[INFO] updating cached repository thomwiggers/powerpolynomials
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/thomwiggers/powerpolynomials
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/thomwiggers/powerpolynomials" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/thomwiggers/powerpolynomials"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/thomwiggers/powerpolynomials'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/thomwiggers/powerpolynomials" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/thomwiggers/powerpolynomials"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/thomwiggers/powerpolynomials'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 66e737be9dea59a8c840af3fab729f5ea20cadf3
[INFO] sha for GitHub repo thomwiggers/powerpolynomials: 66e737be9dea59a8c840af3fab729f5ea20cadf3
[INFO] validating manifest of thomwiggers/powerpolynomials on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of thomwiggers/powerpolynomials on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing thomwiggers/powerpolynomials
[INFO] finished frobbing thomwiggers/powerpolynomials
[INFO] frobbed toml for thomwiggers/powerpolynomials written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/thomwiggers/powerpolynomials/Cargo.toml
[INFO] started frobbing thomwiggers/powerpolynomials
[INFO] finished frobbing thomwiggers/powerpolynomials
[INFO] frobbed toml for thomwiggers/powerpolynomials written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/thomwiggers/powerpolynomials/Cargo.toml
[INFO] crate thomwiggers/powerpolynomials already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] checking thomwiggers/powerpolynomials against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-3/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/thomwiggers/powerpolynomials:/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" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] c07e3c642a4fd5a38003cf4b3f455a8d0adce9cd1c1f6444ddc6df4e6987bc13
[INFO] running `"docker" "start" "-a" "c07e3c642a4fd5a38003cf4b3f455a8d0adce9cd1c1f6444ddc6df4e6987bc13"`
[INFO] [stderr]     Checking serde v1.0.36
[INFO] [stderr] error[E0432]: unresolved import `core::nonzero`
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde-1.0.36/src/lib.rs:215:19
[INFO] [stderr]     |
[INFO] [stderr] 215 |     pub use core::nonzero::{NonZero, Zeroable};
[INFO] [stderr]     |                   ^^^^^^^ could not find `nonzero` in `core`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0432`.
[INFO] [stderr] error: Could not compile `serde`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "c07e3c642a4fd5a38003cf4b3f455a8d0adce9cd1c1f6444ddc6df4e6987bc13"`
[INFO] running `"docker" "rm" "-f" "c07e3c642a4fd5a38003cf4b3f455a8d0adce9cd1c1f6444ddc6df4e6987bc13"`
[INFO] [stdout] c07e3c642a4fd5a38003cf4b3f455a8d0adce9cd1c1f6444ddc6df4e6987bc13