[INFO] updating cached repository muktakosh/unicorn
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/muktakosh/unicorn
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/muktakosh/unicorn" "work/ex/pr-57321/sources/master#c0bbc3927e28c22edefe6a1353b5ecc95ea9a104/gh/muktakosh/unicorn"`
[INFO] [stderr] Cloning into 'work/ex/pr-57321/sources/master#c0bbc3927e28c22edefe6a1353b5ecc95ea9a104/gh/muktakosh/unicorn'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/muktakosh/unicorn" "work/ex/pr-57321/sources/try#b9139d2caca1db46014a9c302d5c47cfae0d8ae0/gh/muktakosh/unicorn"`
[INFO] [stderr] Cloning into 'work/ex/pr-57321/sources/try#b9139d2caca1db46014a9c302d5c47cfae0d8ae0/gh/muktakosh/unicorn'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 55b0a35021b16ac3e8ca162e57bd8c70748fbf0b
[INFO] sha for GitHub repo muktakosh/unicorn: 55b0a35021b16ac3e8ca162e57bd8c70748fbf0b
[INFO] validating manifest of muktakosh/unicorn on toolchain master#c0bbc3927e28c22edefe6a1353b5ecc95ea9a104
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0bbc3927e28c22edefe6a1353b5ecc95ea9a104-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of muktakosh/unicorn on toolchain try#b9139d2caca1db46014a9c302d5c47cfae0d8ae0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b9139d2caca1db46014a9c302d5c47cfae0d8ae0-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing muktakosh/unicorn
[INFO] finished frobbing muktakosh/unicorn
[INFO] frobbed toml for muktakosh/unicorn written to work/ex/pr-57321/sources/master#c0bbc3927e28c22edefe6a1353b5ecc95ea9a104/gh/muktakosh/unicorn/Cargo.toml
[INFO] started frobbing muktakosh/unicorn
[INFO] finished frobbing muktakosh/unicorn
[INFO] frobbed toml for muktakosh/unicorn written to work/ex/pr-57321/sources/try#b9139d2caca1db46014a9c302d5c47cfae0d8ae0/gh/muktakosh/unicorn/Cargo.toml
[INFO] crate muktakosh/unicorn has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0bbc3927e28c22edefe6a1353b5ecc95ea9a104-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b9139d2caca1db46014a9c302d5c47cfae0d8ae0-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking muktakosh/unicorn against try#b9139d2caca1db46014a9c302d5c47cfae0d8ae0 for pr-57321
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57321/worker-1/try#b9139d2caca1db46014a9c302d5c47cfae0d8ae0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57321/sources/try#b9139d2caca1db46014a9c302d5c47cfae0d8ae0/gh/muktakosh/unicorn:/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" "+b9139d2caca1db46014a9c302d5c47cfae0d8ae0-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] b5ac900cce0d3ad7415a77ebdf043f180cf139287622041ad1ff28264db9262a
[INFO] running `"docker" "start" "-a" "b5ac900cce0d3ad7415a77ebdf043f180cf139287622041ad1ff28264db9262a"`
[INFO] [stderr]    Compiling winapi v0.2.8
[INFO] [stderr]    Compiling rustc-serialize v0.3.22
[INFO] [stderr]    Compiling libc v0.2.18
[INFO] [stderr]     Checking serde v0.8.21
[INFO] [stderr]     Checking net2 v0.2.26
[INFO] [stderr]     Checking nix v0.5.1
[INFO] [stderr]    Compiling serde_codegen_internals v0.11.3
[INFO] [stderr]     Checking miow v0.1.5
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]    Compiling term v0.4.4
[INFO] [stderr]     Checking mio v0.5.1
[INFO] [stderr]     Checking ws v0.5.3
[INFO] [stderr]     Checking serde_json v0.8.4
[INFO] [stderr]    Compiling syntex_pos v0.52.0
[INFO] [stderr]    Compiling syntex_errors v0.52.0
[INFO] [stderr]    Compiling syntex_syntax v0.52.0
[INFO] [stderr]    Compiling syntex v0.52.0
[INFO] [stderr]    Compiling serde_codegen v0.8.21
[INFO] [stderr]    Compiling libunicorn v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/router.rs:80:21
[INFO] [stderr]    |
[INFO] [stderr] 80 |         if let Some(mut t) = self.topics.get_mut(topic_id) {
[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/router.rs:80:21
[INFO] [stderr]    |
[INFO] [stderr] 80 |         if let Some(mut t) = self.topics.get_mut(topic_id) {
[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 1m 28s
[INFO] running `"docker" "inspect" "b5ac900cce0d3ad7415a77ebdf043f180cf139287622041ad1ff28264db9262a"`
[INFO] running `"docker" "rm" "-f" "b5ac900cce0d3ad7415a77ebdf043f180cf139287622041ad1ff28264db9262a"`
[INFO] [stdout] b5ac900cce0d3ad7415a77ebdf043f180cf139287622041ad1ff28264db9262a