[INFO] updating cached repository tmwbook/rcsim
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/tmwbook/rcsim
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/tmwbook/rcsim" "work/ex/beta-1.38-1/sources/1.37.0/gh/tmwbook/rcsim"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/tmwbook/rcsim'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/tmwbook/rcsim" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tmwbook/rcsim"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tmwbook/rcsim'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 22f1998f1e470405db844ee6c7a5b81547a617c5
[INFO] sha for GitHub repo tmwbook/rcsim: 22f1998f1e470405db844ee6c7a5b81547a617c5
[INFO] validating manifest of tmwbook/rcsim 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 tmwbook/rcsim 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 tmwbook/rcsim
[INFO] finished frobbing tmwbook/rcsim
[INFO] frobbed toml for tmwbook/rcsim written to work/ex/beta-1.38-1/sources/1.37.0/gh/tmwbook/rcsim/Cargo.toml
[INFO] started frobbing tmwbook/rcsim
[INFO] finished frobbing tmwbook/rcsim
[INFO] frobbed toml for tmwbook/rcsim written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tmwbook/rcsim/Cargo.toml
[INFO] crate tmwbook/rcsim 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 tmwbook/rcsim against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/tmwbook/rcsim:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 59bb4c719d70201ea8ab98d093d5c6e49825b60c1d6f18e560efcb5e8819b7a1
[INFO] running `"docker" "start" "-a" "59bb4c719d70201ea8ab98d093d5c6e49825b60c1d6f18e560efcb5e8819b7a1"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling atty v0.2.3
[INFO] [stderr]    Compiling clap v2.29.0
[INFO] [stderr]    Compiling rcsim v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `line`
[INFO] [stderr]   --> src/main.rs:73:21
[INFO] [stderr]    |
[INFO] [stderr] 73 |             let mut line = CacheLine{valid: false, tag: 0};
[INFO] [stderr]    |                     ^^^^ help: consider prefixing with an underscore: `_line`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:50:9
[INFO] [stderr]    |
[INFO] [stderr] 50 |     let mut stats = Statistics {misses: 0, hits: 0, evictions: 0};
[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/main.rs:71:13
[INFO] [stderr]    |
[INFO] [stderr] 71 |         let mut lines: Vec<CacheLine> = Vec::new();
[INFO] [stderr]    |             ----^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:73:17
[INFO] [stderr]    |
[INFO] [stderr] 73 |             let mut line = CacheLine{valid: false, tag: 0};
[INFO] [stderr]    |                 ----^^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 26.38s
[INFO] running `"docker" "inspect" "59bb4c719d70201ea8ab98d093d5c6e49825b60c1d6f18e560efcb5e8819b7a1"`
[INFO] running `"docker" "rm" "-f" "59bb4c719d70201ea8ab98d093d5c6e49825b60c1d6f18e560efcb5e8819b7a1"`
[INFO] [stdout] 59bb4c719d70201ea8ab98d093d5c6e49825b60c1d6f18e560efcb5e8819b7a1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/tmwbook/rcsim:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] e11b26e880b183522b42dee959a462e6036da43b14c9c5fc7c4888b875cbf3b6
[INFO] running `"docker" "start" "-a" "e11b26e880b183522b42dee959a462e6036da43b14c9c5fc7c4888b875cbf3b6"`
[INFO] [stderr]    Compiling rcsim v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `line`
[INFO] [stderr]   --> src/main.rs:73:21
[INFO] [stderr]    |
[INFO] [stderr] 73 |             let mut line = CacheLine{valid: false, tag: 0};
[INFO] [stderr]    |                     ^^^^ help: consider prefixing with an underscore: `_line`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:50:9
[INFO] [stderr]    |
[INFO] [stderr] 50 |     let mut stats = Statistics {misses: 0, hits: 0, evictions: 0};
[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/main.rs:71:13
[INFO] [stderr]    |
[INFO] [stderr] 71 |         let mut lines: Vec<CacheLine> = Vec::new();
[INFO] [stderr]    |             ----^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:73:17
[INFO] [stderr]    |
[INFO] [stderr] 73 |             let mut line = CacheLine{valid: false, tag: 0};
[INFO] [stderr]    |                 ----^^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.82s
[INFO] running `"docker" "inspect" "e11b26e880b183522b42dee959a462e6036da43b14c9c5fc7c4888b875cbf3b6"`
[INFO] running `"docker" "rm" "-f" "e11b26e880b183522b42dee959a462e6036da43b14c9c5fc7c4888b875cbf3b6"`
[INFO] [stdout] e11b26e880b183522b42dee959a462e6036da43b14c9c5fc7c4888b875cbf3b6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/tmwbook/rcsim:/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 902019d785539631ae9eec3cf86cff207cb2aa3f4e6698f38720c11706d5ce93
[INFO] running `"docker" "start" "-a" "902019d785539631ae9eec3cf86cff207cb2aa3f4e6698f38720c11706d5ce93"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rcsim-e281ee1d305a7c35
[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" "902019d785539631ae9eec3cf86cff207cb2aa3f4e6698f38720c11706d5ce93"`
[INFO] running `"docker" "rm" "-f" "902019d785539631ae9eec3cf86cff207cb2aa3f4e6698f38720c11706d5ce93"`
[INFO] [stdout] 902019d785539631ae9eec3cf86cff207cb2aa3f4e6698f38720c11706d5ce93