[INFO] fetching crate fallible-iterator 0.3.0... [INFO] checking fallible-iterator-0.3.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577 [INFO] extracting crate fallible-iterator 0.3.0 into /workspace/builds/worker-5-tc2/source [INFO] started tweaking crates.io crate fallible-iterator 0.3.0 [INFO] finished tweaking crates.io crate fallible-iterator 0.3.0 [INFO] tweaked toml for crates.io crate fallible-iterator 0.3.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate fallible-iterator 0.3.0 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] b6f978c600f78382195a3b00fe827381ca6aa55a98327696ce7f74356b340633 [INFO] running `Command { std: "docker" "start" "-a" "b6f978c600f78382195a3b00fe827381ca6aa55a98327696ce7f74356b340633", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "b6f978c600f78382195a3b00fe827381ca6aa55a98327696ce7f74356b340633", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b6f978c600f78382195a3b00fe827381ca6aa55a98327696ce7f74356b340633", kill_on_drop: false }` [INFO] [stdout] b6f978c600f78382195a3b00fe827381ca6aa55a98327696ce7f74356b340633 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 365fecb193d11685e4350bc229631827cc916ccb11fa2cf4b0ebe1b41947f568 [INFO] running `Command { std: "docker" "start" "-a" "365fecb193d11685e4350bc229631827cc916ccb11fa2cf4b0ebe1b41947f568", kill_on_drop: false }` [INFO] [stderr] Checking fallible-iterator v0.3.0 (/opt/rustwide/workdir) [INFO] [stdout] error: this type will no longer be must used: Result, Infallible> [INFO] [stdout] --> src/lib.rs:1424:58 [INFO] [stdout] | [INFO] [stdout] 1424 | fn next(&mut self) -> Result, Self::Error> { [INFO] [stdout] | __________________________________________________________^ [INFO] [stdout] 1425 | | Ok(self.0.next()) [INFO] [stdout] 1426 | | } [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, Infallible> [INFO] [stdout] --> src/lib.rs:1425:9 [INFO] [stdout] | [INFO] [stdout] 1425 | Ok(self.0.next()) [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result, Infallible> [INFO] [stdout] --> src/lib.rs:1454:62 [INFO] [stdout] | [INFO] [stdout] 1454 | fn next_back(&mut self) -> Result, Infallible> { [INFO] [stdout] | ______________________________________________________________^ [INFO] [stdout] 1455 | | Ok(self.0.next_back()) [INFO] [stdout] 1456 | | } [INFO] [stdout] | |_____^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result, Infallible> [INFO] [stdout] --> src/lib.rs:1455:9 [INFO] [stdout] | [INFO] [stdout] 1455 | Ok(self.0.next_back()) [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `fallible-iterator` (lib) due to 4 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, Infallible> [INFO] [stdout] --> src/lib.rs:1424:58 [INFO] [stdout] | [INFO] [stdout] 1424 | fn next(&mut self) -> Result, Self::Error> { [INFO] [stdout] | __________________________________________________________^ [INFO] [stdout] 1425 | | Ok(self.0.next()) [INFO] [stdout] 1426 | | } [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, Infallible> [INFO] [stdout] --> src/lib.rs:1425:9 [INFO] [stdout] | [INFO] [stdout] 1425 | Ok(self.0.next()) [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result, Infallible> [INFO] [stdout] --> src/lib.rs:1454:62 [INFO] [stdout] | [INFO] [stdout] 1454 | fn next_back(&mut self) -> Result, Infallible> { [INFO] [stdout] | ______________________________________________________________^ [INFO] [stdout] 1455 | | Ok(self.0.next_back()) [INFO] [stdout] 1456 | | } [INFO] [stdout] | |_____^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result, Infallible> [INFO] [stdout] --> src/lib.rs:1455:9 [INFO] [stdout] | [INFO] [stdout] 1455 | Ok(self.0.next_back()) [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result, Infallible> [INFO] [stdout] --> src/test.rs:476:16 [INFO] [stdout] | [INFO] [stdout] 476 | assert_eq!(it.collect::>().unwrap(), vec![0, 1, 2, 3]); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `fallible-iterator` (lib test) due to 5 previous errors [INFO] running `Command { std: "docker" "inspect" "365fecb193d11685e4350bc229631827cc916ccb11fa2cf4b0ebe1b41947f568", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "365fecb193d11685e4350bc229631827cc916ccb11fa2cf4b0ebe1b41947f568", kill_on_drop: false }` [INFO] [stdout] 365fecb193d11685e4350bc229631827cc916ccb11fa2cf4b0ebe1b41947f568