[INFO] fetching crate tree-flat 0.1.3... [INFO] checking tree-flat-0.1.3 against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930 [INFO] extracting crate tree-flat 0.1.3 into /workspace/builds/worker-2-tc2/source [INFO] validating manifest of crates.io crate tree-flat 0.1.3 on toolchain c387b04bf028733cd561d62128c8a5eee4bc1458 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate tree-flat 0.1.3 [INFO] finished tweaking crates.io crate tree-flat 0.1.3 [INFO] tweaked toml for crates.io crate tree-flat 0.1.3 written to /workspace/builds/worker-2-tc2/source/Cargo.toml [INFO] crate crates.io crate tree-flat 0.1.3 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" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 576d66fd04c863efe4e42e8cdae44afeb5c164befacedae9124d40d69ceb15f5 [INFO] running `Command { std: "docker" "start" "-a" "576d66fd04c863efe4e42e8cdae44afeb5c164befacedae9124d40d69ceb15f5", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "576d66fd04c863efe4e42e8cdae44afeb5c164befacedae9124d40d69ceb15f5", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "576d66fd04c863efe4e42e8cdae44afeb5c164befacedae9124d40d69ceb15f5", kill_on_drop: false }` [INFO] [stdout] 576d66fd04c863efe4e42e8cdae44afeb5c164befacedae9124d40d69ceb15f5 [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 -Dtail_expr_drop_order" "-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] f103b8001c109b76d92872e681dd7d9b3c0fcad0ae3b8ebb1442a1e4c1c93059 [INFO] running `Command { std: "docker" "start" "-a" "f103b8001c109b76d92872e681dd7d9b3c0fcad0ae3b8ebb1442a1e4c1c93059", kill_on_drop: false }` [INFO] [stderr] Compiling syn v1.0.86 [INFO] [stderr] Compiling libc v0.2.119 [INFO] [stderr] Checking ciborium-io v0.2.0 [INFO] [stderr] Checking os_str_bytes v6.3.1 [INFO] [stderr] Checking either v1.6.1 [INFO] [stderr] Checking plotters-backend v0.3.4 [INFO] [stderr] Checking half v1.8.2 [INFO] [stderr] Compiling num-traits v0.2.14 [INFO] [stderr] Compiling indexmap v1.9.1 [INFO] [stderr] Checking regex-syntax v0.6.25 [INFO] [stderr] Checking textwrap v0.16.0 [INFO] [stderr] Checking walkdir v2.3.2 [INFO] [stderr] Checking ego-tree v0.6.2 [INFO] [stderr] Checking tree-flat v0.1.3 (/opt/rustwide/workdir) [INFO] [stderr] Checking itertools v0.10.3 [INFO] [stderr] Checking clap_lex v0.2.4 [INFO] [stderr] Checking plotters-svg v0.3.3 [INFO] [stderr] Checking ciborium-ll v0.2.0 [INFO] [stderr] Checking clap v3.2.23 [INFO] [stderr] Checking atty v0.2.14 [INFO] [stderr] Checking plotters v0.3.4 [INFO] [stderr] Checking regex v1.5.4 [INFO] [stderr] Checking criterion-plot v0.5.0 [INFO] [stderr] Compiling serde_derive v1.0.136 [INFO] [stderr] Checking serde v1.0.136 [INFO] [stderr] Checking serde_json v1.0.79 [INFO] [stderr] Checking ciborium v0.2.0 [INFO] [stderr] Checking tinytemplate v1.2.1 [INFO] [stderr] Checking criterion v0.4.0 [INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement [INFO] [stdout] --> benches/benchmark.rs:118:19 [INFO] [stdout] | [INFO] [stdout] 118 | for _x in node.parent() {} [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(for_loops_over_fallibles)]` on by default [INFO] [stdout] help: to check pattern in a loop use `while let` [INFO] [stdout] | [INFO] [stdout] 118 | while let Some(_x) = node.parent() {} [INFO] [stdout] | ~~~~~~~~~~~~~~~ ~~~ [INFO] [stdout] help: consider using `if let` to clear intent [INFO] [stdout] | [INFO] [stdout] 118 | if let Some(_x) = node.parent() {} [INFO] [stdout] | ~~~~~~~~~~~~ ~~~ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.08s [INFO] running `Command { std: "docker" "inspect" "f103b8001c109b76d92872e681dd7d9b3c0fcad0ae3b8ebb1442a1e4c1c93059", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f103b8001c109b76d92872e681dd7d9b3c0fcad0ae3b8ebb1442a1e4c1c93059", kill_on_drop: false }` [INFO] [stdout] f103b8001c109b76d92872e681dd7d9b3c0fcad0ae3b8ebb1442a1e4c1c93059