[INFO] crate fern 0.5.7 is already in cache
[INFO] extracting crate fern 0.5.7 into work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/reg/fern/0.5.7
[INFO] extracting crate fern 0.5.7 into work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/reg/fern/0.5.7
[INFO] validating manifest of fern-0.5.7 on toolchain master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of fern-0.5.7 on toolchain try#7fea0229842e79db1159ea58ad9a653b288efee9
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing fern-0.5.7
[INFO] removed 6 missing examples
[INFO] finished frobbing fern-0.5.7
[INFO] frobbed toml for fern-0.5.7 written to work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/reg/fern/0.5.7/Cargo.toml
[INFO] started frobbing fern-0.5.7
[INFO] removed 6 missing examples
[INFO] finished frobbing fern-0.5.7
[INFO] frobbed toml for fern-0.5.7 written to work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/reg/fern/0.5.7/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing fern-0.5.7 against master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54 for pr-57967
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-3/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/reg/fern/0.5.7:/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=forbid" "-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" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "build" "--frozen"`
[INFO] [stdout] f03a20e3ce865a19ec5c81068dc46bc8577f9e7b2604aca370b4633ab44b4501
[INFO] running `"docker" "start" "-a" "f03a20e3ce865a19ec5c81068dc46bc8577f9e7b2604aca370b4633ab44b4501"`
[INFO] [stderr] warning: An explicit [[example]] section is specified in Cargo.toml which currently
[INFO] [stderr] disables Cargo from automatically inferring other example targets.
[INFO] [stderr] This inference behavior will change in the Rust 2018 edition and the following
[INFO] [stderr] files will be included as a example target:
[INFO] [stderr] 
[INFO] [stderr] * /opt/crater/workdir/examples/syslog.rs
[INFO] [stderr] * /opt/crater/workdir/examples/syslog3.rs
[INFO] [stderr] * /opt/crater/workdir/examples/cmd-program.rs
[INFO] [stderr] * /opt/crater/workdir/examples/pretty-colored.rs
[INFO] [stderr] * /opt/crater/workdir/examples/colored.rs
[INFO] [stderr] * /opt/crater/workdir/examples/meta-logging.rs
[INFO] [stderr] 
[INFO] [stderr] This is likely to break cargo build or cargo test as these files may not be
[INFO] [stderr] ready to be compiled as a example target today. You can future-proof yourself
[INFO] [stderr] and disable this warning by adding `autoexamples = false` to your [package]
[INFO] [stderr] section. You may also move the files to a location where Cargo would not
[INFO] [stderr] automatically infer them to be a target, such as in subfolders.
[INFO] [stderr] 
[INFO] [stderr] For more information on this warning you can consult
[INFO] [stderr] https://github.com/rust-lang/cargo/issues/5330
[INFO] [stderr]    Compiling fern v0.5.7 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.56s
[INFO] running `"docker" "inspect" "f03a20e3ce865a19ec5c81068dc46bc8577f9e7b2604aca370b4633ab44b4501"`
[INFO] running `"docker" "rm" "-f" "f03a20e3ce865a19ec5c81068dc46bc8577f9e7b2604aca370b4633ab44b4501"`
[INFO] [stdout] f03a20e3ce865a19ec5c81068dc46bc8577f9e7b2604aca370b4633ab44b4501
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-3/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/reg/fern/0.5.7:/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=forbid" "-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" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] 2716d3347992a8a962266cc952f3aed6f6f5ec09c1f8947fcf56c2f4f1b83773
[INFO] running `"docker" "start" "-a" "2716d3347992a8a962266cc952f3aed6f6f5ec09c1f8947fcf56c2f4f1b83773"`
[INFO] [stderr] warning: An explicit [[example]] section is specified in Cargo.toml which currently
[INFO] [stderr] disables Cargo from automatically inferring other example targets.
