[INFO] updating cached repository monsieursquirrel/lychrel
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/monsieursquirrel/lychrel
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/monsieursquirrel/lychrel" "work/ex/beta-1.38-1/sources/1.37.0/gh/monsieursquirrel/lychrel"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/monsieursquirrel/lychrel'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/monsieursquirrel/lychrel" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/monsieursquirrel/lychrel"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/monsieursquirrel/lychrel'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] cf4204c8ed1fad3163c45106a778f15800cd0bac
[INFO] sha for GitHub repo monsieursquirrel/lychrel: cf4204c8ed1fad3163c45106a778f15800cd0bac
[INFO] validating manifest of monsieursquirrel/lychrel 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 monsieursquirrel/lychrel 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 monsieursquirrel/lychrel
[INFO] finished frobbing monsieursquirrel/lychrel
[INFO] frobbed toml for monsieursquirrel/lychrel written to work/ex/beta-1.38-1/sources/1.37.0/gh/monsieursquirrel/lychrel/Cargo.toml
[INFO] started frobbing monsieursquirrel/lychrel
[INFO] finished frobbing monsieursquirrel/lychrel
[INFO] frobbed toml for monsieursquirrel/lychrel written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/monsieursquirrel/lychrel/Cargo.toml
[INFO] crate monsieursquirrel/lychrel 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/monsieursquirrel/lychrel/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 monsieursquirrel/lychrel 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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/monsieursquirrel/lychrel:/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] f30fde7ff0b7cb1d18990f7236aeabf18efe8328c4086098adbdc861c27b5a86
[INFO] running `"docker" "start" "-a" "f30fde7ff0b7cb1d18990f7236aeabf18efe8328c4086098adbdc861c27b5a86"`
[INFO] [stderr]    Compiling lychrel v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> src/main.rs:64:14
[INFO] [stderr]    |
[INFO] [stderr] 64 |     for i in (1..(max_num + 1)) {
[INFO] [stderr]    |              ^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.47s
[INFO] running `"docker" "inspect" "f30fde7ff0b7cb1d18990f7236aeabf18efe8328c4086098adbdc861c27b5a86"`
[INFO] running `"docker" "rm" "-f" "f30fde7ff0b7cb1d18990f7236aeabf18efe8328c4086098adbdc861c27b5a86"`
[INFO] [stdout] f30fde7ff0b7cb1d18990f7236aeabf18efe8328c4086098adbdc861c27b5a86
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/monsieursquirrel/lychrel:/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] c2bcdb77f801f8ccbf7c8194612a99eb50f9d2d258ad0d6b63ccf16900f19aca
[INFO] running `"docker" "start" "-a" "c2bcdb77f801f8ccbf7c8194612a99eb50f9d2d258ad0d6b63ccf16900f19aca"`
[INFO] [stderr]    Compiling lychrel v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> src/main.rs:64:14
[INFO] [stderr]    |
[INFO] [stderr] 64 |     for i in (1..(max_num + 1)) {
[INFO] [stderr]    |              ^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.50s
[INFO] running `"docker" "inspect" "c2bcdb77f801f8ccbf7c8194612a99eb50f9d2d258ad0d6b63ccf16900f19aca"`
[INFO] running `"docker" "rm" "-f" "c2bcdb77f801f8ccbf7c8194612a99eb50f9d2d258ad0d6b63ccf16900f19aca"`
[INFO] [stdout] c2bcdb77f801f8ccbf7c8194612a99eb50f9d2d258ad0d6b63ccf16900f19aca
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/monsieursquirrel/lychrel:/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] e0e67fd4109be3f614a26e43c5b43129af6e2a4ebf63c6d944bfe29b1e6380de
[INFO] running `"docker" "start" "-a" "e0e67fd4109be3f614a26e43c5b43129af6e2a4ebf63c6d944bfe29b1e6380de"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/lychrel-74f22d13291f077a
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test simple_palindromes ... ok
[INFO] [stdout] test simple_rev_adds ... ok
[INFO] [stdout] test expected_non_lychrels ... ok
[INFO] [stdout] test not_palindromes ... ok
[INFO] [stdout] test expected_lychrels ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "e0e67fd4109be3f614a26e43c5b43129af6e2a4ebf63c6d944bfe29b1e6380de"`
[INFO] running `"docker" "rm" "-f" "e0e67fd4109be3f614a26e43c5b43129af6e2a4ebf63c6d944bfe29b1e6380de"`
[INFO] [stdout] e0e67fd4109be3f614a26e43c5b43129af6e2a4ebf63c6d944bfe29b1e6380de