[INFO] fetching crate free-algebra 0.1.0...
[INFO] testing free-algebra-0.1.0 against master#8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e for pr-74409
[INFO] extracting crate free-algebra 0.1.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate free-algebra 0.1.0 on toolchain 8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate free-algebra 0.1.0
[INFO] finished tweaking crates.io crate free-algebra 0.1.0
[INFO] tweaked toml for crates.io crate free-algebra 0.1.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded maths-traits v0.2.1
[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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b4a383137a067c81d0e3c206d9092c25d69539c34ee058474f71d131884c491b
[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" "b4a383137a067c81d0e3c206d9092c25d69539c34ee058474f71d131884c491b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b4a383137a067c81d0e3c206d9092c25d69539c34ee058474f71d131884c491b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4a383137a067c81d0e3c206d9092c25d69539c34ee058474f71d131884c491b", kill_on_drop: false }`
[INFO] [stdout] b4a383137a067c81d0e3c206d9092c25d69539c34ee058474f71d131884c491b
[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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 028741d2ec7cfc9c1b9aef8807fd3d821dd262dc962ad3098bca6d6313fe9d3c
[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" "028741d2ec7cfc9c1b9aef8807fd3d821dd262dc962ad3098bca6d6313fe9d3c", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling derivative v1.0.4
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling maths-traits v0.2.1
[INFO] [stderr]    Compiling free-algebra v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]   --> src/lib.rs:77:12
[INFO] [stdout]    |
[INFO] [stdout] 77 | #![feature(specialization)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout]    = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.32s
[INFO] running `Command { std: "docker" "inspect" "028741d2ec7cfc9c1b9aef8807fd3d821dd262dc962ad3098bca6d6313fe9d3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "028741d2ec7cfc9c1b9aef8807fd3d821dd262dc962ad3098bca6d6313fe9d3c", kill_on_drop: false }`
[INFO] [stdout] 028741d2ec7cfc9c1b9aef8807fd3d821dd262dc962ad3098bca6d6313fe9d3c
[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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] afe7469fbaaf9b20b5e8f1600c33cf6ddfc68e93511ca37cb67e81eee1831a3e
[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" "afe7469fbaaf9b20b5e8f1600c33cf6ddfc68e93511ca37cb67e81eee1831a3e", kill_on_drop: false }`
[INFO] [stderr]    Compiling free-algebra v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]   --> src/lib.rs:77:12
[INFO] [stdout]    |
[INFO] [stdout] 77 | #![feature(specialization)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout]    = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]   --> src/lib.rs:77:12
[INFO] [stdout]    |
[INFO] [stdout] 77 | #![feature(specialization)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout]    = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.40s
[INFO] running `Command { std: "docker" "inspect" "afe7469fbaaf9b20b5e8f1600c33cf6ddfc68e93511ca37cb67e81eee1831a3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "afe7469fbaaf9b20b5e8f1600c33cf6ddfc68e93511ca37cb67e81eee1831a3e", kill_on_drop: false }`
[INFO] [stdout] afe7469fbaaf9b20b5e8f1600c33cf6ddfc68e93511ca37cb67e81eee1831a3e
[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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5302b469eda4db8299fae844a957ea97d09d3f515a472d7fa55e5b6c47025168
[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" "5302b469eda4db8299fae844a957ea97d09d3f515a472d7fa55e5b6c47025168", kill_on_drop: false }`
[INFO] [stderr] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stderr]   --> src/lib.rs:77:12
[INFO] [stderr]    |
[INFO] [stderr] 77 | #![feature(specialization)]
[INFO] [stderr]    |            ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(incomplete_features)]` on by default
[INFO] [stderr]    = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stderr]   --> src/lib.rs:77:12
[INFO] [stderr]    |
[INFO] [stderr] 77 | #![feature(specialization)]
[INFO] [stderr]    |            ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(incomplete_features)]` on by default
[INFO] [stderr]    = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/free_algebra-a250a84ab061de5b
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests free-algebra
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stderr]   --> /opt/rustwide/workdir/src/lib.rs:77:12
[INFO] [stderr]    |
[INFO] [stderr] 77 | #![feature(specialization)]
[INFO] [stderr]    |            ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(incomplete_features)]` on by default
[INFO] [stderr]    = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stdout] running 26 tests
[INFO] [stdout] test src/monoid.rs - monoid::MonoidalString<C, M> (line 96) ... ok
[INFO] [stdout] test src/monoid.rs - monoid::MonoidalString<C, M>::commutator (line 321) ... ok
[INFO] [stdout] test src/monoid.rs - monoid::MonoidalString<C, M> (line 124) ... ok
[INFO] [stdout] test src/module.rs - module::ModuleString<R, T, A>::len (line 236) ... ok
[INFO] [stdout] test src/lib.rs - (line 21) ... ok
[INFO] [stdout] test src/monoid.rs - monoid::MonoidalString<C, M> (line 115) ... ok
[INFO] [stdout] test src/monoid.rs - monoid::MonoidalString<C, M> (line 105) ... ok
[INFO] [stdout] test src/module.rs - module::ModuleString<R, T, A>::get (line 279) ... ok
[INFO] [stdout] test src/module.rs - module::ModuleString<R, T, A>::iter_mut (line 303) ... ok
[INFO] [stdout] test src/monoid.rs - monoid::MonoidalString<C, M>::commutator (line 337) ... ok
[INFO] [stdout] test src/module.rs - module::ModuleString<R, T, A>::get_ref (line 258) ... ok
[INFO] [stdout] test src/module.rs - module::ModuleString<R, T, A> (line 75) ... ok
[INFO] [stdout] test src/specifics/free_group.rs - specifics::free_group::FreeInv<T>::is_id (line 114) ... ok
[INFO] [stdout] test src/monoid.rs - monoid::MonoidalString<C, M>::iter (line 254) ... ok
[INFO] [stdout] test src/monoid.rs - monoid::MonoidalString<C, M>::reverse (line 302) ... ok
[INFO] [stdout] test src/module.rs - module::ModuleString<R, T, A>::commutator (line 352) ... ok
[INFO] [stdout] test src/specifics/free_group.rs - specifics::free_group::FreeInv<T>::is_inv (line 100) ... ok
[INFO] [stdout] test src/monoid.rs - monoid::MonoidalString<C, M>::len (line 236) ... ok
[INFO] [stdout] test src/monoid.rs - monoid::MonoidalString<C, M>::iter_mut (line 277) ... ok
[INFO] [stdout] test src/module.rs - module::ModuleString<R, T, A>::commutator (line 329) ... ok
[INFO] [stdout] test src/specifics/free_pow.rs - specifics::free_pow::FreePowMonoid (line 11) ... ok
[INFO] [stdout] test src/specifics/free_monoid.rs - specifics::free_monoid::FreeMonoid (line 11) ... ok
[INFO] [stdout] test src/specifics/free_group.rs - specifics::free_group::FreeGroup (line 10) ... ok
[INFO] [stdout] test src/specifics/mod.rs - specifics::FreeAlgebra (line 120) ... ok
[INFO] [stdout] test src/specifics/mod.rs - specifics::FreeModule (line 92) ... ok
[INFO] [stdout] test src/specifics/mod.rs - specifics::MonoidRing (line 40) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 26 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "5302b469eda4db8299fae844a957ea97d09d3f515a472d7fa55e5b6c47025168", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5302b469eda4db8299fae844a957ea97d09d3f515a472d7fa55e5b6c47025168", kill_on_drop: false }`
[INFO] [stdout] 5302b469eda4db8299fae844a957ea97d09d3f515a472d7fa55e5b6c47025168