[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 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-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 74a5a014b58840dabd4094bbc749a06e2acec794b3e0eb70f55c48f4416dfc23
[INFO] running `"docker" "start" "-a" "74a5a014b58840dabd4094bbc749a06e2acec794b3e0eb70f55c48f4416dfc23"`
[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 1.19s
[INFO] running `"docker" "inspect" "74a5a014b58840dabd4094bbc749a06e2acec794b3e0eb70f55c48f4416dfc23"`
[INFO] running `"docker" "rm" "-f" "74a5a014b58840dabd4094bbc749a06e2acec794b3e0eb70f55c48f4416dfc23"`
[INFO] [stdout] 74a5a014b58840dabd4094bbc749a06e2acec794b3e0eb70f55c48f4416dfc23
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 3dafe193d6539c562bc3af473e0545e414e501bab74afb911818b9a104284a28
[INFO] running `"docker" "start" "-a" "3dafe193d6539c562bc3af473e0545e414e501bab74afb911818b9a104284a28"`
[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 0.90s
[INFO] running `"docker" "inspect" "3dafe193d6539c562bc3af473e0545e414e501bab74afb911818b9a104284a28"`
[INFO] running `"docker" "rm" "-f" "3dafe193d6539c562bc3af473e0545e414e501bab74afb911818b9a104284a28"`
[INFO] [stdout] 3dafe193d6539c562bc3af473e0545e414e501bab74afb911818b9a104284a28
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] bc7cc684addae973a1017f35201f513b7728dc3179a04527931e9f5498f4273e
[INFO] running `"docker" "start" "-a" "bc7cc684addae973a1017f35201f513b7728dc3179a04527931e9f5498f4273e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/exec-47b10f8af7c42a7c
[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" "bc7cc684addae973a1017f35201f513b7728dc3179a04527931e9f5498f4273e"`
[INFO] running `"docker" "rm" "-f" "bc7cc684addae973a1017f35201f513b7728dc3179a04527931e9f5498f4273e"`
[INFO] [stdout] bc7cc684addae973a1017f35201f513b7728dc3179a04527931e9f5498f4273e