[INFO] crate err-ctx 0.2.3 is already in cache
[INFO] extracting crate err-ctx 0.2.3 into work/ex/beta-1.38-1/sources/1.37.0/reg/err-ctx/0.2.3
[INFO] extracting crate err-ctx 0.2.3 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/err-ctx/0.2.3
[INFO] validating manifest of err-ctx-0.2.3 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 err-ctx-0.2.3 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 err-ctx-0.2.3
[INFO] finished frobbing err-ctx-0.2.3
[INFO] frobbed toml for err-ctx-0.2.3 written to work/ex/beta-1.38-1/sources/1.37.0/reg/err-ctx/0.2.3/Cargo.toml
[INFO] started frobbing err-ctx-0.2.3
[INFO] finished frobbing err-ctx-0.2.3
[INFO] frobbed toml for err-ctx-0.2.3 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/err-ctx/0.2.3/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 err-ctx-0.2.3 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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/err-ctx/0.2.3:/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] ff46b47f357aa4ee822a5cecb33d5ce7ea74b963d1b339e00da9b170686b14d6
[INFO] running `"docker" "start" "-a" "ff46b47f357aa4ee822a5cecb33d5ce7ea74b963d1b339e00da9b170686b14d6"`
[INFO] [stderr]    Compiling err-ctx v0.2.3 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:76:18
[INFO] [stderr]    |
[INFO] [stderr] 76 | impl<T: Into<Box<Error + Send + Sync>>> ErrorExt for T {
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Error + Send + Sync`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.21s
[INFO] running `"docker" "inspect" "ff46b47f357aa4ee822a5cecb33d5ce7ea74b963d1b339e00da9b170686b14d6"`
[INFO] running `"docker" "rm" "-f" "ff46b47f357aa4ee822a5cecb33d5ce7ea74b963d1b339e00da9b170686b14d6"`
[INFO] [stdout] ff46b47f357aa4ee822a5cecb33d5ce7ea74b963d1b339e00da9b170686b14d6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/err-ctx/0.2.3:/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] 3d2e8230477a343289d79e447083807e3f7de2958435f157babb69f12e19f736
[INFO] running `"docker" "start" "-a" "3d2e8230477a343289d79e447083807e3f7de2958435f157babb69f12e19f736"`
[INFO] [stderr]    Compiling err-ctx v0.2.3 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:76:18
[INFO] [stderr]    |
[INFO] [stderr] 76 | impl<T: Into<Box<Error + Send + Sync>>> ErrorExt for T {
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Error + Send + Sync`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.31s
[INFO] running `"docker" "inspect" "3d2e8230477a343289d79e447083807e3f7de2958435f157babb69f12e19f736"`
[INFO] running `"docker" "rm" "-f" "3d2e8230477a343289d79e447083807e3f7de2958435f157babb69f12e19f736"`
[INFO] [stdout] 3d2e8230477a343289d79e447083807e3f7de2958435f157babb69f12e19f736
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/err-ctx/0.2.3:/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] 91afe1b58ff1c4cd5aadd9f9e49375c22e5c8e84f284574b440fe08b9c9dc873
[INFO] running `"docker" "start" "-a" "91afe1b58ff1c4cd5aadd9f9e49375c22e5c8e84f284574b440fe08b9c9dc873"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/err_ctx-eda3312f903ff687
[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 err-ctx
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs -  (line 7) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "91afe1b58ff1c4cd5aadd9f9e49375c22e5c8e84f284574b440fe08b9c9dc873"`
[INFO] running `"docker" "rm" "-f" "91afe1b58ff1c4cd5aadd9f9e49375c22e5c8e84f284574b440fe08b9c9dc873"`
[INFO] [stdout] 91afe1b58ff1c4cd5aadd9f9e49375c22e5c8e84f284574b440fe08b9c9dc873