[INFO] fetching crate pharos 0.5.1...
[INFO] checking pharos-0.5.1 against master#195ad4830e11a544391abe296b146450dea8411b for pr-82781
[INFO] extracting crate pharos 0.5.1 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate pharos 0.5.1 on toolchain 195ad4830e11a544391abe296b146450dea8411b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+195ad4830e11a544391abe296b146450dea8411b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pharos 0.5.1
[INFO] finished tweaking crates.io crate pharos 0.5.1
[INFO] tweaked toml for crates.io crate pharos 0.5.1 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate pharos 0.5.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+195ad4830e11a544391abe296b146450dea8411b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+195ad4830e11a544391abe296b146450dea8411b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 58c82df7781a6b20c27363140330351e1c0afcef07adeec060fe0908a07f0139
[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" "58c82df7781a6b20c27363140330351e1c0afcef07adeec060fe0908a07f0139", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "58c82df7781a6b20c27363140330351e1c0afcef07adeec060fe0908a07f0139", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58c82df7781a6b20c27363140330351e1c0afcef07adeec060fe0908a07f0139", kill_on_drop: false }`
[INFO] [stdout] 58c82df7781a6b20c27363140330351e1c0afcef07adeec060fe0908a07f0139
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+195ad4830e11a544391abe296b146450dea8411b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 29942b24e69d21d753a6fd24d3171ef03ccf7dc10a9d56b93433383e855d9266
[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" "29942b24e69d21d753a6fd24d3171ef03ccf7dc10a9d56b93433383e855d9266", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling value-bag v1.0.0-alpha.6
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking futures-core v0.3.12
[INFO] [stderr]    Compiling libc v0.2.86
[INFO] [stderr]     Checking futures-io v0.3.12
[INFO] [stderr]     Checking pin-project-lite v0.2.4
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling bumpalo v3.6.0
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]    Compiling signal-hook v0.3.4
[INFO] [stderr]     Checking scoped-tls v1.0.0
[INFO] [stderr]     Checking assert_matches v1.5.0
[INFO] [stderr]     Checking futures-task v0.3.12
[INFO] [stderr]     Checking async-lock v2.3.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.1
[INFO] [stderr]    Compiling semver-parser v0.10.2
[INFO] [stderr]    Compiling pharos v0.5.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling wasm-bindgen-test-macro v0.3.20
[INFO] [stderr]     Checking futures-channel v0.3.12
[INFO] [stderr]     Checking async-channel v1.5.1
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[INFO] [stderr]    Compiling semver v0.11.0
[INFO] [stderr]     Checking socket2 v0.3.19
[INFO] [stderr]     Checking signal-hook-registry v1.3.0
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]    Compiling rustc_version v0.3.3
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[INFO] [stderr]    Compiling async_executors v0.4.0
[INFO] [stderr]     Checking async-executor v1.4.0
[INFO] [stderr]     Checking blocking v1.0.2
[INFO] [stderr]    Compiling ctor v0.1.19
[INFO] [stderr]    Compiling futures-macro v0.3.12
[INFO] [stderr]    Compiling async-attributes v1.1.2
[INFO] [stderr]     Checking futures-util v0.3.12
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.70
[INFO] [stderr]     Checking polling v2.0.2
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking async-io v1.3.1
[INFO] [stderr]     Checking async-process v1.0.2
[INFO] [stderr]     Checking async-global-executor v2.0.2
[INFO] [stderr]     Checking async-std v1.9.0
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.70
[INFO] [stderr]     Checking futures-executor v0.3.12
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.70
[INFO] [stderr]     Checking futures v0.3.12
[INFO] [stderr]     Checking wasm-bindgen v0.2.70
[INFO] [stderr]     Checking js-sys v0.3.47
[INFO] [stderr]     Checking console_error_panic_hook v0.1.6