[INFO] [stderr] This inference behavior will change in the Rust 2018 edition and the following
[INFO] [stderr] files will be included as a example target:
[INFO] [stderr] 
[INFO] [stderr] * /opt/crater/workdir/examples/syslog.rs
[INFO] [stderr] * /opt/crater/workdir/examples/syslog3.rs
[INFO] [stderr] * /opt/crater/workdir/examples/cmd-program.rs
[INFO] [stderr] * /opt/crater/workdir/examples/pretty-colored.rs
[INFO] [stderr] * /opt/crater/workdir/examples/colored.rs
[INFO] [stderr] * /opt/crater/workdir/examples/meta-logging.rs
[INFO] [stderr] 
[INFO] [stderr] This is likely to break cargo build or cargo test as these files may not be
[INFO] [stderr] ready to be compiled as a example target today. You can future-proof yourself
[INFO] [stderr] and disable this warning by adding `autoexamples = false` to your [package]
[INFO] [stderr] section. You may also move the files to a location where Cargo would not
[INFO] [stderr] automatically infer them to be a target, such as in subfolders.
[INFO] [stderr] 
[INFO] [stderr] For more information on this warning you can consult
[INFO] [stderr] https://github.com/rust-lang/cargo/issues/5330
[INFO] [stderr]    Compiling fern v0.5.7 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.05s
[INFO] running `"docker" "inspect" "2716d3347992a8a962266cc952f3aed6f6f5ec09c1f8947fcf56c2f4f1b83773"`
[INFO] running `"docker" "rm" "-f" "2716d3347992a8a962266cc952f3aed6f6f5ec09c1f8947fcf56c2f4f1b83773"`
[INFO] [stdout] 2716d3347992a8a962266cc952f3aed6f6f5ec09c1f8947fcf56c2f4f1b83773
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-3/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/reg/fern/0.5.7:/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=forbid" "-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" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "test" "--frozen"`
[INFO] [stdout] 8d9597c92641b9f7254011668f2501f84db7534a98d9fafa6ac40a89d01ffbbe
[INFO] running `"docker" "start" "-a" "8d9597c92641b9f7254011668f2501f84db7534a98d9fafa6ac40a89d01ffbbe"`
[INFO] [stderr] warning: An explicit [[example]] section is specified in Cargo.toml which currently
[INFO] [stderr] disables Cargo from automatically inferring other example targets.
[INFO] [stderr] This inference behavior will change in the Rust 2018 edition and the following
[INFO] [stderr] files will be included as a example target:
[INFO] [stderr] 
[INFO] [stderr] * /opt/crater/workdir/examples/syslog.rs
[INFO] [stderr] * /opt/crater/workdir/examples/syslog3.rs
[INFO] [stderr] * /opt/crater/workdir/examples/cmd-program.rs
[INFO] [stderr] * /opt/crater/workdir/examples/pretty-colored.rs
[INFO] [stderr] * /opt/crater/workdir/examples/colored.rs
[INFO] [stderr] * /opt/crater/workdir/examples/meta-logging.rs
[INFO] [stderr] 
[INFO] [stderr] This is likely to break cargo build or cargo test as these files may not be
[INFO] [stderr] ready to be compiled as a example target today. You can future-proof yourself
[INFO] [stderr] and disable this warning by adding `autoexamples = false` to your [package]
[INFO] [stderr] section. You may also move the files to a location where Cargo would not
[INFO] [stderr] automatically infer them to be a target, such as in subfolders.
