[INFO] updating cached repository roycrippen/filter_conditionals
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/roycrippen/filter_conditionals
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/roycrippen/filter_conditionals" "work/ex/beta-1.38-1/sources/1.37.0/gh/roycrippen/filter_conditionals"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/roycrippen/filter_conditionals'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/roycrippen/filter_conditionals" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/roycrippen/filter_conditionals"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/roycrippen/filter_conditionals'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 330f2d1ff05bc53a1675e509946f2fadfcd5c74f
[INFO] sha for GitHub repo roycrippen/filter_conditionals: 330f2d1ff05bc53a1675e509946f2fadfcd5c74f
[INFO] validating manifest of roycrippen/filter_conditionals 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 roycrippen/filter_conditionals 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 roycrippen/filter_conditionals
[INFO] finished frobbing roycrippen/filter_conditionals
[INFO] frobbed toml for roycrippen/filter_conditionals written to work/ex/beta-1.38-1/sources/1.37.0/gh/roycrippen/filter_conditionals/Cargo.toml
[INFO] started frobbing roycrippen/filter_conditionals
[INFO] finished frobbing roycrippen/filter_conditionals
[INFO] frobbed toml for roycrippen/filter_conditionals written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/roycrippen/filter_conditionals/Cargo.toml
[INFO] crate roycrippen/filter_conditionals 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 roycrippen/filter_conditionals 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-4/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/roycrippen/filter_conditionals:/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] 8648de95ae7e5f264e9f2c097a93cd99131fd7c678d35679026774246c21545e
[INFO] running `"docker" "start" "-a" "8648de95ae7e5f264e9f2c097a93cd99131fd7c678d35679026774246c21545e"`
[INFO] [stderr]    Compiling filter_conditionals v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:25:17
[INFO] [stderr]    |
[INFO] [stderr] 25 |             let mut ss = read_file(&full_file);
[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 2.98s
[INFO] running `"docker" "inspect" "8648de95ae7e5f264e9f2c097a93cd99131fd7c678d35679026774246c21545e"`
[INFO] running `"docker" "rm" "-f" "8648de95ae7e5f264e9f2c097a93cd99131fd7c678d35679026774246c21545e"`
[INFO] [stdout] 8648de95ae7e5f264e9f2c097a93cd99131fd7c678d35679026774246c21545e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/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/roycrippen/filter_conditionals:/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] 1348bfa904c81b0881f03160341f724be0423ccfd920777175ef6daee1e587f3
[INFO] running `"docker" "start" "-a" "1348bfa904c81b0881f03160341f724be0423ccfd920777175ef6daee1e587f3"`
[INFO] [stderr]    Compiling filter_conditionals v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:25:17
[INFO] [stderr]    |
[INFO] [stderr] 25 |             let mut ss = read_file(&full_file);
[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 1.40s
[INFO] running `"docker" "inspect" "1348bfa904c81b0881f03160341f724be0423ccfd920777175ef6daee1e587f3"`
[INFO] running `"docker" "rm" "-f" "1348bfa904c81b0881f03160341f724be0423ccfd920777175ef6daee1e587f3"`
[INFO] [stdout] 1348bfa904c81b0881f03160341f724be0423ccfd920777175ef6daee1e587f3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/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/roycrippen/filter_conditionals:/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] 4e498a079966c0c8b95455a34624e57f38f5953cee10a833df77cb5044862fea
[INFO] running `"docker" "start" "-a" "4e498a079966c0c8b95455a34624e57f38f5953cee10a833df77cb5044862fea"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/filter_conditionals-59edf1fd36b43bfd
[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]      Running /opt/crater/target/debug/deps/filter_conditionals-847eb49fadb1f8e7
[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 filter_conditionals
[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" "4e498a079966c0c8b95455a34624e57f38f5953cee10a833df77cb5044862fea"`
[INFO] running `"docker" "rm" "-f" "4e498a079966c0c8b95455a34624e57f38f5953cee10a833df77cb5044862fea"`
[INFO] [stdout] 4e498a079966c0c8b95455a34624e57f38f5953cee10a833df77cb5044862fea