[INFO] crate panic-semihosting 0.5.2 is already in cache
[INFO] extracting crate panic-semihosting 0.5.2 into work/ex/beta-1.38-1/sources/1.37.0/reg/panic-semihosting/0.5.2
[INFO] extracting crate panic-semihosting 0.5.2 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/panic-semihosting/0.5.2
[INFO] validating manifest of panic-semihosting-0.5.2 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 panic-semihosting-0.5.2 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 panic-semihosting-0.5.2
[INFO] finished frobbing panic-semihosting-0.5.2
[INFO] frobbed toml for panic-semihosting-0.5.2 written to work/ex/beta-1.38-1/sources/1.37.0/reg/panic-semihosting/0.5.2/Cargo.toml
[INFO] started frobbing panic-semihosting-0.5.2
[INFO] finished frobbing panic-semihosting-0.5.2
[INFO] frobbed toml for panic-semihosting-0.5.2 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/panic-semihosting/0.5.2/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 panic-semihosting-0.5.2 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/panic-semihosting/0.5.2:/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-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 8b2d3447f16f254f0a6a60e1e599e3fd82405b0ecce19d38ce782faaa4e9c09c
[INFO] running `"docker" "start" "-a" "8b2d3447f16f254f0a6a60e1e599e3fd82405b0ecce19d38ce782faaa4e9c09c"`
[INFO] [stderr]    Compiling stable_deref_trait v1.1.1
[INFO] [stderr]    Compiling vcell v0.1.0
[INFO] [stderr]    Compiling cortex-m v0.6.1
[INFO] [stderr]    Compiling cortex-m-semihosting v0.3.4
[INFO] [stderr]    Compiling bare-metal v0.2.4
[INFO] [stderr]    Compiling volatile-register v0.2.0
[INFO] [stderr]    Compiling as-slice v0.1.0
[INFO] [stderr]    Compiling aligned v0.3.1
[INFO] [stderr]    Compiling panic-semihosting v0.5.2 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.70s
[INFO] running `"docker" "inspect" "8b2d3447f16f254f0a6a60e1e599e3fd82405b0ecce19d38ce782faaa4e9c09c"`
[INFO] running `"docker" "rm" "-f" "8b2d3447f16f254f0a6a60e1e599e3fd82405b0ecce19d38ce782faaa4e9c09c"`
[INFO] [stdout] 8b2d3447f16f254f0a6a60e1e599e3fd82405b0ecce19d38ce782faaa4e9c09c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/panic-semihosting/0.5.2:/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-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 4f25f7767452d735759b445c820b142fddeaac1f8e97e5a306f96ba403e3d68e
[INFO] running `"docker" "start" "-a" "4f25f7767452d735759b445c820b142fddeaac1f8e97e5a306f96ba403e3d68e"`
[INFO] [stderr]    Compiling panic-semihosting v0.5.2 (/opt/crater/workdir)
[INFO] [stderr] error[E0152]: duplicate lang item found: `panic_impl`.
[INFO] [stderr]   --> src/lib.rs:77:1
[INFO] [stderr]    |
[INFO] [stderr] 77 | / fn panic(info: &PanicInfo) -> ! {
[INFO] [stderr] 78 | |     interrupt::disable();
[INFO] [stderr] 79 | |
[INFO] [stderr] 80 | |     if let Ok(mut hstdout) = hio::hstdout() {
[INFO] [stderr] ...  |
[INFO] [stderr] 94 | |     loop {}
[INFO] [stderr] 95 | | }
[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-semihosting`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "4f25f7767452d735759b445c820b142fddeaac1f8e97e5a306f96ba403e3d68e"`
[INFO] running `"docker" "rm" "-f" "4f25f7767452d735759b445c820b142fddeaac1f8e97e5a306f96ba403e3d68e"`
[INFO] [stdout] 4f25f7767452d735759b445c820b142fddeaac1f8e97e5a306f96ba403e3d68e