[INFO] crate serpent 0.0.0 is already in cache
[INFO] extracting crate serpent 0.0.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/serpent/0.0.0
[INFO] extracting crate serpent 0.0.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/serpent/0.0.0
[INFO] validating manifest of serpent-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 serpent-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 serpent-0.0.0
[INFO] finished frobbing serpent-0.0.0
[INFO] frobbed toml for serpent-0.0.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/serpent/0.0.0/Cargo.toml
[INFO] started frobbing serpent-0.0.0
[INFO] finished frobbing serpent-0.0.0
[INFO] frobbed toml for serpent-0.0.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/serpent/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] 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 serpent-0.0.0 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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/serpent/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 6a50abe87ca94204df637db331194fd8b3c685873dee2c3a756b103245fa0fc2
[INFO] running `"docker" "start" "-a" "6a50abe87ca94204df637db331194fd8b3c685873dee2c3a756b103245fa0fc2"`
[INFO] [stderr]    Compiling serpent v0.0.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `"docker" "inspect" "6a50abe87ca94204df637db331194fd8b3c685873dee2c3a756b103245fa0fc2"`
[INFO] running `"docker" "rm" "-f" "6a50abe87ca94204df637db331194fd8b3c685873dee2c3a756b103245fa0fc2"`
[INFO] [stdout] 6a50abe87ca94204df637db331194fd8b3c685873dee2c3a756b103245fa0fc2
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/serpent/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 85a3ccbfda04a4c720373c4ab9123f106508309bb928af4c67a18fff5821c4ff
[INFO] running `"docker" "start" "-a" "85a3ccbfda04a4c720373c4ab9123f106508309bb928af4c67a18fff5821c4ff"`
[INFO] [stderr]    Compiling serpent v0.0.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.76s
[INFO] running `"docker" "inspect" "85a3ccbfda04a4c720373c4ab9123f106508309bb928af4c67a18fff5821c4ff"`
[INFO] running `"docker" "rm" "-f" "85a3ccbfda04a4c720373c4ab9123f106508309bb928af4c67a18fff5821c4ff"`
[INFO] [stdout] 85a3ccbfda04a4c720373c4ab9123f106508309bb928af4c67a18fff5821c4ff
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/serpent/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] e23f840ff8d4832768b53970d620fec02f634309f22312230f89712dfa65bdce
[INFO] running `"docker" "start" "-a" "e23f840ff8d4832768b53970d620fec02f634309f22312230f89712dfa65bdce"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/serpent-5f10b4b80abf78d4
[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]    Doc-tests serpent
[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" "e23f840ff8d4832768b53970d620fec02f634309f22312230f89712dfa65bdce"`
[INFO] running `"docker" "rm" "-f" "e23f840ff8d4832768b53970d620fec02f634309f22312230f89712dfa65bdce"`
[INFO] [stdout] e23f840ff8d4832768b53970d620fec02f634309f22312230f89712dfa65bdce