[INFO] fetching crate pharos 0.5.1...
[INFO] checking pharos-0.5.1 against try#45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4 for pr-83744
[INFO] extracting crate pharos 0.5.1 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate pharos 0.5.1 on toolchain 45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "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-14/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" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded wasm-bindgen-test-macro v0.3.20
[INFO] [stderr]   Downloaded wasm-bindgen-test v0.3.20
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a4ab8053036db0ec896c7dabbc5b11e340cd0cff197e73a4d361eef53b80d07c
[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" "a4ab8053036db0ec896c7dabbc5b11e340cd0cff197e73a4d361eef53b80d07c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a4ab8053036db0ec896c7dabbc5b11e340cd0cff197e73a4d361eef53b80d07c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4ab8053036db0ec896c7dabbc5b11e340cd0cff197e73a4d361eef53b80d07c", kill_on_drop: false }`
[INFO] [stdout] a4ab8053036db0ec896c7dabbc5b11e340cd0cff197e73a4d361eef53b80d07c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "check" "--frozen" "--all" "--all-targets" "--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] 0f7a7827840fc22a6c83130aec7edb32984f333cd9210c7c6628b941eeff2ce4
[INFO] running `Command { std: "docker" "start" "-a" "0f7a7827840fc22a6c83130aec7edb32984f333cd9210c7c6628b941eeff2ce4", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]     Checking futures-core v0.3.12
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[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
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[INFO] [stderr]     Checking nb-connect v1.0.3
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling pharos v0.5.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking async-executor v1.4.0
[INFO] [stderr]     Checking blocking v1.0.2
[INFO] [stderr]    Compiling wasm-bindgen-test-macro v0.3.20
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[INFO] [stderr]    Compiling rustc_version v0.3.3
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[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]    Compiling value-bag v1.0.0-alpha.6
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[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.70
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[INFO] [stderr]     Checking async-global-executor v2.0.2
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[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.70
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.70
[INFO] [stderr]     Checking futures-executor v0.3.12
[INFO] [stderr]     Checking futures v0.3.12
[INFO] [stderr]     Checking js-sys v0.3.47
[INFO] [stderr]     Checking console_error_panic_hook v0.1.6
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[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" "0f7a7827840fc22a6c83130aec7edb32984f333cd9210c7c6628b941eeff2ce4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f7a7827840fc22a6c83130aec7edb32984f333cd9210c7c6628b941eeff2ce4", kill_on_drop: false }`
[INFO] [stdout] 0f7a7827840fc22a6c83130aec7edb32984f333cd9210c7c6628b941eeff2ce4