[INFO] fetching crate frankencell 0.2.0... [INFO] checking frankencell-0.2.0 against master#f167efad2f51088d86180ee89177b3d7c9e7c2f5 for pr-129543 [INFO] extracting crate frankencell 0.2.0 into /workspace/builds/worker-4-tc1/source [INFO] validating manifest of crates.io crate frankencell 0.2.0 on toolchain f167efad2f51088d86180ee89177b3d7c9e7c2f5 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate frankencell 0.2.0 [INFO] finished tweaking crates.io crate frankencell 0.2.0 [INFO] tweaked toml for crates.io crate frankencell 0.2.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml [INFO] crate crates.io crate frankencell 0.2.0 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" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 6449ef36e75f01e7ffa272f8c8e112720ed484e26a071f6daa0aae7d14692d77 [INFO] running `Command { std: "docker" "start" "-a" "6449ef36e75f01e7ffa272f8c8e112720ed484e26a071f6daa0aae7d14692d77", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "6449ef36e75f01e7ffa272f8c8e112720ed484e26a071f6daa0aae7d14692d77", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "6449ef36e75f01e7ffa272f8c8e112720ed484e26a071f6daa0aae7d14692d77", kill_on_drop: false }` [INFO] [stdout] 6449ef36e75f01e7ffa272f8c8e112720ed484e26a071f6daa0aae7d14692d77 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 25909477d1c96ca77170e9aac52923a5850af9da29a0f2a554014e867bfc52ac [INFO] running `Command { std: "docker" "start" "-a" "25909477d1c96ca77170e9aac52923a5850af9da29a0f2a554014e867bfc52ac", kill_on_drop: false }` [INFO] [stderr] Checking frankencell v0.2.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing [INFO] [stdout] --> examples/arena.rs:88:5 [INFO] [stdout] | [INFO] [stdout] 88 | drop(b); [INFO] [stdout] | ^^^^^-^ [INFO] [stdout] | | [INFO] [stdout] | argument has type `&char` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dropping_references)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the expression or result [INFO] [stdout] | [INFO] [stdout] 88 - drop(b); [INFO] [stdout] 88 + let _ = b; [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing [INFO] [stdout] --> examples/arena.rs:89:5 [INFO] [stdout] | [INFO] [stdout] 89 | drop(a); [INFO] [stdout] | ^^^^^-^ [INFO] [stdout] | | [INFO] [stdout] | argument has type `&mut char` [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the expression or result [INFO] [stdout] | [INFO] [stdout] 89 - drop(a); [INFO] [stdout] 89 + let _ = a; [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.55s [INFO] running `Command { std: "docker" "inspect" "25909477d1c96ca77170e9aac52923a5850af9da29a0f2a554014e867bfc52ac", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "25909477d1c96ca77170e9aac52923a5850af9da29a0f2a554014e867bfc52ac", kill_on_drop: false }` [INFO] [stdout] 25909477d1c96ca77170e9aac52923a5850af9da29a0f2a554014e867bfc52ac