[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/beta-1.38-1/sources/1.37.0/gh/muktakosh/unicorn"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/muktakosh/unicorn'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/muktakosh/unicorn" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/muktakosh/unicorn"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/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 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of muktakosh/unicorn on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "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/beta-1.38-1/sources/1.37.0/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/beta-1.38-1/sources/beta-2019-08-13/gh/muktakosh/unicorn/Cargo.toml
[INFO] crate muktakosh/unicorn already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing muktakosh/unicorn against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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=warn" "-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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] d74ad3b7721e5a919b1e898703afe719a07949e9dc7603fd9f13e9a036e3d6c1
[INFO] running `"docker" "start" "-a" "d74ad3b7721e5a919b1e898703afe719a07949e9dc7603fd9f13e9a036e3d6c1"`
[INFO] [stderr]    Compiling serde v0.8.21
[INFO] [stderr]    Compiling syntex_pos v0.52.0
[INFO] [stderr]    Compiling syn v0.10.5
[INFO] [stderr]    Compiling net2 v0.2.26
[INFO] [stderr]    Compiling nix v0.5.1
[INFO] [stderr]    Compiling clap v2.19.2
[INFO] [stderr]    Compiling term v0.4.4
[INFO] [stderr]    Compiling miow v0.1.5
[INFO] [stderr]    Compiling syntex_errors v0.52.0
[INFO] [stderr]    Compiling serde_codegen_internals v0.11.3
[INFO] [stderr]    Compiling syntex_syntax v0.52.0
[INFO] [stderr]    Compiling mio v0.5.1
[INFO] [stderr]    Compiling ws v0.5.3
[INFO] [stderr]    Compiling serde_json v0.8.4
[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]     Finished dev [unoptimized + debuginfo] target(s) in 1m 22s
[INFO] running `"docker" "inspect" "d74ad3b7721e5a919b1e898703afe719a07949e9dc7603fd9f13e9a036e3d6c1"`
[INFO] running `"docker" "rm" "-f" "d74ad3b7721e5a919b1e898703afe719a07949e9dc7603fd9f13e9a036e3d6c1"`
[INFO] [stdout] d74ad3b7721e5a919b1e898703afe719a07949e9dc7603fd9f13e9a036e3d6c1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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=warn" "-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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] ae2ca895de7d4867859d1116e69c1a404529166bdce9978483bb3ddd0b052bc6
[INFO] running `"docker" "start" "-a" "ae2ca895de7d4867859d1116e69c1a404529166bdce9978483bb3ddd0b052bc6"`
[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]     Finished dev [unoptimized + debuginfo] target(s) in 2.06s
[INFO] running `"docker" "inspect" "ae2ca895de7d4867859d1116e69c1a404529166bdce9978483bb3ddd0b052bc6"`
[INFO] running `"docker" "rm" "-f" "ae2ca895de7d4867859d1116e69c1a404529166bdce9978483bb3ddd0b052bc6"`
[INFO] [stdout] ae2ca895de7d4867859d1116e69c1a404529166bdce9978483bb3ddd0b052bc6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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=warn" "-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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 27f04b404be8915462bee45bed2c27fa85800d5d3741865a1cac44a9443d1250
[INFO] running `"docker" "start" "-a" "27f04b404be8915462bee45bed2c27fa85800d5d3741865a1cac44a9443d1250"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.10s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/unicorn-10991a643ab0e7c8
[INFO] [stderr]      Running /opt/crater/target/debug/deps/unicorn-85bb64d8bf5dfb1f
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests unicorn
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "27f04b404be8915462bee45bed2c27fa85800d5d3741865a1cac44a9443d1250"`
[INFO] running `"docker" "rm" "-f" "27f04b404be8915462bee45bed2c27fa85800d5d3741865a1cac44a9443d1250"`
[INFO] [stdout] 27f04b404be8915462bee45bed2c27fa85800d5d3741865a1cac44a9443d1250