fef65b", kill_on_drop: false }`
[INFO] [stdout] eca272213ebb78314e10c7f8f7ead0fce5ee5c9050467319e8b30931d6fef65b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 554e249689fa2af3551f27b934315578d6813998a1fff24b197d4f9df88eab21
[INFO] running `Command { std: "docker" "start" "-a" "554e249689fa2af3551f27b934315578d6813998a1fff24b197d4f9df88eab21", kill_on_drop: false }`
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling string v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.05s
[INFO] running `Command { std: "docker" "inspect" "554e249689fa2af3551f27b934315578d6813998a1fff24b197d4f9df88eab21", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "554e249689fa2af3551f27b934315578d6813998a1fff24b197d4f9df88eab21", kill_on_drop: false }`
[INFO] [stdout] 554e249689fa2af3551f27b934315578d6813998a1fff24b197d4f9df88eab21
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 111b7bdadda15396ec98fc609ec3bcb2ba6dec29db8a4015b4c431fb2a783916
[INFO] running `Command { std: "docker" "start" "-a" "111b7bdadda15396ec98fc609ec3bcb2ba6dec29db8a4015b4c431fb2a783916", kill_on_drop: false }`
[INFO] [stderr]    Compiling string v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.74s
[INFO] running `Command { std: "docker" "inspect" "111b7bdadda15396ec98fc609ec3bcb2ba6dec29db8a4015b4c431fb2a783916", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "111b7bdadda15396ec98fc609ec3bcb2ba6dec29db8a4015b4c431fb2a783916", kill_on_drop: false }`
[INFO] [stdout] 111b7bdadda15396ec98fc609ec3bcb2ba6dec29db8a4015b4c431fb2a783916
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] d9cfad3868afe3365087f8200d107b7a20f9e4fec2342f8f1fec9ca2c4fa89d6
[INFO] running `Command { std: "docker" "start" "-a" "d9cfad3868afe3365087f8200d107b7a20f9e4fec2342f8f1fec9ca2c4fa89d6", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/string-0bbbf2ce39ef3074)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test test::test_from_std_string ... ok
[INFO] [stdout] test test::test_try_from_bytes ... ok
[INFO] [stderr]    Doc-tests string
[INFO] [stdout] test test::test_from_str ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test src/lib.rs - String<T>::get_ref (line 48) ... ok
[INFO] [stdout] test src/lib.rs - String<T>::get_mut (line 64) ... ok
[INFO] [stdout] test src/lib.rs - String<T>::into_inner (line 80) ... ok
[INFO] [stdout] test src/lib.rs - String<T>::from_str (line 93) ... ok
[INFO] [stdout] test src/lib.rs - String::new (line 114) ... ok
[INFO] [stdout] test src/lib.rs - (line 14) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.69s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d9cfad3868afe3365087f8200d107b7a20f9e4fec2342f8f1fec9ca2c4fa89d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9cfad3868afe3365087f8200d107b7a20f9e4fec2342f8f1fec9ca2c4fa89d6", kill_on_drop: false }`
[INFO] [stdout] d9cfad3868afe3365087f8200d107b7a20f9e4fec2342f8f1fec9ca2c4fa89d6