[INFO] fetching crate polytype 6.2.0...
[INFO] testing polytype-6.2.0 against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] extracting crate polytype 6.2.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate polytype 6.2.0 on toolchain a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate polytype 6.2.0
[INFO] finished tweaking crates.io crate polytype 6.2.0
[INFO] tweaked toml for crates.io crate polytype 6.2.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 36c6f2ea4050f3f3950f9ac02237f1e05357629b086bd98c2b2bb42a2570e9fd
[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" "36c6f2ea4050f3f3950f9ac02237f1e05357629b086bd98c2b2bb42a2570e9fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "36c6f2ea4050f3f3950f9ac02237f1e05357629b086bd98c2b2bb42a2570e9fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36c6f2ea4050f3f3950f9ac02237f1e05357629b086bd98c2b2bb42a2570e9fd", kill_on_drop: false }`
[INFO] [stdout] 36c6f2ea4050f3f3950f9ac02237f1e05357629b086bd98c2b2bb42a2570e9fd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "build" "--frozen" "--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] e7f54d026ea092f35eaba42b2fcd3de55433f00786215b5eaabdb0c4b1124919
[INFO] running `Command { std: "docker" "start" "-a" "e7f54d026ea092f35eaba42b2fcd3de55433f00786215b5eaabdb0c4b1124919", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling nom v4.1.1
[INFO] [stderr]    Compiling polytype v6.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.78s
[INFO] running `Command { std: "docker" "inspect" "e7f54d026ea092f35eaba42b2fcd3de55433f00786215b5eaabdb0c4b1124919", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7f54d026ea092f35eaba42b2fcd3de55433f00786215b5eaabdb0c4b1124919", kill_on_drop: false }`
[INFO] [stdout] e7f54d026ea092f35eaba42b2fcd3de55433f00786215b5eaabdb0c4b1124919
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cb31d048c366862742c0d811b5173791ba7bb8ed2db51bfc536e468c3e1b16c1
[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" "cb31d048c366862742c0d811b5173791ba7bb8ed2db51bfc536e468c3e1b16c1", kill_on_drop: false }`
[INFO] [stderr]    Compiling polytype v6.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.38s
[INFO] running `Command { std: "docker" "inspect" "cb31d048c366862742c0d811b5173791ba7bb8ed2db51bfc536e468c3e1b16c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb31d048c366862742c0d811b5173791ba7bb8ed2db51bfc536e468c3e1b16c1", kill_on_drop: false }`
[INFO] [stdout] cb31d048c366862742c0d811b5173791ba7bb8ed2db51bfc536e468c3e1b16c1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 2677097f02781decf4223b47289aa9624e0ffa6453e695b09ada3e9cf785e450
[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" "2677097f02781decf4223b47289aa9624e0ffa6453e695b09ada3e9cf785e450", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/polytype-bb1cc9f3e2e85be1)
[INFO] [stdout] 
[INFO] [stderr]      Running tests/tests.rs (/opt/rustwide/target/debug/deps/tests-15dad1a21fb6700e)
[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 13 tests
[INFO] [stdout] test test_arrow_methods ... ok
[INFO] [stdout] test test_ptp_macro ... ok
[INFO] [stdout] test test_merge_with_sacreds ... ok
[INFO] [stdout] test test_tp_from_vec ... ok
[INFO] [stdout] test test_tp_from_vecdeque ... ok
[INFO] [stdout] test test_tp_macro ... ok
[INFO] [stdout] test test_parse ... ok
[INFO] [stdout] test test_unify_both_sides_polymorphic_occurs ... ok
[INFO] [stdout] test test_unify_both_sides_polymorphic ... ok
[INFO] [stdout] test test_merge_no_sacreds ... ok
[INFO] [stdout] test test_unify_nonstring_name ... ok
[INFO] [stdout] test test_unify_one_side_polymorphic ... ok
[INFO] [stdout] test test_unify_one_side_polymorphic_fail ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 13 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests polytype
