[INFO] fetching crate cairo-lint 2.13.1...
[INFO] checking cairo-lint-2.13.1 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate cairo-lint 2.13.1 into /workspace/builds/worker-2-tc2/source
[INFO] removed /workspace/builds/worker-2-tc2/source/.cargo/config.toml
[INFO] started tweaking crates.io crate cairo-lint 2.13.1
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate cairo-lint 2.13.1
[INFO] tweaked toml for crates.io crate cairo-lint 2.13.1 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate cairo-lint 2.13.1 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 cairo-lint 2.13.1 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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] 0b2f5c70fb937ed9559f15f05888db88323485f34ffbe5c8faa3ba5ecfeaf7b8
[INFO] running `Command { std: "docker" "start" "-a" "0b2f5c70fb937ed9559f15f05888db88323485f34ffbe5c8faa3ba5ecfeaf7b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0b2f5c70fb937ed9559f15f05888db88323485f34ffbe5c8faa3ba5ecfeaf7b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0b2f5c70fb937ed9559f15f05888db88323485f34ffbe5c8faa3ba5ecfeaf7b8", kill_on_drop: false }`
[INFO] [stdout] 0b2f5c70fb937ed9559f15f05888db88323485f34ffbe5c8faa3ba5ecfeaf7b8
[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] 0094a5de63eefb0f6acba62b38679803132a2d26f1e8ec4eaaa899192224686b
[INFO] running `Command { std: "docker" "start" "-a" "0094a5de63eefb0f6acba62b38679803132a2d26f1e8ec4eaaa899192224686b", kill_on_drop: false }`
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[INFO] [stderr]    Compiling cairo-lang-debug v2.13.1
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[INFO] [stderr]     Checking cairo-lang-sierra-ap-change v2.13.1
[INFO] [stderr]     Checking cairo-lang-sierra-gas v2.13.1
[INFO] [stderr]     Checking cairo-lang-sierra-to-casm v2.13.1
[INFO] [stderr]     Checking cairo-lang-runnable-utils v2.13.1
[INFO] [stderr]     Checking cairo-lang-starknet-classes v2.13.1
[INFO] [stderr]     Checking cairo-lang-parser v2.13.1
[INFO] [stderr]     Checking cairo-lang-formatter v2.13.1
[INFO] [stderr]     Checking cairo-lang-defs v2.13.1
[INFO] [stderr]     Checking cairo-lang-test-utils v2.13.1
[INFO] [stderr]     Checking cairo-lang-plugins v2.13.1
[INFO] [stderr]     Checking cairo-lang-semantic v2.13.1
[INFO] [stderr]     Checking cairo-lang-lowering v2.13.1
[INFO] [stderr]     Checking cairo-lang-sierra-generator v2.13.1
[INFO] [stderr]     Checking cairo-lang-compiler v2.13.1
[INFO] [stderr]     Checking cairo-lang-starknet v2.13.1
[INFO] [stderr]     Checking cairo-lang-test-plugin v2.13.1
[INFO] [stderr]     Checking cairo-lint v2.13.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<std::string::String, Infallible>
[INFO] [stdout]    --> src/lints/manual/manual_is_empty.rs:157:21
[INFO] [stdout]     |
[INFO] [stdout] 157 |           suggestion: format!(
[INFO] [stdout]     |  _____________________^
[INFO] [stdout] 158 | |             "{}.is_empty()",
[INFO] [stdout] 159 | |             node_for_wrapping.get_text_without_trivia(db).to_string(db)
[INFO] [stdout] 160 | |         )
[INFO] [stdout] 161 | |         .parse()
[INFO] [stdout]     | |________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cairo-lint` (lib test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<std::string::String, Infallible>
[INFO] [stdout]    --> src/lints/manual/manual_is_empty.rs:157:21
[INFO] [stdout]     |
[INFO] [stdout] 157 |           suggestion: format!(
[INFO] [stdout]     |  _____________________^
[INFO] [stdout] 158 | |             "{}.is_empty()",
[INFO] [stdout] 159 | |             node_for_wrapping.get_text_without_trivia(db).to_string(db)
[INFO] [stdout] 160 | |         )
[INFO] [stdout] 161 | |         .parse()
[INFO] [stdout]     | |________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cairo-lint` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "0094a5de63eefb0f6acba62b38679803132a2d26f1e8ec4eaaa899192224686b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0094a5de63eefb0f6acba62b38679803132a2d26f1e8ec4eaaa899192224686b", kill_on_drop: false }`
[INFO] [stdout] 0094a5de63eefb0f6acba62b38679803132a2d26f1e8ec4eaaa899192224686b