[INFO] fetching crate mutate_once 0.1.1...
[INFO] testing mutate_once-0.1.1 against try#d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2 for pr-86479
[INFO] extracting crate mutate_once 0.1.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate mutate_once 0.1.1 on toolchain d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mutate_once 0.1.1
[INFO] finished tweaking crates.io crate mutate_once 0.1.1
[INFO] tweaked toml for crates.io crate mutate_once 0.1.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 023da622be1ed7573de0e73215c1158b478a877bfe6f44836c989c0c3e80d905
[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" "023da622be1ed7573de0e73215c1158b478a877bfe6f44836c989c0c3e80d905", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "023da622be1ed7573de0e73215c1158b478a877bfe6f44836c989c0c3e80d905", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "023da622be1ed7573de0e73215c1158b478a877bfe6f44836c989c0c3e80d905", kill_on_drop: false }`
[INFO] [stdout] 023da622be1ed7573de0e73215c1158b478a877bfe6f44836c989c0c3e80d905
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=forbid" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 05146dfcf10a35ae299fb23aea048dd4d983e5a1e4994785f229ff94b7cda407
[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" "05146dfcf10a35ae299fb23aea048dd4d983e5a1e4994785f229ff94b7cda407", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling mutate_once v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.58s
[INFO] running `Command { std: "docker" "inspect" "05146dfcf10a35ae299fb23aea048dd4d983e5a1e4994785f229ff94b7cda407", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05146dfcf10a35ae299fb23aea048dd4d983e5a1e4994785f229ff94b7cda407", kill_on_drop: false }`
[INFO] [stdout] 05146dfcf10a35ae299fb23aea048dd4d983e5a1e4994785f229ff94b7cda407
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=forbid" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "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] 78f16c18aea31f8fd82e5a20f593679d6a4086ab883485ef8a34b5b5caf7db8c
[INFO] running `Command { std: "docker" "start" "-a" "78f16c18aea31f8fd82e5a20f593679d6a4086ab883485ef8a34b5b5caf7db8c", kill_on_drop: false }`
[INFO] [stderr]    Compiling mutate_once v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.69s
[INFO] running `Command { std: "docker" "inspect" "78f16c18aea31f8fd82e5a20f593679d6a4086ab883485ef8a34b5b5caf7db8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78f16c18aea31f8fd82e5a20f593679d6a4086ab883485ef8a34b5b5caf7db8c", kill_on_drop: false }`
[INFO] [stdout] 78f16c18aea31f8fd82e5a20f593679d6a4086ab883485ef8a34b5b5caf7db8c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=forbid" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d77300e718ad95de067a27ef27c1268047ed3b726143b60693efebdae1c2fde8
[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" "d77300e718ad95de067a27ef27c1268047ed3b726143b60693efebdae1c2fde8", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/mutate_once-06c0fe05630f51a1)
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test tests::default ... ok
[INFO] [stdout] test tests::from ... ok
[INFO] [stdout] test tests::into_inner ... ok
[INFO] [stdout] test tests::multiple_refs ... ok
[INFO] [stdout] test tests::repeated_muts ... ok
[INFO] [stdout] test tests::temporary_value ... ok
[INFO] [stdout] test tests::multiple_muts - should panic ... ok
[INFO] [stdout] test tests::mut_after_ref - should panic ... ok
[INFO] [stdout] test tests::ref_while_mut - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/getter.rs (/opt/rustwide/target/debug/deps/getter-8c8a0cabfa4af7e0)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test single ... ok
[INFO] [stdout] test collection ... 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 mutate_once
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test src/lib.rs - MutOnce<T>::get_mut (line 117) ... ok
[INFO] [stdout] test src/lib.rs - MutOnce<T>::get_mut (line 108) ... ok
[INFO] [stdout] test src/lib.rs - MutOnce<T>::get_ref (line 152) ... ok
[INFO] [stdout] test src/lib.rs - MutOnce<T>::get_ref (line 160) ... ok
[INFO] [stdout] test src/lib.rs - MutOnce<T>::get_mut (line 125) ... ok
[INFO] [stdout] test src/lib.rs - MutOnce (line 59) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.72s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d77300e718ad95de067a27ef27c1268047ed3b726143b60693efebdae1c2fde8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d77300e718ad95de067a27ef27c1268047ed3b726143b60693efebdae1c2fde8", kill_on_drop: false }`
[INFO] [stdout] d77300e718ad95de067a27ef27c1268047ed3b726143b60693efebdae1c2fde8