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[INFO] [stderr]     Checking wasm-bindgen-test v0.3.20
[INFO] [stdout] error[E0659]: `assert_matches` is ambiguous (glob import vs any other name from outer scope during import/macro resolution)
[INFO] [stdout]    --> src/pharos.rs:521:5
[INFO] [stdout]     |
[INFO] [stdout] 521 |                 assert_matches!( ph.as_mut().poll_ready( &mut cx ), Poll::Ready( Ok(_) ) );
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^ ambiguous name
[INFO] [stdout]     |
[INFO] [stdout]     = note: `assert_matches` could refer to a macro from prelude
[INFO] [stdout] note: `assert_matches` could also refer to the macro imported here
[INFO] [stdout]    --> src/pharos.rs:362:20
[INFO] [stdout]     |
[INFO] [stdout] 362 |     use crate :: { *, import::* };
[INFO] [stdout]     |                       ^^^^^^^^^
[INFO] [stdout]     = help: consider adding an explicit import of `assert_matches` to disambiguate
[INFO] [stdout]     = help: or use `self::assert_matches` to refer to this macro unambiguously
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0659]: `assert_matches` is ambiguous (glob import vs any other name from outer scope during import/macro resolution)
[INFO] [stdout]    --> src/pharos.rs:524:5
[INFO] [stdout]     |
[INFO] [stdout] 524 |                 assert_matches!( ph.as_mut().poll_ready( &mut cx ), Poll::Pending );
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^ ambiguous name
[INFO] [stdout]     |
[INFO] [stdout]     = note: `assert_matches` could refer to a macro from prelude
[INFO] [stdout] note: `assert_matches` could also refer to the macro imported here
[INFO] [stdout]    --> src/pharos.rs:362:20
[INFO] [stdout]     |
[INFO] [stdout] 362 |     use crate :: { *, import::* };
[INFO] [stdout]     |                       ^^^^^^^^^
[INFO] [stdout]     = help: consider adding an explicit import of `assert_matches` to disambiguate
[INFO] [stdout]     = help: or use `self::assert_matches` to refer to this macro unambiguously
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0659]: `assert_matches` is ambiguous (glob import vs any other name from outer scope during import/macro resolution)
[INFO] [stdout]    --> src/pharos.rs:528:5
[INFO] [stdout]     |
[INFO] [stdout] 528 |                 assert_matches!( ph.as_mut().poll_ready( &mut cx ), Poll::Ready( Ok(_) ) );
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^ ambiguous name
[INFO] [stdout]     |
[INFO] [stdout]     = note: `assert_matches` could refer to a macro from prelude
[INFO] [stdout] note: `assert_matches` could also refer to the macro imported here
[INFO] [stdout]    --> src/pharos.rs:362:20
[INFO] [stdout]     |
[INFO] [stdout] 362 |     use crate :: { *, import::* };
[INFO] [stdout]     |                       ^^^^^^^^^
[INFO] [stdout]     = help: consider adding an explicit import of `assert_matches` to disambiguate
[INFO] [stdout]     = help: or use `self::assert_matches` to refer to this macro unambiguously
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0659]: `assert_matches` is ambiguous (glob import vs any other name from outer scope during import/macro resolution)
[INFO] [stdout]    --> src/pharos.rs:556:4
[INFO] [stdout]     |
[INFO] [stdout] 556 |             assert_matches!( ph.as_mut().poll_ready( &mut cx ), Poll::Ready( Ok(_) ) );
[INFO] [stdout]     |             ^^^^^^^^^^^^^^ ambiguous name
[INFO] [stdout]     |
[INFO] [stdout]     = note: `assert_matches` could refer to a macro from prelude
[INFO] [stdout] note: `assert_matches` could also refer to the macro imported here
[INFO] [stdout]    --> src/pharos.rs:362:20
[INFO] [stdout]     |
[INFO] [stdout] 362 |     use crate :: { *, import::* };
[INFO] [stdout]     |                       ^^^^^^^^^
[INFO] [stdout]     = help: consider adding an explicit import of `assert_matches` to disambiguate
[INFO] [stdout]     = help: or use `self::assert_matches` to refer to this macro unambiguously
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0659]: `assert_matches` is ambiguous (glob import vs any other name from outer scope during import/macro resolution)
[INFO] [stdout]    --> src/pharos.rs:579:5
