[INFO] crate panic_rtt 0.2.0 is already in cache
[INFO] extracting crate panic_rtt 0.2.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/panic_rtt/0.2.0
[INFO] extracting crate panic_rtt 0.2.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/panic_rtt/0.2.0
[INFO] validating manifest of panic_rtt-0.2.0 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of panic_rtt-0.2.0 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing panic_rtt-0.2.0
[INFO] finished frobbing panic_rtt-0.2.0
[INFO] frobbed toml for panic_rtt-0.2.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/panic_rtt/0.2.0/Cargo.toml
[INFO] started frobbing panic_rtt-0.2.0
[INFO] finished frobbing panic_rtt-0.2.0
[INFO] frobbed toml for panic_rtt-0.2.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/panic_rtt/0.2.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing panic_rtt-0.2.0 against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/panic_rtt/0.2.0:/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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] cb768aec0c237e590fb758ff5cb65d6982296676c6f22b0fe4cae15211f39853
[INFO] running `"docker" "start" "-a" "cb768aec0c237e590fb758ff5cb65d6982296676c6f22b0fe4cae15211f39853"`
[INFO] [stderr]    Compiling stable_deref_trait v1.1.1
[INFO] [stderr]    Compiling cortex-m v0.6.0
[INFO] [stderr]    Compiling vcell v0.1.0
[INFO] [stderr]    Compiling cortex-m v0.5.10
[INFO] [stderr]    Compiling aligned v0.2.0
[INFO] [stderr]    Compiling jlink_rtt v0.1.0
[INFO] [stderr]    Compiling bare-metal v0.2.4
[INFO] [stderr]    Compiling as-slice v0.1.0
[INFO] [stderr]    Compiling volatile-register v0.2.0
[INFO] [stderr]    Compiling aligned v0.3.1
[INFO] [stderr]    Compiling panic_rtt v0.2.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.57s
[INFO] running `"docker" "inspect" "cb768aec0c237e590fb758ff5cb65d6982296676c6f22b0fe4cae15211f39853"`
[INFO] running `"docker" "rm" "-f" "cb768aec0c237e590fb758ff5cb65d6982296676c6f22b0fe4cae15211f39853"`
[INFO] [stdout] cb768aec0c237e590fb758ff5cb65d6982296676c6f22b0fe4cae15211f39853
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/panic_rtt/0.2.0:/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" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 066412e74d6d627178fa3bead609c2af7169413b93c3b380adc99e83e81d90b5
[INFO] running `"docker" "start" "-a" "066412e74d6d627178fa3bead609c2af7169413b93c3b380adc99e83e81d90b5"`
[INFO] [stderr]    Compiling panic_rtt v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0152]: duplicate lang item found: `panic_impl`.
[INFO] [stderr]   --> src/lib.rs:32:1
[INFO] [stderr]    |
[INFO] [stderr] 32 | / fn panic(info: &PanicInfo) -> ! {
[INFO] [stderr] 33 | |     interrupt::disable();
[INFO] [stderr] 34 | |
[INFO] [stderr] 35 | |     let mut out = jlink_rtt::Output::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 40 | |     }
[INFO] [stderr] 41 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: first defined in crate `std`.
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0152`.
[INFO] [stderr] error: Could not compile `panic_rtt`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "066412e74d6d627178fa3bead609c2af7169413b93c3b380adc99e83e81d90b5"`
[INFO] running `"docker" "rm" "-f" "066412e74d6d627178fa3bead609c2af7169413b93c3b380adc99e83e81d90b5"`
[INFO] [stdout] 066412e74d6d627178fa3bead609c2af7169413b93c3b380adc99e83e81d90b5