[INFO] fetching crate shm 0.1.0...
[INFO] checking shm-0.1.0 against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] extracting crate shm 0.1.0 into /workspace/builds/worker-100/source
[INFO] validating manifest of crates.io crate shm 0.1.0 on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate shm 0.1.0
[INFO] finished tweaking crates.io crate shm 0.1.0
[INFO] tweaked toml for crates.io crate shm 0.1.0 written to /workspace/builds/worker-100/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a4d6ab7cd815f44cf4a09b88b2fbb7912cd099ba0051271654518cc72b229afc
[INFO] running `Command { std: "docker" "start" "-a" "a4d6ab7cd815f44cf4a09b88b2fbb7912cd099ba0051271654518cc72b229afc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a4d6ab7cd815f44cf4a09b88b2fbb7912cd099ba0051271654518cc72b229afc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4d6ab7cd815f44cf4a09b88b2fbb7912cd099ba0051271654518cc72b229afc", kill_on_drop: false }`
[INFO] [stdout] a4d6ab7cd815f44cf4a09b88b2fbb7912cd099ba0051271654518cc72b229afc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2b9bf145527e43d9ef2e70a7bcadafa7753d4c96625236f0dcd53ff5ac7b39bd
[INFO] running `Command { std: "docker" "start" "-a" "2b9bf145527e43d9ef2e70a7bcadafa7753d4c96625236f0dcd53ff5ac7b39bd", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking shm v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> examples/box.rs:18:21
[INFO] [stdout]    |
[INFO] [stdout] 18 |                 let mut data: &mut Box = unsafe {
[INFO] [stdout]    |                     ----^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.01s
[INFO] running `Command { std: "docker" "inspect" "2b9bf145527e43d9ef2e70a7bcadafa7753d4c96625236f0dcd53ff5ac7b39bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b9bf145527e43d9ef2e70a7bcadafa7753d4c96625236f0dcd53ff5ac7b39bd", kill_on_drop: false }`
[INFO] [stdout] 2b9bf145527e43d9ef2e70a7bcadafa7753d4c96625236f0dcd53ff5ac7b39bd