[INFO] fetching crate arduino_mkrzero 0.3.0...
[INFO] extracting crate arduino_mkrzero 0.3.0 into work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/reg/arduino_mkrzero/0.3.0
[INFO] extracting crate arduino_mkrzero 0.3.0 into work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/reg/arduino_mkrzero/0.3.0
[INFO] validating manifest of arduino_mkrzero-0.3.0 on toolchain master#5f9c0448dde167128d668da4555879f64e56af1d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of arduino_mkrzero-0.3.0 on toolchain try#8ec8125bea94852768b56958f05da47666c21ab0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing arduino_mkrzero-0.3.0
[INFO] finished frobbing arduino_mkrzero-0.3.0
[INFO] frobbed toml for arduino_mkrzero-0.3.0 written to work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/reg/arduino_mkrzero/0.3.0/Cargo.toml
[INFO] started frobbing arduino_mkrzero-0.3.0
[INFO] finished frobbing arduino_mkrzero-0.3.0
[INFO] frobbed toml for arduino_mkrzero-0.3.0 written to work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/reg/arduino_mkrzero/0.3.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking arduino_mkrzero-0.3.0 against try#8ec8125bea94852768b56958f05da47666c21ab0 for pr-62133
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62133/worker-2/try#8ec8125bea94852768b56958f05da47666c21ab0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/reg/arduino_mkrzero/0.3.0:/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=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" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 2bad861edc5f8680ea13038a7d18c7d8ccf1b30421f0cc8b147c75a4f972aacc
[INFO] running `"docker" "start" "-a" "2bad861edc5f8680ea13038a7d18c7d8ccf1b30421f0cc8b147c75a4f972aacc"`
[INFO] [stderr]    Compiling cortex-m-rt v0.6.8
[INFO] [stderr]    Compiling atsamd21g18a v0.4.0
[INFO] [stderr]    Compiling arduino_mkrzero v0.3.0 (/opt/crater/workdir)
[INFO] [stderr]     Checking panic-halt v0.2.0
[INFO] [stderr]    Compiling proc-macro-hack v0.5.7
[INFO] [stderr]    Compiling paste-impl v0.1.5
[INFO] [stderr]     Checking paste v0.1.5
[INFO] [stderr]     Checking atsamd-hal v0.5.0
[INFO] [stderr] error: duplicate lang item in crate `std`: `panic_impl`.
[INFO] [stderr]   |
[INFO] [stderr]   = note: first defined in crate `panic_halt`.
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `arduino_mkrzero`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "2bad861edc5f8680ea13038a7d18c7d8ccf1b30421f0cc8b147c75a4f972aacc"`
[INFO] running `"docker" "rm" "-f" "2bad861edc5f8680ea13038a7d18c7d8ccf1b30421f0cc8b147c75a4f972aacc"`
[INFO] [stdout] 2bad861edc5f8680ea13038a7d18c7d8ccf1b30421f0cc8b147c75a4f972aacc