[INFO] updating cached repository leggettc18/blog_os_code
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/leggettc18/blog_os_code
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/leggettc18/blog_os_code" "work/ex/beta-1.38-1/sources/1.37.0/gh/leggettc18/blog_os_code"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/leggettc18/blog_os_code'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/leggettc18/blog_os_code" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/leggettc18/blog_os_code"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/leggettc18/blog_os_code'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b4b65d772d0e3377dc74316139ab7fb8282413d1
[INFO] sha for GitHub repo leggettc18/blog_os_code: b4b65d772d0e3377dc74316139ab7fb8282413d1
[INFO] validating manifest of leggettc18/blog_os_code 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 leggettc18/blog_os_code 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 leggettc18/blog_os_code
[INFO] removed 2 missing tests
[INFO] finished frobbing leggettc18/blog_os_code
[INFO] frobbed toml for leggettc18/blog_os_code written to work/ex/beta-1.38-1/sources/1.37.0/gh/leggettc18/blog_os_code/Cargo.toml
[INFO] started frobbing leggettc18/blog_os_code
[INFO] removed 2 missing tests
[INFO] finished frobbing leggettc18/blog_os_code
[INFO] frobbed toml for leggettc18/blog_os_code written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/leggettc18/blog_os_code/Cargo.toml
[INFO] crate leggettc18/blog_os_code 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing leggettc18/blog_os_code 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/leggettc18/blog_os_code:/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] 8989593daa8d62668ee30ed93de2258c2cfed79899196cb8c24a2ff43955de10
[INFO] running `"docker" "start" "-a" "8989593daa8d62668ee30ed93de2258c2cfed79899196cb8c24a2ff43955de10"`
[INFO] [stderr]    Compiling libc v0.2.58
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling unicode-width v0.1.5
[INFO] [stderr]    Compiling remove_dir_all v0.5.2
[INFO] [stderr]    Compiling cc v1.0.37
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]    Compiling nodrop v0.1.13
[INFO] [stderr]    Compiling llvm-tools v0.1.1
[INFO] [stderr] error[E0463]: can't find crate for `core`
[INFO] [stderr]   |
[INFO] [stderr]   = note: the `x86_64-blog_os-12802559890371040053` 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 `nodrop`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "8989593daa8d62668ee30ed93de2258c2cfed79899196cb8c24a2ff43955de10"`
[INFO] running `"docker" "rm" "-f" "8989593daa8d62668ee30ed93de2258c2cfed79899196cb8c24a2ff43955de10"`
[INFO] [stdout] 8989593daa8d62668ee30ed93de2258c2cfed79899196cb8c24a2ff43955de10