[INFO] crate crucible 0.0.0 is already in cache
[INFO] extracting crate crucible 0.0.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/crucible/0.0.0
[INFO] extracting crate crucible 0.0.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/crucible/0.0.0
[INFO] validating manifest of crucible-0.0.0 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 crucible-0.0.0 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 crucible-0.0.0
[INFO] finished frobbing crucible-0.0.0
[INFO] frobbed toml for crucible-0.0.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/crucible/0.0.0/Cargo.toml
[INFO] started frobbing crucible-0.0.0
[INFO] finished frobbing crucible-0.0.0
[INFO] frobbed toml for crucible-0.0.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/crucible/0.0.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing crucible-0.0.0 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-1/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/crucible/0.0.0:/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] bc0cee60913d0516eb4053f58310112679389ca1a8b8d2cc21380a374409b03f
[INFO] running `"docker" "start" "-a" "bc0cee60913d0516eb4053f58310112679389ca1a8b8d2cc21380a374409b03f"`
[INFO] [stderr]    Compiling hsl v0.1.1
[INFO] [stderr]    Compiling allan v0.2.4
[INFO] [stderr]    Compiling mpmc v0.1.5
[INFO] [stderr]    Compiling stb_truetype v0.1.2
[INFO] [stderr]    Compiling clocksource v0.2.4
[INFO] [stderr]    Compiling heatmap v0.6.6
[INFO] [stderr]    Compiling png v0.7.0
[INFO] [stderr]    Compiling tiny_http v0.5.9
[INFO] [stderr]    Compiling rusttype v0.1.2
[INFO] [stderr]    Compiling waterfall v0.7.1
[INFO] [stderr]    Compiling tic v0.2.4
[INFO] [stderr]    Compiling crucible v0.0.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/metrics.rs:10:19
[INFO] [stderr]    |
[INFO] [stderr] 10 |     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
[INFO] [stderr]    |                   ^ help: consider prefixing with an underscore: `_f`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.31s
[INFO] running `"docker" "inspect" "bc0cee60913d0516eb4053f58310112679389ca1a8b8d2cc21380a374409b03f"`
[INFO] running `"docker" "rm" "-f" "bc0cee60913d0516eb4053f58310112679389ca1a8b8d2cc21380a374409b03f"`
[INFO] [stdout] bc0cee60913d0516eb4053f58310112679389ca1a8b8d2cc21380a374409b03f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/crucible/0.0.0:/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] 638053307ab2c6d29bcc4eb445a9c68c77c2c0698153f7d85af32c85e366d4bc
[INFO] running `"docker" "start" "-a" "638053307ab2c6d29bcc4eb445a9c68c77c2c0698153f7d85af32c85e366d4bc"`
[INFO] [stderr]    Compiling crucible v0.0.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/metrics.rs:10:19
[INFO] [stderr]    |
[INFO] [stderr] 10 |     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
[INFO] [stderr]    |                   ^ help: consider prefixing with an underscore: `_f`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.77s
[INFO] running `"docker" "inspect" "638053307ab2c6d29bcc4eb445a9c68c77c2c0698153f7d85af32c85e366d4bc"`
[INFO] running `"docker" "rm" "-f" "638053307ab2c6d29bcc4eb445a9c68c77c2c0698153f7d85af32c85e366d4bc"`
[INFO] [stdout] 638053307ab2c6d29bcc4eb445a9c68c77c2c0698153f7d85af32c85e366d4bc
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/crucible/0.0.0:/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] ef41ec5b634a8e438f8e9b6be228bd6d0928c177e8768aa4026ad96da58a5b1c
[INFO] running `"docker" "start" "-a" "ef41ec5b634a8e438f8e9b6be228bd6d0928c177e8768aa4026ad96da58a5b1c"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/crucible-7625742ef3b78722
[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" "ef41ec5b634a8e438f8e9b6be228bd6d0928c177e8768aa4026ad96da58a5b1c"`
[INFO] running `"docker" "rm" "-f" "ef41ec5b634a8e438f8e9b6be228bd6d0928c177e8768aa4026ad96da58a5b1c"`
[INFO] [stdout] ef41ec5b634a8e438f8e9b6be228bd6d0928c177e8768aa4026ad96da58a5b1c