[INFO] updating cached repository yxy/toyos
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/yxy/toyos
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/yxy/toyos" "work/ex/beta-1.38-1/sources/1.37.0/gh/yxy/toyos"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/yxy/toyos'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/yxy/toyos" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/yxy/toyos"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/yxy/toyos'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2ef17498e30d5325948da0e887e43e3e2acd6b5c
[INFO] sha for GitHub repo yxy/toyos: 2ef17498e30d5325948da0e887e43e3e2acd6b5c
[INFO] validating manifest of yxy/toyos 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 yxy/toyos 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 yxy/toyos
[INFO] finished frobbing yxy/toyos
[INFO] frobbed toml for yxy/toyos written to work/ex/beta-1.38-1/sources/1.37.0/gh/yxy/toyos/Cargo.toml
[INFO] started frobbing yxy/toyos
[INFO] finished frobbing yxy/toyos
[INFO] frobbed toml for yxy/toyos written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/yxy/toyos/Cargo.toml
[INFO] crate yxy/toyos 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] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/yxy/toyos/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[INFO] the lockfile is outdated, regenerating it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 yxy/toyos 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-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/yxy/toyos:/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] bc1cb9b8420029f4a74dfc57662e030e72dfb941207e2eb7825d0cf60035c340
[INFO] running `"docker" "start" "-a" "bc1cb9b8420029f4a74dfc57662e030e72dfb941207e2eb7825d0cf60035c340"`
[INFO] [stderr]    Compiling rlibc v0.1.5
[INFO] [stderr]    Compiling my_os v1.0.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0463]: can't find crate for `volatile`
[INFO] [stderr]  --> src/lib.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | extern crate volatile;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[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 `my_os`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "bc1cb9b8420029f4a74dfc57662e030e72dfb941207e2eb7825d0cf60035c340"`
[INFO] running `"docker" "rm" "-f" "bc1cb9b8420029f4a74dfc57662e030e72dfb941207e2eb7825d0cf60035c340"`
[INFO] [stdout] bc1cb9b8420029f4a74dfc57662e030e72dfb941207e2eb7825d0cf60035c340