[INFO] [stdout]     |
[INFO] [stdout] 579 |                 assert_matches!( ph.as_mut().poll_close( cx ), Poll::Ready(Ok(())) );
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^ ambiguous name
[INFO] [stdout]     |
[INFO] [stdout]     = note: `assert_matches` could refer to a macro from prelude
[INFO] [stdout] note: `assert_matches` could also refer to the macro imported here
[INFO] [stdout]    --> src/pharos.rs:362:20
[INFO] [stdout]     |
[INFO] [stdout] 362 |     use crate :: { *, import::* };
[INFO] [stdout]     |                       ^^^^^^^^^
[INFO] [stdout]     = help: consider adding an explicit import of `assert_matches` to disambiguate
[INFO] [stdout]     = help: or use `self::assert_matches` to refer to this macro unambiguously
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0659]: `assert_matches` is ambiguous (glob import vs any other name from outer scope during import/macro resolution)
[INFO] [stdout]    --> src/pharos.rs:583:5
[INFO] [stdout]     |
[INFO] [stdout] 583 |                 assert_matches!( res, Poll::Ready( Err(_) ) );
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^ ambiguous name
[INFO] [stdout]     |
[INFO] [stdout]     = note: `assert_matches` could refer to a macro from prelude
[INFO] [stdout] note: `assert_matches` could also refer to the macro imported here
[INFO] [stdout]    --> src/pharos.rs:362:20
[INFO] [stdout]     |
[INFO] [stdout] 362 |     use crate :: { *, import::* };
[INFO] [stdout]     |                       ^^^^^^^^^
[INFO] [stdout]     = help: consider adding an explicit import of `assert_matches` to disambiguate
[INFO] [stdout]     = help: or use `self::assert_matches` to refer to this macro unambiguously
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0659]: `assert_matches` is ambiguous (glob import vs any other name from outer scope during import/macro resolution)
[INFO] [stdout]    --> src/pharos.rs:614:4
[INFO] [stdout]     |
[INFO] [stdout] 614 |             assert_matches!( ph.as_mut().poll_ready( &mut cx ), Poll::Ready( Ok(_) ) );
[INFO] [stdout]     |             ^^^^^^^^^^^^^^ ambiguous name
[INFO] [stdout]     |
[INFO] [stdout]     = note: `assert_matches` could refer to a macro from prelude
[INFO] [stdout] note: `assert_matches` could also refer to the macro imported here
[INFO] [stdout]    --> src/pharos.rs:362:20
[INFO] [stdout]     |
[INFO] [stdout] 362 |     use crate :: { *, import::* };
[INFO] [stdout]     |                       ^^^^^^^^^
[INFO] [stdout]     = help: consider adding an explicit import of `assert_matches` to disambiguate
[INFO] [stdout]     = help: or use `self::assert_matches` to refer to this macro unambiguously
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0659]: `assert_matches` is ambiguous (glob import vs any other name from outer scope during import/macro resolution)
[INFO] [stdout]    --> src/pharos.rs:644:4
[INFO] [stdout]     |
[INFO] [stdout] 644 |             assert_matches!( ph.as_mut().poll_flush( &mut cx ), Poll::Ready( Ok(_) ) );
[INFO] [stdout]     |             ^^^^^^^^^^^^^^ ambiguous name
[INFO] [stdout]     |
[INFO] [stdout]     = note: `assert_matches` could refer to a macro from prelude
[INFO] [stdout] note: `assert_matches` could also refer to the macro imported here
[INFO] [stdout]    --> src/pharos.rs:362:20
[INFO] [stdout]     |
[INFO] [stdout] 362 |     use crate :: { *, import::* };
[INFO] [stdout]     |                       ^^^^^^^^^
[INFO] [stdout]     = help: consider adding an explicit import of `assert_matches` to disambiguate
[INFO] [stdout]     = help: or use `self::assert_matches` to refer to this macro unambiguously
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 8 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0659`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pharos`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "29942b24e69d21d753a6fd24d3171ef03ccf7dc10a9d56b93433383e855d9266", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "29942b24e69d21d753a6fd24d3171ef03ccf7dc10a9d56b93433383e855d9266", kill_on_drop: false }`
[INFO] [stdout] 29942b24e69d21d753a6fd24d3171ef03ccf7dc10a9d56b93433383e855d9266