[INFO] fetching crate mwt 0.3.0...
[INFO] testing mwt-0.3.0 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate mwt 0.3.0 into /workspace/builds/worker-89/source
[INFO] validating manifest of crates.io crate mwt 0.3.0 on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mwt 0.3.0
[INFO] finished tweaking crates.io crate mwt 0.3.0
[INFO] tweaked toml for crates.io crate mwt 0.3.0 written to /workspace/builds/worker-89/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "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" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5185be4611a62f26be414eb9cd4efb1f939dd97172cfb03e2000181a550f13f0
[INFO] running `Command { std: "docker" "start" "-a" "5185be4611a62f26be414eb9cd4efb1f939dd97172cfb03e2000181a550f13f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5185be4611a62f26be414eb9cd4efb1f939dd97172cfb03e2000181a550f13f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5185be4611a62f26be414eb9cd4efb1f939dd97172cfb03e2000181a550f13f0", kill_on_drop: false }`
[INFO] [stdout] 5185be4611a62f26be414eb9cd4efb1f939dd97172cfb03e2000181a550f13f0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d198ed20b554a0eef0b82edf334a168338f7dc85cfe3cd5e5aec2caee94d9c5d
[INFO] running `Command { std: "docker" "start" "-a" "d198ed20b554a0eef0b82edf334a168338f7dc85cfe3cd5e5aec2caee94d9c5d", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.37
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling mwt v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.13s
[INFO] running `Command { std: "docker" "inspect" "d198ed20b554a0eef0b82edf334a168338f7dc85cfe3cd5e5aec2caee94d9c5d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d198ed20b554a0eef0b82edf334a168338f7dc85cfe3cd5e5aec2caee94d9c5d", kill_on_drop: false }`
[INFO] [stdout] d198ed20b554a0eef0b82edf334a168338f7dc85cfe3cd5e5aec2caee94d9c5d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d12261a61351e5f159f9bf61141e4f7553c3f6541612d9e9c42eb898c6ff0b0b
[INFO] running `Command { std: "docker" "start" "-a" "d12261a61351e5f159f9bf61141e4f7553c3f6541612d9e9c42eb898c6ff0b0b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling mwt v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.24s
[INFO] [stderr]   Executable unittests src/lib.rs (/opt/rustwide/target/debug/deps/mwt-8bec601fb9708574)
[INFO] [stderr]   Executable tests/maybe_mut.rs (/opt/rustwide/target/debug/deps/maybe_mut-fcdd732e57308318)
[INFO] running `Command { std: "docker" "inspect" "d12261a61351e5f159f9bf61141e4f7553c3f6541612d9e9c42eb898c6ff0b0b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d12261a61351e5f159f9bf61141e4f7553c3f6541612d9e9c42eb898c6ff0b0b", kill_on_drop: false }`
[INFO] [stdout] d12261a61351e5f159f9bf61141e4f7553c3f6541612d9e9c42eb898c6ff0b0b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 9262ab2231736759492ff6a8cf62120540deb61791030e489af4721b86665b90
[INFO] running `Command { std: "docker" "start" "-a" "9262ab2231736759492ff6a8cf62120540deb61791030e489af4721b86665b90", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/mwt-8bec601fb9708574)
[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] [stderr]      Running tests/maybe_mut.rs (/opt/rustwide/target/debug/deps/maybe_mut-fcdd732e57308318)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test simple_test ... ok
[INFO] [stdout] test struct_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests mwt
[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" "9262ab2231736759492ff6a8cf62120540deb61791030e489af4721b86665b90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9262ab2231736759492ff6a8cf62120540deb61791030e489af4721b86665b90", kill_on_drop: false }`
[INFO] [stdout] 9262ab2231736759492ff6a8cf62120540deb61791030e489af4721b86665b90