[INFO] crate crucible 0.0.0 is already in cache
[INFO] extracting crate crucible 0.0.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/crucible/0.0.0
[INFO] extracting crate crucible 0.0.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/crucible/0.0.0
[INFO] validating manifest of crucible-0.0.0 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 crucible-0.0.0 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 crucible-0.0.0
[INFO] finished frobbing crucible-0.0.0
[INFO] frobbed toml for crucible-0.0.0 written to work/ex/beta-1.38-1/sources/1.37.0/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-1.38-1/sources/beta-2019-08-13/reg/crucible/0.0.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "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" "+beta-2019-08-13" "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" "+1.37.0" "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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing crucible-0.0.0 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-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 7c9a6b8b03af54e583cd98f7258b69c349e27a37ed16bdc54cd68e15ae7b281d
[INFO] running `"docker" "start" "-a" "7c9a6b8b03af54e583cd98f7258b69c349e27a37ed16bdc54cd68e15ae7b281d"`
[INFO] [stderr]    Compiling histogram v0.6.9
[INFO] [stderr]    Compiling inflate v0.2.0
[INFO] [stderr]    Compiling hsl v0.1.1
[INFO] [stderr]    Compiling ascii v0.7.1
[INFO] [stderr]    Compiling chunked_transfer v0.3.1
[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 uuid v0.1.18
[INFO] [stderr]    Compiling rusttype v0.1.2
[INFO] [stderr]    Compiling url v0.2.38
[INFO] [stderr]    Compiling tiny_http v0.5.9
[INFO] [stderr]    Compiling png v0.7.0
[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 19.07s
[INFO] running `"docker" "inspect" "7c9a6b8b03af54e583cd98f7258b69c349e27a37ed16bdc54cd68e15ae7b281d"`
[INFO] running `"docker" "rm" "-f" "7c9a6b8b03af54e583cd98f7258b69c349e27a37ed16bdc54cd68e15ae7b281d"`
[INFO] [stdout] 7c9a6b8b03af54e583cd98f7258b69c349e27a37ed16bdc54cd68e15ae7b281d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 84db5b736c553391b9c6c9b561f91814157b5984f018b755d4eb5ac7da6fabdd
[INFO] running `"docker" "start" "-a" "84db5b736c553391b9c6c9b561f91814157b5984f018b755d4eb5ac7da6fabdd"`
[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 0.84s
[INFO] running `"docker" "inspect" "84db5b736c553391b9c6c9b561f91814157b5984f018b755d4eb5ac7da6fabdd"`
[INFO] running `"docker" "rm" "-f" "84db5b736c553391b9c6c9b561f91814157b5984f018b755d4eb5ac7da6fabdd"`
[INFO] [stdout] 84db5b736c553391b9c6c9b561f91814157b5984f018b755d4eb5ac7da6fabdd
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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-2019-08-13" "test" "--frozen"`
[INFO] [stdout] ec507950abab3211fe95744f42a9ee61f6907e2ef81e4cecc05fdc4661784de0
[INFO] running `"docker" "start" "-a" "ec507950abab3211fe95744f42a9ee61f6907e2ef81e4cecc05fdc4661784de0"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/crucible-4660e49274c885d5
[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" "ec507950abab3211fe95744f42a9ee61f6907e2ef81e4cecc05fdc4661784de0"`
[INFO] running `"docker" "rm" "-f" "ec507950abab3211fe95744f42a9ee61f6907e2ef81e4cecc05fdc4661784de0"`
[INFO] [stdout] ec507950abab3211fe95744f42a9ee61f6907e2ef81e4cecc05fdc4661784de0