[INFO] updating cached repository stepchowfun/tagref
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/stepchowfun/tagref
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/stepchowfun/tagref" "work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/stepchowfun/tagref"`
[INFO] [stderr] Cloning into 'work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/stepchowfun/tagref'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/stepchowfun/tagref" "work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/stepchowfun/tagref"`
[INFO] [stderr] Cloning into 'work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/stepchowfun/tagref'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 07351e39f9fd9d1ef38d89c926ced4de9f2f0a49
[INFO] sha for GitHub repo stepchowfun/tagref: 07351e39f9fd9d1ef38d89c926ced4de9f2f0a49
[INFO] validating manifest of stepchowfun/tagref on toolchain master#e305df1846a6d985315917ae0c81b74af8b4e641
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of stepchowfun/tagref on toolchain try#99a7498759a22b5684caf798a98b7e90ad9d2443
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing stepchowfun/tagref
[INFO] finished frobbing stepchowfun/tagref
[INFO] frobbed toml for stepchowfun/tagref written to work/ex/pr-60039-1/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/gh/stepchowfun/tagref/Cargo.toml
[INFO] started frobbing stepchowfun/tagref
[INFO] finished frobbing stepchowfun/tagref
[INFO] frobbed toml for stepchowfun/tagref written to work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/stepchowfun/tagref/Cargo.toml
[INFO] crate stepchowfun/tagref already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking stepchowfun/tagref against try#99a7498759a22b5684caf798a98b7e90ad9d2443 for pr-60039-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-60039-1/worker-3/try#99a7498759a22b5684caf798a98b7e90ad9d2443:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-60039-1/sources/try#99a7498759a22b5684caf798a98b7e90ad9d2443/gh/stepchowfun/tagref:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+99a7498759a22b5684caf798a98b7e90ad9d2443-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] dc7edcb27c7fb588df18f3bb1aa4928d1e0349e3b4b04580a5178ab0e8cad380
[INFO] running `"docker" "start" "-a" "dc7edcb27c7fb588df18f3bb1aa4928d1e0349e3b4b04580a5178ab0e8cad380"`
[INFO] [stderr]     Checking term_size v0.3.1
[INFO] [stderr]     Checking walkdir v2.1.4
[INFO] [stderr]     Checking colored v1.6.0
[INFO] [stderr]     Checking regex v0.2.11
[INFO] [stderr]     Checking regex v1.0.0
[INFO] [stderr]     Checking textwrap v0.9.0
[INFO] [stderr]     Checking clap v2.31.2
[INFO] [stderr]     Checking globset v0.4.0
[INFO] [stderr]     Checking ignore v0.4.2
[INFO] [stderr]     Checking tagref v0.0.5 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/walk.rs:16:13
[INFO] [stderr]    |
[INFO] [stderr] 16 |         let mut possible_file = File::open(dir_entry.path());
[INFO] [stderr]    |             ----^^^^^^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/walk.rs:16:13
[INFO] [stderr]    |
[INFO] [stderr] 16 |         let mut possible_file = File::open(dir_entry.path());
[INFO] [stderr]    |             ----^^^^^^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.31s
[INFO] running `"docker" "inspect" "dc7edcb27c7fb588df18f3bb1aa4928d1e0349e3b4b04580a5178ab0e8cad380"`
[INFO] running `"docker" "rm" "-f" "dc7edcb27c7fb588df18f3bb1aa4928d1e0349e3b4b04580a5178ab0e8cad380"`
[INFO] [stdout] dc7edcb27c7fb588df18f3bb1aa4928d1e0349e3b4b04580a5178ab0e8cad380