[INFO] [stderr] 
[INFO] [stderr] For more information on this warning you can consult
[INFO] [stderr] https://github.com/rust-lang/cargo/issues/5330
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/fern-b90c6b0237cd3014
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test log_impl::test::test_level_config_find_exact_minimal ... ok
[INFO] [stdout] test log_impl::test::test_level_config_all_chars ... ok
[INFO] [stdout] test log_impl::test::test_level_config_find_exact_many ... ok
[INFO] [stdout] test log_impl::test::test_level_config_hierarchy_correct ... ok
[INFO] [stdout] test log_impl::test::test_level_config_similar_names_are_not_same ... ok
[INFO] [stdout] test log_impl::test::test_level_config_simple_hierarchy ... ok
[INFO] [stdout] test log_impl::test::test_level_config_single_colon_is_not_double_colon ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/channel_logging-553e421dbbca2536
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test test_channel_logging ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stderr]      Running /opt/crater/target/debug/deps/file_logging-b05f0b98df718e38
[INFO] [stderr]      Running /opt/crater/target/debug/deps/global_logging-152693bf4b053f6d
[INFO] [stdout] test test_custom_line_separators ... ok
[INFO] [stderr]      Running /opt/crater/target/debug/deps/meta_logging-f0499d5858c2de93
[INFO] [stdout] [INFO] Test information message
[INFO] [stdout] [WARN] Test warning message
[INFO] [stdout] [ERROR] Test error message
[INFO] [stdout] test test_basic_logging_file_logging ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test test_global_logger ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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] this should not panic
[INFO] [stdout] test double_chained_with_panics_no_info_panic ... ok
[INFO] [stderr]      Running /opt/crater/target/debug/deps/panic_logging-d1ce7ab9c00ded2e
[INFO] [stderr]      Running /opt/crater/target/debug/deps/support-08911c8fbb3eb68b
[INFO] [stdout] test test_panic_panics ... ok
[INFO] [stdout] test double_chained_with_panics_yes_error_panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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 1 test
[INFO] [stderr]      Running /opt/crater/target/debug/deps/write_logging-da2e3c74af3a04a2
[INFO] [stdout] [INFO] Test information message
[INFO] [stdout] test test_raw_write_logging ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests fern
[INFO] [stdout] 
[INFO] [stdout] running 30 tests
[INFO] [stdout] test src/builders.rs - builders::Dispatch::filter (line 328) ... ok
[INFO] [stdout] test src/builders.rs - builders::Dispatch (line 32) ... ok
[INFO] [stdout] test src/builders.rs - builders::Dispatch::level (line 212) ... ok
[INFO] [stdout] test src/builders.rs - builders::Dispatch::into_shared (line 371) ... ok
[INFO] [stdout] test src/builders.rs - builders::Dispatch::format (line 153) ... ok
[INFO] [stdout] test src/builders.rs - builders::Output::file (line 861) ... ok
[INFO] [stdout] test src/builders.rs - builders::Dispatch::into_log (line 559) ... ok
[INFO] [stdout] test src/builders.rs - builders::Dispatch::chain (line 187) ... ok
[INFO] [stdout] test src/builders.rs - builders::Dispatch::level_for (line 247) ... ok
[INFO] [stdout] test src/builders.rs - builders::Dispatch::level_for (line 264) ... ok
[INFO] [stdout] test src/builders.rs - builders::Output::file (line 872) ... ok
[INFO] [stdout] test src/builders.rs - builders::Output::file (line 885) ... ok
[INFO] [stdout] test src/builders.rs - builders::Output::call (line 1059) ... ok
[INFO] [stdout] test src/builders.rs - builders::Output::writer (line 911) ... ok
[INFO] [stdout] test src/builders.rs - builders::Output::stderr (line 989) ... ok
[INFO] [stdout] test src/builders.rs - builders::Output::stderr (line 981) ... ok
[INFO] [stdout] test src/builders.rs - builders::Output::writer (line 928) ... ok
[INFO] [stdout] test src/builders.rs - builders::Output::sender (line 1010) ... ok
[INFO] [stdout] test src/builders.rs - builders::Output::stdout (line 954) ... ok
[INFO] [stdout] test src/builders.rs - builders::Output::stdout (line 962) ... ok
[INFO] [stdout] test src/builders.rs - builders::Panic (line 687) ... ok
[INFO] [stdout] test src/builders.rs - builders::Panic (line 665) ... ok
[INFO] [stdout] test src/lib.rs -  (line 17) ... ok
[INFO] [stdout] test src/lib.rs - log_file (line 273) ... ok
[INFO] [stdout] test src/lib.rs -  (line 153) ... ok
[INFO] [stdout] test src/lib.rs -  (line 32) ... ok
[INFO] [stdout] test src/meta.rs - meta (line 50) ... ok
[INFO] [stdout] test src/log_impl.rs - log_impl::FormatCallback (line 40) ... ok
[INFO] [stdout] test src/meta.rs - meta (line 6) ... ok
[INFO] [stdout] test src/log_impl.rs - log_impl::FormatCallback<'a>::finish (line 319) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 30 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "8d9597c92641b9f7254011668f2501f84db7534a98d9fafa6ac40a89d01ffbbe"`
[INFO] running `"docker" "rm" "-f" "8d9597c92641b9f7254011668f2501f84db7534a98d9fafa6ac40a89d01ffbbe"`
[INFO] [stdout] 8d9597c92641b9f7254011668f2501f84db7534a98d9fafa6ac40a89d01ffbbe