Dec 19 09:11:20.651 INFO checking seanhelvey/rustplayground against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 09:11:20.652 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-0/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/seanhelvey/rustplayground:/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 09:11:21.080 INFO [stdout] 4191883a36410218047f70b19a0c24594738dbf45e6e3a2f941b5ce3d92533e7
Dec 19 09:11:21.086 INFO running `"docker" "start" "-a" "4191883a36410218047f70b19a0c24594738dbf45e6e3a2f941b5ce3d92533e7"`
Dec 19 09:11:23.425 INFO [stderr]    Compiling serde v1.0.78
Dec 19 09:11:23.430 INFO [stderr]    Compiling pear_codegen v0.0.20
Dec 19 09:11:23.430 INFO [stderr]    Compiling rayon-core v1.4.1
Dec 19 09:11:28.144 INFO [stderr] error[E0599]: no variant named `concat` found for type `syntax::tokenstream::TokenStream` in the current scope
Dec 19 09:11:28.144 INFO [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/pear_codegen-0.0.20/src/lib.rs:330:54
Dec 19 09:11:28.144 INFO [stderr]     |
Dec 19 09:11:28.144 INFO [stderr] 330 |                 mac.node.tts = ThinTokenStream::from(TokenStream::concat(streams));
Dec 19 09:11:28.144 INFO [stderr]     |                                                      ^^^^^^^^^^^^^^^^^^^ variant not found in `syntax::tokenstream::TokenStream`
Dec 19 09:11:28.168 INFO [stderr] 
Dec 19 09:11:28.416 INFO [stderr] error: aborting due to previous error
Dec 19 09:11:28.444 INFO [stderr] 
Dec 19 09:11:28.445 INFO [stderr] For more information about this error, try `rustc --explain E0599`.
Dec 19 09:11:28.529 INFO [stderr] error: Could not compile `pear_codegen`.
Dec 19 09:11:28.530 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 19 09:11:44.096 INFO [stderr] error: build failed
Dec 19 09:11:44.576 INFO running `"docker" "inspect" "4191883a36410218047f70b19a0c24594738dbf45e6e3a2f941b5ce3d92533e7"`
Dec 19 09:11:44.844 INFO running `"docker" "rm" "-f" "4191883a36410218047f70b19a0c24594738dbf45e6e3a2f941b5ce3d92533e7"`
Dec 19 09:11:45.176 INFO [stdout] 4191883a36410218047f70b19a0c24594738dbf45e6e3a2f941b5ce3d92533e7