[INFO] crate problem 5.1.0 is already in cache
[INFO] extracting crate problem 5.1.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/problem/5.1.0
[INFO] extracting crate problem 5.1.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/problem/5.1.0
[INFO] validating manifest of problem-5.1.0 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 problem-5.1.0 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 problem-5.1.0
[INFO] finished frobbing problem-5.1.0
[INFO] frobbed toml for problem-5.1.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/problem/5.1.0/Cargo.toml
[INFO] started frobbing problem-5.1.0
[INFO] finished frobbing problem-5.1.0
[INFO] frobbed toml for problem-5.1.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/problem/5.1.0/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 problem-5.1.0 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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/problem/5.1.0:/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] fc70d4af3665bde0c129edea1f212652f181a9b7bd8d7b5940dd5bbe94dacc9b
[INFO] running `"docker" "start" "-a" "fc70d4af3665bde0c129edea1f212652f181a9b7bd8d7b5940dd5bbe94dacc9b"`
[INFO] [stderr]    Compiling pulldown-cmark v0.2.0
[INFO] [stderr]    Compiling bytecount v0.4.0
[INFO] [stderr]    Compiling error-chain v0.12.1
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling cargo_metadata v0.6.4
[INFO] [stderr]    Compiling skeptic v0.13.4
[INFO] [stderr]    Compiling problem v5.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:458:32
[INFO] [stderr]     |
[INFO] [stderr] 458 | fn write_error_message(error: &Error, w: &mut impl Write) -> fmt::Result {
[INFO] [stderr]     |                                ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.59s
[INFO] running `"docker" "inspect" "fc70d4af3665bde0c129edea1f212652f181a9b7bd8d7b5940dd5bbe94dacc9b"`
[INFO] running `"docker" "rm" "-f" "fc70d4af3665bde0c129edea1f212652f181a9b7bd8d7b5940dd5bbe94dacc9b"`
[INFO] [stdout] fc70d4af3665bde0c129edea1f212652f181a9b7bd8d7b5940dd5bbe94dacc9b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/problem/5.1.0:/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] c3b0fd64a4d53d3b86a2b5e5cb3b0fbaed19d7791de0c719c6cbe69f512e9004
[INFO] running `"docker" "start" "-a" "c3b0fd64a4d53d3b86a2b5e5cb3b0fbaed19d7791de0c719c6cbe69f512e9004"`
[INFO] [stderr]    Compiling ansi_term v0.12.0
[INFO] [stderr]    Compiling loggerv v0.7.2
[INFO] [stderr]    Compiling problem v5.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:458:32
[INFO] [stderr]     |
[INFO] [stderr] 458 | fn write_error_message(error: &Error, w: &mut impl Write) -> fmt::Result {
[INFO] [stderr]     |                                ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.38s
[INFO] running `"docker" "inspect" "c3b0fd64a4d53d3b86a2b5e5cb3b0fbaed19d7791de0c719c6cbe69f512e9004"`
[INFO] running `"docker" "rm" "-f" "c3b0fd64a4d53d3b86a2b5e5cb3b0fbaed19d7791de0c719c6cbe69f512e9004"`
[INFO] [stdout] c3b0fd64a4d53d3b86a2b5e5cb3b0fbaed19d7791de0c719c6cbe69f512e9004
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/problem/5.1.0:/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] 861378fbb7e9426dae371b1401b1077620b5b2e9840bc9022bcef7cfbe06e7ad
[INFO] running `"docker" "start" "-a" "861378fbb7e9426dae371b1401b1077620b5b2e9840bc9022bcef7cfbe06e7ad"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/problem-139db188d705ae14
[INFO] [stdout] 
[INFO] [stdout] running 22 tests
[INFO] [stdout] test tests::test_convertion ... ok
[INFO] [stdout] test tests::test_integration_message ... ok
