[INFO] crate tailrec 0.0.4 is already in cache
[INFO] extracting crate tailrec 0.0.4 into work/ex/beta-1.38-1/sources/1.37.0/reg/tailrec/0.0.4
[INFO] extracting crate tailrec 0.0.4 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/tailrec/0.0.4
[INFO] validating manifest of tailrec-0.0.4 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 tailrec-0.0.4 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 tailrec-0.0.4
[INFO] finished frobbing tailrec-0.0.4
[INFO] frobbed toml for tailrec-0.0.4 written to work/ex/beta-1.38-1/sources/1.37.0/reg/tailrec/0.0.4/Cargo.toml
[INFO] started frobbing tailrec-0.0.4
[INFO] finished frobbing tailrec-0.0.4
[INFO] frobbed toml for tailrec-0.0.4 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/tailrec/0.0.4/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] 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] testing tailrec-0.0.4 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-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/tailrec/0.0.4:/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] 0bf28b337957bb815a2ffc2d6dbcb5c18f4412e7384bf14ac24e667283edef8f
[INFO] running `"docker" "start" "-a" "0bf28b337957bb815a2ffc2d6dbcb5c18f4412e7384bf14ac24e667283edef8f"`
[INFO] [stderr]    Compiling tailrec v0.0.4 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.21s
[INFO] running `"docker" "inspect" "0bf28b337957bb815a2ffc2d6dbcb5c18f4412e7384bf14ac24e667283edef8f"`
[INFO] running `"docker" "rm" "-f" "0bf28b337957bb815a2ffc2d6dbcb5c18f4412e7384bf14ac24e667283edef8f"`
[INFO] [stdout] 0bf28b337957bb815a2ffc2d6dbcb5c18f4412e7384bf14ac24e667283edef8f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/tailrec/0.0.4:/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] 8c86bf9bda1361da437a0a3a390bbcdc68956df84fb989767abb735e93695bc4
[INFO] running `"docker" "start" "-a" "8c86bf9bda1361da437a0a3a390bbcdc68956df84fb989767abb735e93695bc4"`
[INFO] [stderr]    Compiling tailrec v0.0.4 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.98s
[INFO] running `"docker" "inspect" "8c86bf9bda1361da437a0a3a390bbcdc68956df84fb989767abb735e93695bc4"`
[INFO] running `"docker" "rm" "-f" "8c86bf9bda1361da437a0a3a390bbcdc68956df84fb989767abb735e93695bc4"`
[INFO] [stdout] 8c86bf9bda1361da437a0a3a390bbcdc68956df84fb989767abb735e93695bc4
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/tailrec/0.0.4:/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] 89c322d907f7d25f8bccbc1c47ea9d3fb498613311c1227ac48768c409a68adb
[INFO] running `"docker" "start" "-a" "89c322d907f7d25f8bccbc1c47ea9d3fb498613311c1227ac48768c409a68adb"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/tailrec-77b961a6ca1dc66c
[INFO] [stderr]      Running /opt/crater/target/debug/deps/test-37054ec6f02a37a0
[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] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test test ... ok
[INFO] [stderr]    Doc-tests tailrec
[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" "89c322d907f7d25f8bccbc1c47ea9d3fb498613311c1227ac48768c409a68adb"`
[INFO] running `"docker" "rm" "-f" "89c322d907f7d25f8bccbc1c47ea9d3fb498613311c1227ac48768c409a68adb"`
[INFO] [stdout] 89c322d907f7d25f8bccbc1c47ea9d3fb498613311c1227ac48768c409a68adb