[INFO] fetching crate mpdpopm 0.3.4...
[INFO] checking mpdpopm-0.3.4 against master#350d0ef0ec0493e6d21cfb265cb8211a0e74d766 for pr-145342-1
[INFO] extracting crate mpdpopm 0.3.4 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate mpdpopm 0.3.4
[INFO] finished tweaking crates.io crate mpdpopm 0.3.4
[INFO] tweaked toml for crates.io crate mpdpopm 0.3.4 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate mpdpopm 0.3.4 on toolchain 350d0ef0ec0493e6d21cfb265cb8211a0e74d766
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate mpdpopm 0.3.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] [stderr]   Downloaded serde-lexpr v0.1.3
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[INFO] running `Command { std: "docker" "inspect" "cb2a1983458ac4451901958a3c2465f4ed9e6eb0258c8e01f324916c799554b0", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "RUSTDOCFLAGS=--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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] [stderr]    Compiling mpdpopm v0.3.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: a method with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/messages.rs:444:36
[INFO] [stdout]     |
[INFO] [stdout] 444 |             (chan == command_chan).ok_or_else(|| Error::UnknownChannel {
[INFO] [stdout]     |                                    ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `ok_or_else(...)` to keep using the current method
[INFO] [stdout]     = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stdout] help: add `#![feature(bool_to_result)]` to the crate attributes to enable `filters::core::bool::<impl bool>::ok_or_else`
[INFO] [stdout]    --> src/lib.rs:35:1
[INFO] [stdout]     |
[INFO] [stdout]  35 + #![feature(bool_to_result)]
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: a method with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/messages.rs:444:36
[INFO] [stdout]     |
[INFO] [stdout] 444 |             (chan == command_chan).ok_or_else(|| Error::UnknownChannel {
[INFO] [stdout]     |                                    ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `ok_or_else(...)` to keep using the current method
[INFO] [stdout]     = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stdout] help: add `#![feature(bool_to_result)]` to the crate attributes to enable `filters::core::bool::<impl bool>::ok_or_else`
[INFO] [stdout]    --> src/lib.rs:35:1
[INFO] [stdout]     |
[INFO] [stdout]  35 + #![feature(bool_to_result)]
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 51.49s
[INFO] running `Command { std: "docker" "inspect" "50eaa906c10158065a8974e1e8df5383ea171e5d383ea7860fd9fd4b397e66c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50eaa906c10158065a8974e1e8df5383ea171e5d383ea7860fd9fd4b397e66c2", kill_on_drop: false }`
[INFO] [stdout] 50eaa906c10158065a8974e1e8df5383ea171e5d383ea7860fd9fd4b397e66c2