[INFO] updating cached repository pombase/pombase_rc_string
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/pombase/pombase_rc_string
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/pombase/pombase_rc_string" "work/ex/beta-1.37-6/sources/1.36.0/gh/pombase/pombase_rc_string"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/pombase/pombase_rc_string'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/pombase/pombase_rc_string" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/pombase/pombase_rc_string"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/pombase/pombase_rc_string'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ef7cc29de592e9833c4a094b58180622f95b74c9
[INFO] sha for GitHub repo pombase/pombase_rc_string: ef7cc29de592e9833c4a094b58180622f95b74c9
[INFO] validating manifest of pombase/pombase_rc_string on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of pombase/pombase_rc_string on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing pombase/pombase_rc_string
[INFO] finished frobbing pombase/pombase_rc_string
[INFO] frobbed toml for pombase/pombase_rc_string written to work/ex/beta-1.37-6/sources/1.36.0/gh/pombase/pombase_rc_string/Cargo.toml
[INFO] started frobbing pombase/pombase_rc_string
[INFO] finished frobbing pombase/pombase_rc_string
[INFO] frobbed toml for pombase/pombase_rc_string written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/pombase/pombase_rc_string/Cargo.toml
[INFO] crate pombase/pombase_rc_string already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing pombase/pombase_rc_string against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/pombase/pombase_rc_string:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 5920a14d9333b304265015c31525ce3bfc16a3631590cb381c36e05818212c3e
[INFO] running `"docker" "start" "-a" "5920a14d9333b304265015c31525ce3bfc16a3631590cb381c36e05818212c3e"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.13
[INFO] [stderr]    Compiling serde v1.0.75
[INFO] [stderr]    Compiling ryu v0.2.5
[INFO] [stderr]    Compiling weak-table v0.2.3
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling serde_derive v1.0.75
[INFO] [stderr]    Compiling serde_json v1.0.26
[INFO] [stderr]    Compiling pombase_rc_string v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: static variable `cache` should have an upper case name
[INFO] [stderr]   --> src/lib.rs:24:16
[INFO] [stderr]    |
[INFO] [stderr] 24 |     static ref cache: Mutex<WeakHashSet<Weak<String>>> = Mutex::new(WeakHashSet::new());
[INFO] [stderr]    |                ^^^^^ help: convert the identifier to upper case: `CACHE`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_upper_case_globals)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 30.88s
[INFO] running `"docker" "inspect" "5920a14d9333b304265015c31525ce3bfc16a3631590cb381c36e05818212c3e"`
[INFO] running `"docker" "rm" "-f" "5920a14d9333b304265015c31525ce3bfc16a3631590cb381c36e05818212c3e"`
[INFO] [stdout] 5920a14d9333b304265015c31525ce3bfc16a3631590cb381c36e05818212c3e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/pombase/pombase_rc_string:/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 0e3931001e39e7a7c038387d00840a2d60974795780400f59e0f76c6e55df787
[INFO] running `"docker" "start" "-a" "0e3931001e39e7a7c038387d00840a2d60974795780400f59e0f76c6e55df787"`
[INFO] [stderr]    Compiling pombase_rc_string v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: static variable `cache` should have an upper case name
[INFO] [stderr]   --> src/lib.rs:24:16
[INFO] [stderr]    |
[INFO] [stderr] 24 |     static ref cache: Mutex<WeakHashSet<Weak<String>>> = Mutex::new(WeakHashSet::new());
[INFO] [stderr]    |                ^^^^^ help: convert the identifier to upper case: `CACHE`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_upper_case_globals)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.65s
[INFO] running `"docker" "inspect" "0e3931001e39e7a7c038387d00840a2d60974795780400f59e0f76c6e55df787"`
[INFO] running `"docker" "rm" "-f" "0e3931001e39e7a7c038387d00840a2d60974795780400f59e0f76c6e55df787"`
[INFO] [stdout] 0e3931001e39e7a7c038387d00840a2d60974795780400f59e0f76c6e55df787
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/pombase/pombase_rc_string:/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-2019-07-23" "test" "--frozen"`
[INFO] [stdout] d94d0038870ce0dcff68cc2c89d69ec9703607f8583a586655977fce0d072698
[INFO] running `"docker" "start" "-a" "d94d0038870ce0dcff68cc2c89d69ec9703607f8583a586655977fce0d072698"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/pombase_rc_string-2a049d37000733ab
[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/test-6933a6c2e85cbd7a
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stderr]    Doc-tests pombase_rc_string
[INFO] [stdout] test test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 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" "d94d0038870ce0dcff68cc2c89d69ec9703607f8583a586655977fce0d072698"`
[INFO] running `"docker" "rm" "-f" "d94d0038870ce0dcff68cc2c89d69ec9703607f8583a586655977fce0d072698"`
[INFO] [stdout] d94d0038870ce0dcff68cc2c89d69ec9703607f8583a586655977fce0d072698