[INFO] fetching crate legacylisten 0.3.3...
[INFO] checking legacylisten-0.3.3 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate legacylisten 0.3.3 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate legacylisten 0.3.3
[INFO] finished tweaking crates.io crate legacylisten 0.3.3
[INFO] tweaked toml for crates.io crate legacylisten 0.3.3 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate legacylisten 0.3.3 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate legacylisten 0.3.3 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0c56661abe0c068106354ec4ef01a8f0e8d8962813f8ea463707abac374e2ac3
[INFO] running `Command { std: "docker" "start" "-a" "0c56661abe0c068106354ec4ef01a8f0e8d8962813f8ea463707abac374e2ac3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0c56661abe0c068106354ec4ef01a8f0e8d8962813f8ea463707abac374e2ac3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c56661abe0c068106354ec4ef01a8f0e8d8962813f8ea463707abac374e2ac3", kill_on_drop: false }`
[INFO] [stdout] 0c56661abe0c068106354ec4ef01a8f0e8d8962813f8ea463707abac374e2ac3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 99a146b9b6e13a24d1333b2b5314e2f1f3889e823f0e2ca20592383e15c45aee
[INFO] running `Command { std: "docker" "start" "-a" "99a146b9b6e13a24d1333b2b5314e2f1f3889e823f0e2ca20592383e15c45aee", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.89
[INFO] [stderr]    Compiling libc v0.2.162
[INFO] [stderr]     Checking litemap v0.7.3
[INFO] [stderr]     Checking smallvec v1.13.2
[INFO] [stderr]     Checking icu_locid_transform_data v1.5.0
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[INFO] [stderr]     Checking gimli v0.31.1
[INFO] [stderr]     Checking self_cell v1.0.4
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[INFO] [stderr]    Compiling crossbeam-utils v0.8.20
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[INFO] [stderr]     Checking rustc-demangle v0.1.24
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[INFO] [stderr]    Compiling proc-macro-crate v3.2.0
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[INFO] [stderr]    Compiling num_enum_derive v0.7.3
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[INFO] [stderr]     Checking legacytranslate v0.3.1
[INFO] [stderr]     Checking legacylisten v0.3.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks
[INFO] [stdout]    --> src/l10n/messages.rs:138:5
[INFO] [stdout]     |
[INFO] [stdout] 138 |     #[must_use]
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = help: `#[must_use]` can be applied to data types, foreign functions, functions, inherent methods, provided trait methods, required trait methods, traits, and unions
[INFO] [stdout]     = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks
[INFO] [stdout]    --> src/l10n/messages.rs:377:5
[INFO] [stdout]     |
[INFO] [stdout] 377 |     #[must_use]
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = help: `#[must_use]` can be applied to data types, foreign functions, functions, inherent methods, provided trait methods, required trait methods, traits, and unions
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks
[INFO] [stdout]    --> src/l10n/messages.rs:138:5
[INFO] [stdout]     |
[INFO] [stdout] 138 |     #[must_use]
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = help: `#[must_use]` can be applied to data types, foreign functions, functions, inherent methods, provided trait methods, required trait methods, traits, and unions
[INFO] [stdout]     = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[must_use]` attribute cannot be used on trait methods in impl blocks
[INFO] [stdout]    --> src/l10n/messages.rs:377:5
[INFO] [stdout]     |
[INFO] [stdout] 377 |     #[must_use]
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = help: `#[must_use]` can be applied to data types, foreign functions, functions, inherent methods, provided trait methods, required trait methods, traits, and unions
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]    --> src/conffile.rs:121:36
[INFO] [stdout]     |
[INFO] [stdout] 121 |                         let path = line[2].parse();
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]    --> src/conffile.rs:124:54
[INFO] [stdout]     |
[INFO] [stdout] 124 |                         if let (Ok(path), Ok(id)) = (path, id)
[INFO] [stdout]     |                                                      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]    --> src/conffile.rs:121:36
[INFO] [stdout]     |
[INFO] [stdout] 121 |                         let path = line[2].parse();
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]    --> src/conffile.rs:124:54
[INFO] [stdout]     |
[INFO] [stdout] 124 |                         if let (Ok(path), Ok(id)) = (path, id)
[INFO] [stdout]     |                                                      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `legacylisten` (lib test) due to 2 previous errors; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `legacylisten` (lib) due to 2 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "99a146b9b6e13a24d1333b2b5314e2f1f3889e823f0e2ca20592383e15c45aee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99a146b9b6e13a24d1333b2b5314e2f1f3889e823f0e2ca20592383e15c45aee", kill_on_drop: false }`
[INFO] [stdout] 99a146b9b6e13a24d1333b2b5314e2f1f3889e823f0e2ca20592383e15c45aee