[INFO] cloning repository https://github.com/kahirokunn/kahirofs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kahirokunn/kahirofs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkahirokunn%2Fkahirofs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkahirokunn%2Fkahirofs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bc934a856014484b1180196233f202be825a02d0
[INFO] checking kahirokunn/kahirofs against master#a26e97be8826d408309fffbd8168362365719f50 for pr-136776
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkahirokunn%2Fkahirofs" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kahirokunn/kahirofs on toolchain a26e97be8826d408309fffbd8168362365719f50
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a26e97be8826d408309fffbd8168362365719f50" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kahirokunn/kahirofs
[INFO] finished tweaking git repo https://github.com/kahirokunn/kahirofs
[INFO] tweaked toml for git repo https://github.com/kahirokunn/kahirofs written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/kahirokunn/kahirofs 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" "+a26e97be8826d408309fffbd8168362365719f50" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+a26e97be8826d408309fffbd8168362365719f50" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ea88a88132b6cdf2d4b71fab2f166faf692eee2f7da8622b8d18821efb8074e2
[INFO] running `Command { std: "docker" "start" "-a" "ea88a88132b6cdf2d4b71fab2f166faf692eee2f7da8622b8d18821efb8074e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ea88a88132b6cdf2d4b71fab2f166faf692eee2f7da8622b8d18821efb8074e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea88a88132b6cdf2d4b71fab2f166faf692eee2f7da8622b8d18821efb8074e2", kill_on_drop: false }`
[INFO] [stdout] ea88a88132b6cdf2d4b71fab2f166faf692eee2f7da8622b8d18821efb8074e2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+a26e97be8826d408309fffbd8168362365719f50" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 28391f23df1d7573a6d4a77896de5808c53c8e9139a4134999772a7fd1d155be
[INFO] running `Command { std: "docker" "start" "-a" "28391f23df1d7573a6d4a77896de5808c53c8e9139a4134999772a7fd1d155be", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking thread-scoped v1.0.2
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]    Compiling fuse v0.3.1
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking env_logger v0.9.0
[INFO] [stderr]     Checking kahirofs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:182:18
[INFO] [stdout]     |
[INFO] [stdout] 182 |             Some(mut f) => {
[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: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:182:18
[INFO] [stdout]     |
[INFO] [stdout] 182 |             Some(mut f) => {
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.32s
[INFO] running `Command { std: "docker" "inspect" "28391f23df1d7573a6d4a77896de5808c53c8e9139a4134999772a7fd1d155be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28391f23df1d7573a6d4a77896de5808c53c8e9139a4134999772a7fd1d155be", kill_on_drop: false }`
[INFO] [stdout] 28391f23df1d7573a6d4a77896de5808c53c8e9139a4134999772a7fd1d155be
