[INFO] fetching crate immut_string 0.1.0...
[INFO] checking immut_string-0.1.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate immut_string 0.1.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate immut_string 0.1.0
[INFO] finished tweaking crates.io crate immut_string 0.1.0
[INFO] tweaked toml for crates.io crate immut_string 0.1.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate immut_string 0.1.0 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] ef71e92e36debfb5e20c2c55845df178fbcaa43f6c4e86cfc963b8bfeee54ef2
[INFO] running `Command { std: "docker" "start" "-a" "ef71e92e36debfb5e20c2c55845df178fbcaa43f6c4e86cfc963b8bfeee54ef2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ef71e92e36debfb5e20c2c55845df178fbcaa43f6c4e86cfc963b8bfeee54ef2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef71e92e36debfb5e20c2c55845df178fbcaa43f6c4e86cfc963b8bfeee54ef2", kill_on_drop: false }`
[INFO] [stdout] ef71e92e36debfb5e20c2c55845df178fbcaa43f6c4e86cfc963b8bfeee54ef2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 33cee2be771bc06aecf304c681a6c83406b6971239b68a5251b5f4cdb5e7a9dc
[INFO] running `Command { std: "docker" "start" "-a" "33cee2be771bc06aecf304c681a6c83406b6971239b68a5251b5f4cdb5e7a9dc", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]     Checking immut_string v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<ImmutString, Infallible>
[INFO] [stdout]    --> src/immut_string.rs:249:61
[INFO] [stdout]     |
[INFO] [stdout] 249 |       fn from_str(s: &str) -> Result<ImmutString, ParseError> {
[INFO] [stdout]     |  _____________________________________________________________^
[INFO] [stdout] 250 | |         Ok(ImmutString::from(s))
[INFO] [stdout] 251 | |     }
[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<ImmutString, Infallible>
[INFO] [stdout]    --> src/immut_string.rs:250:9
[INFO] [stdout]     |
[INFO] [stdout] 250 |         Ok(ImmutString::from(s))
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `immut_string` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<ImmutString, Infallible>
[INFO] [stdout]    --> src/immut_string.rs:249:61
[INFO] [stdout]     |
[INFO] [stdout] 249 |       fn from_str(s: &str) -> Result<ImmutString, ParseError> {
[INFO] [stdout]     |  _____________________________________________________________^
[INFO] [stdout] 250 | |         Ok(ImmutString::from(s))
[INFO] [stdout] 251 | |     }
[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<ImmutString, Infallible>
[INFO] [stdout]    --> src/immut_string.rs:250:9
[INFO] [stdout]     |
[INFO] [stdout] 250 |         Ok(ImmutString::from(s))
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `immut_string` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "33cee2be771bc06aecf304c681a6c83406b6971239b68a5251b5f4cdb5e7a9dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33cee2be771bc06aecf304c681a6c83406b6971239b68a5251b5f4cdb5e7a9dc", kill_on_drop: false }`
[INFO] [stdout] 33cee2be771bc06aecf304c681a6c83406b6971239b68a5251b5f4cdb5e7a9dc