[INFO] fetching crate a4-core 0.0.4... [INFO] checking a4-core-0.0.4 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864 [INFO] extracting crate a4-core 0.0.4 into /workspace/builds/worker-2-tc2/source [INFO] validating manifest of crates.io crate a4-core 0.0.4 on toolchain 7014e13d5becc920d4bea3cd87942c8a13d359bf [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate a4-core 0.0.4 [INFO] finished tweaking crates.io crate a4-core 0.0.4 [INFO] tweaked toml for crates.io crate a4-core 0.0.4 written to /workspace/builds/worker-2-tc2/source/Cargo.toml [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Locking 20 packages to latest compatible versions [INFO] [stderr] Adding hash32 v0.2.1 (available: v0.3.1) [INFO] [stderr] Adding heapless v0.7.17 (available: v0.8.0) [INFO] [stderr] Adding postcard v0.7.3 (available: v1.0.10) [INFO] [stderr] Adding postcard-cobs v0.1.5-pre (available: v0.2.0) [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] c28d07e77ad87b774f34aae449d2850dec96d93c384c7c5971f3b793f14bdd91 [INFO] running `Command { std: "docker" "start" "-a" "c28d07e77ad87b774f34aae449d2850dec96d93c384c7c5971f3b793f14bdd91", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "c28d07e77ad87b774f34aae449d2850dec96d93c384c7c5971f3b793f14bdd91", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c28d07e77ad87b774f34aae449d2850dec96d93c384c7c5971f3b793f14bdd91", kill_on_drop: false }` [INFO] [stdout] c28d07e77ad87b774f34aae449d2850dec96d93c384c7c5971f3b793f14bdd91 [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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 9476e29ecd6962788f44bc03eea1e74b98f42ce3749a147f91b5bcc9af27c2cc [INFO] running `Command { std: "docker" "start" "-a" "9476e29ecd6962788f44bc03eea1e74b98f42ce3749a147f91b5bcc9af27c2cc", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.86 [INFO] [stderr] Compiling semver v1.0.23 [INFO] [stderr] Compiling unicode-ident v1.0.13 [INFO] [stderr] Compiling autocfg v1.3.0 [INFO] [stderr] Compiling serde v1.0.210 [INFO] [stderr] Checking scopeguard v1.2.0 [INFO] [stderr] Checking byteorder v1.5.0 [INFO] [stderr] Checking stable_deref_trait v1.2.0 [INFO] [stderr] Checking postcard-cobs v0.1.5-pre [INFO] [stderr] Checking hash32 v0.2.1 [INFO] [stderr] Compiling lock_api v0.4.12 [INFO] [stderr] Compiling rustc_version v0.4.1 [INFO] [stderr] Compiling quote v1.0.37 [INFO] [stderr] Checking spin v0.9.8 [INFO] [stderr] Compiling heapless v0.7.17 [INFO] [stderr] Compiling syn v2.0.77 [INFO] [stderr] Compiling serde_derive v1.0.210 [INFO] [stderr] Checking postcard v0.7.3 [INFO] [stderr] Checking a4-core v0.0.4 (/opt/rustwide/workdir) [INFO] [stdout] warning: field `err` is never read [INFO] [stdout] --> src/nostd_rt.rs:17:5 [INFO] [stdout] | [INFO] [stdout] 15 | pub struct HVecStack { [INFO] [stdout] | --------- field in this struct [INFO] [stdout] 16 | data: Vec, [INFO] [stdout] 17 | err: Error, [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `HVecStack` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `err` is never read [INFO] [stdout] --> src/std_rt.rs:13:5 [INFO] [stdout] | [INFO] [stdout] 11 | pub struct StdVecStack { [INFO] [stdout] | ----------- field in this struct [INFO] [stdout] 12 | data: Vec, [INFO] [stdout] 13 | err: Error, [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `StdVecStack` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `contents` is never read [INFO] [stdout] --> src/compiler.rs:248:9 [INFO] [stdout] | [INFO] [stdout] 247 | Comment { [INFO] [stdout] | ------- field in this variant [INFO] [stdout] 248 | contents: Vec, [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Chunk` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `err` is never read [INFO] [stdout] --> src/nostd_rt.rs:17:5 [INFO] [stdout] | [INFO] [stdout] 15 | pub struct HVecStack { [INFO] [stdout] | --------- field in this struct [INFO] [stdout] 16 | data: Vec, [INFO] [stdout] 17 | err: Error, [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `HVecStack` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.95s [INFO] running `Command { std: "docker" "inspect" "9476e29ecd6962788f44bc03eea1e74b98f42ce3749a147f91b5bcc9af27c2cc", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "9476e29ecd6962788f44bc03eea1e74b98f42ce3749a147f91b5bcc9af27c2cc", kill_on_drop: false }` [INFO] [stdout] 9476e29ecd6962788f44bc03eea1e74b98f42ce3749a147f91b5bcc9af27c2cc