[INFO] fetching crate discretionary 0.1.0...
[INFO] testing discretionary-0.1.0 against 1.59.0 for beta-1.60-1
[INFO] extracting crate discretionary 0.1.0 into /workspace/builds/worker-28/source
[INFO] validating manifest of crates.io crate discretionary 0.1.0 on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate discretionary 0.1.0
[INFO] finished tweaking crates.io crate discretionary 0.1.0
[INFO] tweaked toml for crates.io crate discretionary 0.1.0 written to /workspace/builds/worker-28/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "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-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9165f076feadd902e1a0342c27ff3ac8d2891d8cc731f6ccd64c23f68c341320
[INFO] running `Command { std: "docker" "start" "-a" "9165f076feadd902e1a0342c27ff3ac8d2891d8cc731f6ccd64c23f68c341320", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9165f076feadd902e1a0342c27ff3ac8d2891d8cc731f6ccd64c23f68c341320", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9165f076feadd902e1a0342c27ff3ac8d2891d8cc731f6ccd64c23f68c341320", kill_on_drop: false }`
[INFO] [stdout] 9165f076feadd902e1a0342c27ff3ac8d2891d8cc731f6ccd64c23f68c341320
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8ff2959165c740ad5115248dbca3652181446360b068f2b8c08bc52a70da385e
[INFO] running `Command { std: "docker" "start" "-a" "8ff2959165c740ad5115248dbca3652181446360b068f2b8c08bc52a70da385e", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling discretionary v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.71s
[INFO] running `Command { std: "docker" "inspect" "8ff2959165c740ad5115248dbca3652181446360b068f2b8c08bc52a70da385e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ff2959165c740ad5115248dbca3652181446360b068f2b8c08bc52a70da385e", kill_on_drop: false }`
[INFO] [stdout] 8ff2959165c740ad5115248dbca3652181446360b068f2b8c08bc52a70da385e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0bd37744e428d73629ddb1f03ed0ed28d2dffe0a9a69d75aa0c508a387ed7295
[INFO] running `Command { std: "docker" "start" "-a" "0bd37744e428d73629ddb1f03ed0ed28d2dffe0a9a69d75aa0c508a387ed7295", kill_on_drop: false }`
[INFO] [stderr]    Compiling discretionary v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.38s
[INFO] running `Command { std: "docker" "inspect" "0bd37744e428d73629ddb1f03ed0ed28d2dffe0a9a69d75aa0c508a387ed7295", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0bd37744e428d73629ddb1f03ed0ed28d2dffe0a9a69d75aa0c508a387ed7295", kill_on_drop: false }`
[INFO] [stdout] 0bd37744e428d73629ddb1f03ed0ed28d2dffe0a9a69d75aa0c508a387ed7295
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 33a81b91820b851c95127cbf2b2d11785fb2ed894df19f570e3abdce4ae549da
[INFO] running `Command { std: "docker" "start" "-a" "33a81b91820b851c95127cbf2b2d11785fb2ed894df19f570e3abdce4ae549da", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/discretionary-d54cd5b9c4da97e8)
[INFO] [stdout] 
[INFO] [stderr]      Running tests/test_basic.rs (/opt/rustwide/target/debug/deps/test_basic-9d6ee2d74fa3fbff)
[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 4 tests
[INFO] [stdout] test test_generic ... ok
[INFO] [stdout] test test_named ... ok
[INFO] [stdout] test test_unit ... ok
[INFO] [stdout] test test_unnamed ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests discretionary
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test src/lib.rs - make_optional (line 13) ... ok
[INFO] [stdout] test src/lib.rs - make_optional (line 25) ... ok
[INFO] [stdout] test src/lib.rs - (line 29) ... ok
[INFO] [stdout] test src/lib.rs - (line 41) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.16s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "33a81b91820b851c95127cbf2b2d11785fb2ed894df19f570e3abdce4ae549da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33a81b91820b851c95127cbf2b2d11785fb2ed894df19f570e3abdce4ae549da", kill_on_drop: false }`
[INFO] [stdout] 33a81b91820b851c95127cbf2b2d11785fb2ed894df19f570e3abdce4ae549da