[INFO] updating cached repository kureuil/tracers
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/kureuil/tracers
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/kureuil/tracers" "work/ex/beta-1.38-1/sources/1.37.0/gh/kureuil/tracers"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/kureuil/tracers'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/kureuil/tracers" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/kureuil/tracers"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/kureuil/tracers'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7b41f3b6701cf871c903f16a29528bf57f32bd6d
[INFO] sha for GitHub repo kureuil/tracers: 7b41f3b6701cf871c903f16a29528bf57f32bd6d
[INFO] validating manifest of kureuil/tracers 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 kureuil/tracers 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 kureuil/tracers
[INFO] finished frobbing kureuil/tracers
[INFO] frobbed toml for kureuil/tracers written to work/ex/beta-1.38-1/sources/1.37.0/gh/kureuil/tracers/Cargo.toml
[INFO] started frobbing kureuil/tracers
[INFO] finished frobbing kureuil/tracers
[INFO] frobbed toml for kureuil/tracers written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/kureuil/tracers/Cargo.toml
[INFO] crate kureuil/tracers 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] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/kureuil/tracers/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing kureuil/tracers 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-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/kureuil/tracers:/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] 9c817a0ed9b761236c8267d17371384ffa0364c45a67b5f9d494a2f31311854b
[INFO] running `"docker" "start" "-a" "9c817a0ed9b761236c8267d17371384ffa0364c45a67b5f9d494a2f31311854b"`
[INFO] [stderr]    Compiling nix v0.7.0
[INFO] [stderr]    Compiling tracers v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.89s
[INFO] running `"docker" "inspect" "9c817a0ed9b761236c8267d17371384ffa0364c45a67b5f9d494a2f31311854b"`
[INFO] running `"docker" "rm" "-f" "9c817a0ed9b761236c8267d17371384ffa0364c45a67b5f9d494a2f31311854b"`
[INFO] [stdout] 9c817a0ed9b761236c8267d17371384ffa0364c45a67b5f9d494a2f31311854b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/kureuil/tracers:/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] 0a616417e7ed94d8d03a763fdb9a4655cf7326de3d57c6dfd8894a6cff7e8769
[INFO] running `"docker" "start" "-a" "0a616417e7ed94d8d03a763fdb9a4655cf7326de3d57c6dfd8894a6cff7e8769"`
[INFO] [stderr]    Compiling tracers v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.50s
[INFO] running `"docker" "inspect" "0a616417e7ed94d8d03a763fdb9a4655cf7326de3d57c6dfd8894a6cff7e8769"`
[INFO] running `"docker" "rm" "-f" "0a616417e7ed94d8d03a763fdb9a4655cf7326de3d57c6dfd8894a6cff7e8769"`
[INFO] [stdout] 0a616417e7ed94d8d03a763fdb9a4655cf7326de3d57c6dfd8894a6cff7e8769
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/kureuil/tracers:/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] 06df2829c25aea7de5997b535bb51aeaa7564968153c3137aa312b2c76e05f3e
[INFO] running `"docker" "start" "-a" "06df2829c25aea7de5997b535bb51aeaa7564968153c3137aa312b2c76e05f3e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/tracers-1fcdd1ab3ad7665a
[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" "06df2829c25aea7de5997b535bb51aeaa7564968153c3137aa312b2c76e05f3e"`
[INFO] running `"docker" "rm" "-f" "06df2829c25aea7de5997b535bb51aeaa7564968153c3137aa312b2c76e05f3e"`
[INFO] [stdout] 06df2829c25aea7de5997b535bb51aeaa7564968153c3137aa312b2c76e05f3e