[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-1.38-1/sources/1.37.0/gh/pombase/pombase_rc_string"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/pombase/pombase_rc_string'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/pombase/pombase_rc_string" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/pombase/pombase_rc_string"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/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 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of pombase/pombase_rc_string 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 pombase/pombase_rc_string
[INFO] finished frobbing pombase/pombase_rc_string
[INFO] frobbed toml for pombase/pombase_rc_string written to work/ex/beta-1.38-1/sources/1.37.0/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-1.38-1/sources/beta-2019-08-13/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" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing pombase/pombase_rc_string 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/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] b0920e923f70c74965496170d9663248acf4cc93cd66ec5e377083ec9d0799dd
[INFO] running `"docker" "start" "-a" "b0920e923f70c74965496170d9663248acf4cc93cd66ec5e377083ec9d0799dd"`
[INFO] [stderr]    Compiling ryu v0.2.5
[INFO] [stderr]    Compiling weak-table v0.2.3
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling serde_json v1.0.26
[INFO] [stderr]    Compiling serde_derive v1.0.75
[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 24.69s
[INFO] running `"docker" "inspect" "b0920e923f70c74965496170d9663248acf4cc93cd66ec5e377083ec9d0799dd"`
[INFO] running `"docker" "rm" "-f" "b0920e923f70c74965496170d9663248acf4cc93cd66ec5e377083ec9d0799dd"`
[INFO] [stdout] b0920e923f70c74965496170d9663248acf4cc93cd66ec5e377083ec9d0799dd
[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/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 6efc4f9a1ce26a94eff26fd457282a007e85c232d3999873ea437164b5414f9c
[INFO] running `"docker" "start" "-a" "6efc4f9a1ce26a94eff26fd457282a007e85c232d3999873ea437164b5414f9c"`
[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 2.36s
[INFO] running `"docker" "inspect" "6efc4f9a1ce26a94eff26fd457282a007e85c232d3999873ea437164b5414f9c"`
[INFO] running `"docker" "rm" "-f" "6efc4f9a1ce26a94eff26fd457282a007e85c232d3999873ea437164b5414f9c"`
[INFO] [stdout] 6efc4f9a1ce26a94eff26fd457282a007e85c232d3999873ea437164b5414f9c
[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/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] ff149b23f4d4912b2c89126fde4f15f5e73303ab74a8f5954fd5c40c6e40ba02
[INFO] running `"docker" "start" "-a" "ff149b23f4d4912b2c89126fde4f15f5e73303ab74a8f5954fd5c40c6e40ba02"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/pombase_rc_string-c5e89ba416ad064d
[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-5adb7a2a0fe53406
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[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] [stderr]    Doc-tests pombase_rc_string
[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" "ff149b23f4d4912b2c89126fde4f15f5e73303ab74a8f5954fd5c40c6e40ba02"`
[INFO] running `"docker" "rm" "-f" "ff149b23f4d4912b2c89126fde4f15f5e73303ab74a8f5954fd5c40c6e40ba02"`
[INFO] [stdout] ff149b23f4d4912b2c89126fde4f15f5e73303ab74a8f5954fd5c40c6e40ba02