[INFO] [stdout] 
[INFO] [stdout] running 45 tests
[INFO] [stdout] test src/macros.rs - macros::ptp (line 119) ... ignored
[INFO] [stdout] test src/lib.rs - Infer (line 192) ... ok
[INFO] [stdout] test src/lib.rs - Name (line 129) ... ok
[INFO] [stdout] test src/macros.rs - macros::ptp (line 141) ... ok
[INFO] [stdout] test src/lib.rs - Name (line 121) ... ok
[INFO] [stdout] test src/context.rs - context::Context<N>::unify (line 190) ... ok
[INFO] [stdout] test src/macros.rs - macros::tp (line 5) ... ignored
[INFO] [stdout] test src/context.rs - context::Context<N>::new_variable (line 146) ... ok
[INFO] [stdout] test src/context.rs - context::Context<N>::unify (line 210) ... ok
[INFO] [stdout] test src/lib.rs - Infer (line 207) ... ok
[INFO] [stdout] test src/macros.rs - macros::ptp (line 159) ... ok
[INFO] [stdout] test src/context.rs - context::Context<N>::unify (line 174) ... ok
[INFO] [stdout] test src/lib.rs - (line 18) ... ok
[INFO] [stdout] test src/context.rs - context::Context<N>::clean (line 96) ... ok
[INFO] [stdout] test src/context.rs - context::Context<N>::confine (line 295) ... ok
[INFO] [stdout] test src/macros.rs - macros::tp (line 31) ... ok
[INFO] [stdout] test src/macros.rs - macros::tp (line 42) ... ok
[INFO] [stdout] test src/macros.rs - macros::tp (line 53) ... ok
[INFO] [stdout] test src/context.rs - context::Context<N>::merge (line 335) ... ok
[INFO] [stdout] test src/context.rs - context::Context<N>::merge (line 362) ... ok
[INFO] [stdout] test src/macros.rs - macros::ptp (line 185) ... ok
[INFO] [stdout] test src/lib.rs - (line 44) ... ok
[INFO] [stdout] test src/macros.rs - macros::tp (line 69) ... ok
[INFO] [stdout] test src/lib.rs - Infer (line 244) ... ok
[INFO] [stdout] test src/macros.rs - macros::tp (line 86) ... ok
[INFO] [stdout] test src/types.rs - types::Type::Constructed (line 196) ... ok
[INFO] [stdout] test src/types.rs - types::Type::Constructed (line 205) ... ok
[INFO] [stdout] test src/types.rs - types::Type::Constructed (line 215) ... ok
[INFO] [stdout] test src/types.rs - types::Type::Constructed (line 188) ... ok
[INFO] [stdout] test src/types.rs - types::Type<N>::args (line 324) ... ok
[INFO] [stdout] test src/types.rs - types::Type::Variable (line 235) ... ok
[INFO] [stdout] test src/types.rs - types::Type::Variable (line 244) ... ok
[INFO] [stdout] test src/parser.rs - parser::Type<N>::parse (line 146) ... ok
[INFO] [stdout] test src/types.rs - types::Type<N>::arrow (line 261) ... ok
[INFO] [stdout] test src/types.rs - types::Type<N>::returns (line 378) ... ok
[INFO] [stdout] test src/types.rs - types::Type<N>::as_arrow (line 273) ... ok
[INFO] [stdout] test src/types.rs - types::TypeSchema<N>::bound_vars (line 56) ... ok
[INFO] [stdout] test src/parser.rs - parser::TypeSchema<N>::parse (line 121) ... ok
[INFO] [stdout] test src/types.rs - types::TypeSchema<N>::is_bound (line 39) ... ok
[INFO] [stdout] test src/types.rs - types::Type<N>::apply (line 409) ... ok
[INFO] [stdout] test src/types.rs - types::TypeSchema<N>::free_vars (line 77) ... ok
[INFO] [stdout] test src/types.rs - types::Type<N>::generalize (line 483) ... ok
[INFO] [stdout] test src/types.rs - types::Type<N>::vars (line 518) ... ok
[INFO] [stdout] test src/types.rs - types::Type<N>::substitute (line 548) ... ok
[INFO] [stdout] test src/types.rs - types::TypeSchema<N>::instantiate (line 108) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 43 passed; 0 failed; 2 ignored; 0 measured; 0 filtered out; finished in 15.32s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "2677097f02781decf4223b47289aa9624e0ffa6453e695b09ada3e9cf785e450", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2677097f02781decf4223b47289aa9624e0ffa6453e695b09ada3e9cf785e450", kill_on_drop: false }`
[INFO] [stdout] 2677097f02781decf4223b47289aa9624e0ffa6453e695b09ada3e9cf785e450