[INFO] updating cached repository hinohi/rust-bfi
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/hinohi/rust-bfi
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/hinohi/rust-bfi" "work/ex/beta-1.38-1/sources/1.37.0/gh/hinohi/rust-bfi"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/hinohi/rust-bfi'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/hinohi/rust-bfi" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/hinohi/rust-bfi"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/hinohi/rust-bfi'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 175b263486aee63733ca96d86e9a592b817cf979
[INFO] sha for GitHub repo hinohi/rust-bfi: 175b263486aee63733ca96d86e9a592b817cf979
[INFO] validating manifest of hinohi/rust-bfi 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 hinohi/rust-bfi 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 hinohi/rust-bfi
[INFO] finished frobbing hinohi/rust-bfi
[INFO] frobbed toml for hinohi/rust-bfi written to work/ex/beta-1.38-1/sources/1.37.0/gh/hinohi/rust-bfi/Cargo.toml
[INFO] started frobbing hinohi/rust-bfi
[INFO] finished frobbing hinohi/rust-bfi
[INFO] frobbed toml for hinohi/rust-bfi written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/hinohi/rust-bfi/Cargo.toml
[INFO] crate hinohi/rust-bfi 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 hinohi/rust-bfi 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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/hinohi/rust-bfi:/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] cb82aaf13b2a8441bc6a4d589ecd84c94cfcccf20e1498bbb19a3c28c984d9d7
[INFO] running `"docker" "start" "-a" "cb82aaf13b2a8441bc6a4d589ecd84c94cfcccf20e1498bbb19a3c28c984d9d7"`
[INFO] [stderr]    Compiling rust-bfi v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:131:25
[INFO] [stderr]     |
[INFO] [stderr] 131 |                     let mut loop_dst = AST::_optimize_merge(loop_src);
[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 1.77s
[INFO] running `"docker" "inspect" "cb82aaf13b2a8441bc6a4d589ecd84c94cfcccf20e1498bbb19a3c28c984d9d7"`
[INFO] running `"docker" "rm" "-f" "cb82aaf13b2a8441bc6a4d589ecd84c94cfcccf20e1498bbb19a3c28c984d9d7"`
[INFO] [stdout] cb82aaf13b2a8441bc6a4d589ecd84c94cfcccf20e1498bbb19a3c28c984d9d7
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/hinohi/rust-bfi:/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] 728c1063c65ad5b0d8cd91a1e0fb881e50f05fd889ea98096a17afbf39e92f77
[INFO] running `"docker" "start" "-a" "728c1063c65ad5b0d8cd91a1e0fb881e50f05fd889ea98096a17afbf39e92f77"`
[INFO] [stderr]    Compiling rust-bfi v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:131:25
[INFO] [stderr]     |
[INFO] [stderr] 131 |                     let mut loop_dst = AST::_optimize_merge(loop_src);
[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 0.86s
[INFO] running `"docker" "inspect" "728c1063c65ad5b0d8cd91a1e0fb881e50f05fd889ea98096a17afbf39e92f77"`
[INFO] running `"docker" "rm" "-f" "728c1063c65ad5b0d8cd91a1e0fb881e50f05fd889ea98096a17afbf39e92f77"`
[INFO] [stdout] 728c1063c65ad5b0d8cd91a1e0fb881e50f05fd889ea98096a17afbf39e92f77
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/hinohi/rust-bfi:/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] 0b24c42d7ddb5b2834d2f25aef32efea8c4aeb2eb7676196cc08439fe027b43c
[INFO] running `"docker" "start" "-a" "0b24c42d7ddb5b2834d2f25aef32efea8c4aeb2eb7676196cc08439fe027b43c"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_bfi-73c1273c20488ffb
[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" "0b24c42d7ddb5b2834d2f25aef32efea8c4aeb2eb7676196cc08439fe027b43c"`
[INFO] running `"docker" "rm" "-f" "0b24c42d7ddb5b2834d2f25aef32efea8c4aeb2eb7676196cc08439fe027b43c"`
[INFO] [stdout] 0b24c42d7ddb5b2834d2f25aef32efea8c4aeb2eb7676196cc08439fe027b43c