[INFO] [stderr] problem::logged: Continuing with error: Foo error
[INFO] [stdout] test tests::test_option ... ok
[INFO] [stderr] problem::logged: Continuing with error: Foo error
[INFO] [stdout] test tests::test_in_context_of ... ok
[INFO] [stderr] problem::logged: Continuing with error: Foo error
[INFO] [stdout] test tests::test_integration ... ok
[INFO] [stderr] problem::logged: Continuing with error: Baz error; caused by: Bar error; caused by: Foo error
[INFO] [stdout] test tests::test_integration_cause_chain ... ok
[INFO] [stderr] problem::logged: Continuing with error: Foo error
[INFO] [stdout] test tests::test_panic_format_stderr ... ok
[INFO] [stderr] problem::logged: Continuing with error: Foo error
[INFO] [stdout] test tests::test_panic_format_stderr_problem ... ok
[INFO] [stderr] problem::logged: Continuing with error: Foo error
[INFO] [stdout] test tests::test_problem_backtrace ... ok
[INFO] [stdout] test tests::test_panic_format_stderr_expect ... ok
[INFO] [stdout] test tests::test_option_errors ... ok
[INFO] [stdout] test tests::test_result ... ok
[INFO] [stdout] test tests::test_panic_format_stderr_unwrap ... ok
[INFO] [stdout] test tests::test_problem_log_iter_error ... ok
[INFO] [stdout] test tests::test_result_cause_chain ... ok
[INFO] [stdout] test tests::test_problem_log_warn ... ok
[INFO] [stdout] test tests::test_problem_log_iter_warn ... ok
[INFO] [stdout] test tests::test_result_cause_chain_message ... ok
[INFO] [stdout] test tests::test_result_ok_or_problem ... ok
[INFO] [stdout] test tests::test_result_option_errors_unknown ... ok
[INFO] [stdout] test tests::test_result_iter_or_failed_to ... ok
[INFO] [stderr] problem::logged: Continuing with error: Baz error; caused by: Bar error; caused by: Foo error
[INFO] [stdout] test tests::test_problem_log_error ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 22 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/skeptic-c6b96ee6def21236
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stderr] Fatal error: Failed to create a string due to: invalid utf-8 sequence of 1 bytes from index 2
[INFO] [stdout] test readme_sect_example_line_42 ... ok
[INFO] [stdout] test readme_sect_example_line_27 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests problem
[INFO] [stdout] 
[INFO] [stdout] running 18 tests
[INFO] [stdout] test src/lib.rs -  (line 108) ... ok
[INFO] [stdout] test src/lib.rs -  (line 204) ... ok
[INFO] [stdout] test src/lib.rs -  (line 121) ... ok
[INFO] [stdout] test src/lib.rs -  (line 189) ... ok
[INFO] [stdout] test src/lib.rs -  (line 133) ... ok
[INFO] [stdout] test src/lib.rs -  (line 175) ... ok
[INFO] [stdout] test src/lib.rs -  (line 151) ... ok
[INFO] [stdout] test src/lib.rs -  (line 161) ... ok
[INFO] [stdout] test src/lib.rs -  (line 238) ... ok
[INFO] [stdout] test src/lib.rs -  (line 251) ... ok
[INFO] [stdout] test src/lib.rs -  (line 27) ... ok
[INFO] [stdout] test src/lib.rs -  (line 38) ... ok
[INFO] [stdout] test src/lib.rs -  (line 394) ... ok
[INFO] [stdout] test src/lib.rs -  (line 266) ... ok
[INFO] [stdout] test src/lib.rs -  (line 52) ... ok
[INFO] [stdout] test src/lib.rs -  (line 285) ... ok
[INFO] [stdout] test src/lib.rs -  (line 96) ... ok
[INFO] [stdout] test src/lib.rs -  (line 65) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 18 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "861378fbb7e9426dae371b1401b1077620b5b2e9840bc9022bcef7cfbe06e7ad"`
[INFO] running `"docker" "rm" "-f" "861378fbb7e9426dae371b1401b1077620b5b2e9840bc9022bcef7cfbe06e7ad"`
[INFO] [stdout] 861378fbb7e9426dae371b1401b1077620b5b2e9840bc9022bcef7cfbe06e7ad