[INFO] crate exec 0.3.1 is already in cache
[INFO] extracting crate exec 0.3.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/exec/0.3.1
[INFO] extracting crate exec 0.3.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/exec/0.3.1
[INFO] validating manifest of exec-0.3.1 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 exec-0.3.1 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 exec-0.3.1
[INFO] finished frobbing exec-0.3.1
[INFO] frobbed toml for exec-0.3.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/exec/0.3.1/Cargo.toml
[INFO] started frobbing exec-0.3.1
[INFO] finished frobbing exec-0.3.1
[INFO] frobbed toml for exec-0.3.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/exec/0.3.1/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 exec-0.3.1 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-4/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/exec/0.3.1:/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] 9212153eb6e7483c9ade5f83a1338f4b21cf7db9a3bd46bcec88bf60ed08cda7
[INFO] running `"docker" "start" "-a" "9212153eb6e7483c9ade5f83a1338f4b21cf7db9a3bd46bcec88bf60ed08cda7"`
[INFO] [stderr]    Compiling errno v0.2.4
[INFO] [stderr]    Compiling exec v0.3.1 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:44:32
[INFO] [stderr]    |
[INFO] [stderr] 44 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.21s
[INFO] running `"docker" "inspect" "9212153eb6e7483c9ade5f83a1338f4b21cf7db9a3bd46bcec88bf60ed08cda7"`
[INFO] running `"docker" "rm" "-f" "9212153eb6e7483c9ade5f83a1338f4b21cf7db9a3bd46bcec88bf60ed08cda7"`
[INFO] [stdout] 9212153eb6e7483c9ade5f83a1338f4b21cf7db9a3bd46bcec88bf60ed08cda7
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/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/exec/0.3.1:/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] 8841d520f2d01d2e0bdfb10fd8bc18bcdecdd56bfc8ac5fbe6d6922ae78e2674
[INFO] running `"docker" "start" "-a" "8841d520f2d01d2e0bdfb10fd8bc18bcdecdd56bfc8ac5fbe6d6922ae78e2674"`
[INFO] [stderr]    Compiling exec v0.3.1 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:44:32
[INFO] [stderr]    |
[INFO] [stderr] 44 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.97s
[INFO] running `"docker" "inspect" "8841d520f2d01d2e0bdfb10fd8bc18bcdecdd56bfc8ac5fbe6d6922ae78e2674"`
[INFO] running `"docker" "rm" "-f" "8841d520f2d01d2e0bdfb10fd8bc18bcdecdd56bfc8ac5fbe6d6922ae78e2674"`
[INFO] [stdout] 8841d520f2d01d2e0bdfb10fd8bc18bcdecdd56bfc8ac5fbe6d6922ae78e2674
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/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/exec/0.3.1:/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] f87bdef0c774c6164393a7a2a8bf91d85aa73390ae1a6da0b601df1c6f3c48cc
[INFO] running `"docker" "start" "-a" "f87bdef0c774c6164393a7a2a8bf91d85aa73390ae1a6da0b601df1c6f3c48cc"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/exec-67f8a6a856df526b
[INFO] [stderr]    Doc-tests exec
[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 3 tests
[INFO] [stdout] test src/lib.rs - Command::args (line 161) ... ok
[INFO] [stdout] test src/lib.rs - Command (line 129) ... ok
[INFO] [stdout] test src/lib.rs - execvp (line 93) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "f87bdef0c774c6164393a7a2a8bf91d85aa73390ae1a6da0b601df1c6f3c48cc"`
[INFO] running `"docker" "rm" "-f" "f87bdef0c774c6164393a7a2a8bf91d85aa73390ae1a6da0b601df1c6f3c48cc"`
[INFO] [stdout] f87bdef0c774c6164393a7a2a8bf91d85aa73390ae1a6da0b601df1c6f3c48cc