[INFO] crate cortex-m-log 0.6.0 is already in cache
[INFO] extracting crate cortex-m-log 0.6.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/cortex-m-log/0.6.0
[INFO] extracting crate cortex-m-log 0.6.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/cortex-m-log/0.6.0
[INFO] validating manifest of cortex-m-log-0.6.0 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 cortex-m-log-0.6.0 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 cortex-m-log-0.6.0
[INFO] finished frobbing cortex-m-log-0.6.0
[INFO] frobbed toml for cortex-m-log-0.6.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/cortex-m-log/0.6.0/Cargo.toml
[INFO] started frobbing cortex-m-log-0.6.0
[INFO] finished frobbing cortex-m-log-0.6.0
[INFO] frobbed toml for cortex-m-log-0.6.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/cortex-m-log/0.6.0/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 cortex-m-log-0.6.0 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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/cortex-m-log/0.6.0:/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] 83ac88e2460d96c8e982a065d51931b911463457cfbf1d572efa9088e5922b04
[INFO] running `"docker" "start" "-a" "83ac88e2460d96c8e982a065d51931b911463457cfbf1d572efa9088e5922b04"`
[INFO] [stderr]    Compiling cortex-m-log v0.6.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.17s
[INFO] running `"docker" "inspect" "83ac88e2460d96c8e982a065d51931b911463457cfbf1d572efa9088e5922b04"`
[INFO] running `"docker" "rm" "-f" "83ac88e2460d96c8e982a065d51931b911463457cfbf1d572efa9088e5922b04"`
[INFO] [stdout] 83ac88e2460d96c8e982a065d51931b911463457cfbf1d572efa9088e5922b04
[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/cortex-m-log/0.6.0:/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] 0a071cf10b6163de55d9f51c6d1238e4a511b2e7707680b26aa2663135a43550
[INFO] running `"docker" "start" "-a" "0a071cf10b6163de55d9f51c6d1238e4a511b2e7707680b26aa2663135a43550"`
[INFO] [stderr]    Compiling cortex-m-log v0.6.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.57s
[INFO] running `"docker" "inspect" "0a071cf10b6163de55d9f51c6d1238e4a511b2e7707680b26aa2663135a43550"`
[INFO] running `"docker" "rm" "-f" "0a071cf10b6163de55d9f51c6d1238e4a511b2e7707680b26aa2663135a43550"`
[INFO] [stdout] 0a071cf10b6163de55d9f51c6d1238e4a511b2e7707680b26aa2663135a43550
[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/cortex-m-log/0.6.0:/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] 9402407307a0aeddc8fca22ce8df771c3d22796e845f82c0f6b881603f8219da
[INFO] running `"docker" "start" "-a" "9402407307a0aeddc8fca22ce8df771c3d22796e845f82c0f6b881603f8219da"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/cortex_m_log-842806a61ab5ba73
[INFO] [stderr]    Doc-tests cortex-m-log
[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] [stdout] test src/lib.rs -  (line 24) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs -  (line 24) stdout ----
[INFO] [stdout] error[E0423]: expected value, found struct `Dummy`
[INFO] [stdout]  --> src/lib.rs:29:19
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let mut log = Dummy;
[INFO] [stdout]   |                   ^^^^^ did you mean `Dummy { /* fields */ }`?
[INFO] [stdout] help: possible better candidates are found in other modules, you can import them into scope
[INFO] [stdout]   |
[INFO] [stdout] 3 | use cortex_m_log::destination::Dummy;
[INFO] [stdout]   |
[INFO] [stdout] 3 | use cortex_m_log::destination::dummy::Dummy;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0423`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs -  (line 24)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `"docker" "inspect" "9402407307a0aeddc8fca22ce8df771c3d22796e845f82c0f6b881603f8219da"`
[INFO] running `"docker" "rm" "-f" "9402407307a0aeddc8fca22ce8df771c3d22796e845f82c0f6b881603f8219da"`
[INFO] [stdout] 9402407307a0aeddc8fca22ce8df771c3d22796e845f82c0f6b881603f8219da