[INFO] updating cached repository Disasm/picorv32-example-nmon
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Disasm/picorv32-example-nmon
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Disasm/picorv32-example-nmon" "work/ex/beta-1.38-1/sources/1.37.0/gh/Disasm/picorv32-example-nmon"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Disasm/picorv32-example-nmon'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Disasm/picorv32-example-nmon" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Disasm/picorv32-example-nmon"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Disasm/picorv32-example-nmon'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 18ee971175b39733a8546c7f9f66fa060d6b289f
[INFO] sha for GitHub repo Disasm/picorv32-example-nmon: 18ee971175b39733a8546c7f9f66fa060d6b289f
[INFO] validating manifest of Disasm/picorv32-example-nmon 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 Disasm/picorv32-example-nmon 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 Disasm/picorv32-example-nmon
[INFO] removed path dependency picorv32-rt from Disasm/picorv32-example-nmon
[INFO] finished frobbing Disasm/picorv32-example-nmon
[INFO] frobbed toml for Disasm/picorv32-example-nmon written to work/ex/beta-1.38-1/sources/1.37.0/gh/Disasm/picorv32-example-nmon/Cargo.toml
[INFO] started frobbing Disasm/picorv32-example-nmon
[INFO] removed path dependency picorv32-rt from Disasm/picorv32-example-nmon
[INFO] finished frobbing Disasm/picorv32-example-nmon
[INFO] frobbed toml for Disasm/picorv32-example-nmon written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Disasm/picorv32-example-nmon/Cargo.toml
[INFO] crate Disasm/picorv32-example-nmon already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Disasm/picorv32-example-nmon/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[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 Disasm/picorv32-example-nmon 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-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Disasm/picorv32-example-nmon:/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] fc790c37f5219011b726f5ec8a38e6f8c98a027c0580ed5927e195ea869b733f
[INFO] running `"docker" "start" "-a" "fc790c37f5219011b726f5ec8a38e6f8c98a027c0580ed5927e195ea869b733f"`
[INFO] [stderr] warning: dependency (picorv32-rt) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling regex-syntax v0.6.11
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling riscv v0.5.4
[INFO] [stderr]    Compiling bit_field v0.9.0
[INFO] [stderr] error[E0463]: can't find crate for `core`
[INFO] [stderr]   |
[INFO] [stderr]   = note: the `riscv32imc-unknown-none-elf` target may not be installed
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0463`.
[INFO] [stderr] error: Could not compile `bit_field`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "fc790c37f5219011b726f5ec8a38e6f8c98a027c0580ed5927e195ea869b733f"`
[INFO] running `"docker" "rm" "-f" "fc790c37f5219011b726f5ec8a38e6f8c98a027c0580ed5927e195ea869b733f"`
[INFO] [stdout] fc790c37f5219011b726f5ec8a38e6f8c98a027c0580ed5927e195ea869b733f