[INFO] fetching crate pepper 0.31.0...
[INFO] checking pepper-0.31.0 against master#19dd9535408db0f1ff3d16613619076aef524d19 for pr-115950
[INFO] extracting crate pepper 0.31.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate pepper 0.31.0 on toolchain 19dd9535408db0f1ff3d16613619076aef524d19
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+19dd9535408db0f1ff3d16613619076aef524d19" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pepper 0.31.0
[INFO] finished tweaking crates.io crate pepper 0.31.0
[INFO] tweaked toml for crates.io crate pepper 0.31.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate pepper 0.31.0 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" "+19dd9535408db0f1ff3d16613619076aef524d19" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded libc v0.2.139
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+19dd9535408db0f1ff3d16613619076aef524d19" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 58231755f9d0795b11d2e86d67a9e8e271b4bb86c06a5a7f1a78f1e6293bc2bc
[INFO] running `Command { std: "docker" "start" "-a" "58231755f9d0795b11d2e86d67a9e8e271b4bb86c06a5a7f1a78f1e6293bc2bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "58231755f9d0795b11d2e86d67a9e8e271b4bb86c06a5a7f1a78f1e6293bc2bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58231755f9d0795b11d2e86d67a9e8e271b4bb86c06a5a7f1a78f1e6293bc2bc", kill_on_drop: false }`
[INFO] [stdout] 58231755f9d0795b11d2e86d67a9e8e271b4bb86c06a5a7f1a78f1e6293bc2bc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+19dd9535408db0f1ff3d16613619076aef524d19" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 53947d576fbde934e782c6aa6cfb660404621fec77ac06efa395d387ff3b6fd7
[INFO] running `Command { std: "docker" "start" "-a" "53947d576fbde934e782c6aa6cfb660404621fec77ac06efa395d387ff3b6fd7", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]     Checking pepper v0.31.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/events.rs:201:17
[INFO] [stdout]     |
[INFO] [stdout] 201 |                 std::mem::drop(range_deletes);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^-------------^
[INFO] [stdout]     |                                |
[INFO] [stdout]     |                                argument has type `&mut BufferRangeDeletesMutGuard<'_>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/events.rs:220:17
[INFO] [stdout]     |
[INFO] [stdout] 220 |                 std::mem::drop(text_inserts);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^------------^
[INFO] [stdout]     |                                |
[INFO] [stdout]     |                                argument has type `&mut BufferTextInsertsMutGuard<'_>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/events.rs:201:17
[INFO] [stdout]     |
[INFO] [stdout] 201 |                 std::mem::drop(range_deletes);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^-------------^
[INFO] [stdout]     |                                |
[INFO] [stdout]     |                                argument has type `&mut BufferRangeDeletesMutGuard<'_>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]    --> src/events.rs:220:17
[INFO] [stdout]     |
[INFO] [stdout] 220 |                 std::mem::drop(text_inserts);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^------------^
[INFO] [stdout]     |                                |
[INFO] [stdout]     |                                argument has type `&mut BufferTextInsertsMutGuard<'_>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `let _ = ...` to ignore the expression or result
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.36s
[INFO] running `Command { std: "docker" "inspect" "53947d576fbde934e782c6aa6cfb660404621fec77ac06efa395d387ff3b6fd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53947d576fbde934e782c6aa6cfb660404621fec77ac06efa395d387ff3b6fd7", kill_on_drop: false }`
[INFO] [stdout] 53947d576fbde934e782c6aa6cfb660404621fec77ac06efa395d387ff3b6fd7