Dec 19 16:29:31.451 INFO checking gluaxspeed/rsbc against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 16:29:31.451 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-6/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/gluaxspeed/rsbc:/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 16:29:31.951 INFO [stdout] a900c5dd129612fcde05c80817f58a15504c6ca3c4fa8720f504a8b30c8af96e
Dec 19 16:29:31.953 INFO running `"docker" "start" "-a" "a900c5dd129612fcde05c80817f58a15504c6ca3c4fa8720f504a8b30c8af96e"`
Dec 19 16:29:33.334 INFO [stderr]    Compiling pear_codegen v0.0.20
Dec 19 16:29:33.342 INFO [stderr]    Compiling hyper v0.10.13
Dec 19 16:29:33.343 INFO [stderr]    Compiling syn v0.15.12
Dec 19 16:29:33.355 INFO [stderr]    Compiling crossbeam-deque v0.2.0
Dec 19 16:29:34.649 INFO [stderr]    Compiling rayon-core v1.4.1
Dec 19 16:29:38.196 INFO [stderr] error[E0599]: no variant named `concat` found for type `syntax::tokenstream::TokenStream` in the current scope
Dec 19 16:29:38.196 INFO [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/pear_codegen-0.0.20/src/lib.rs:330:54
Dec 19 16:29:38.196 INFO [stderr]     |
Dec 19 16:29:38.196 INFO [stderr] 330 |                 mac.node.tts = ThinTokenStream::from(TokenStream::concat(streams));
Dec 19 16:29:38.196 INFO [stderr]     |                                                      ^^^^^^^^^^^^^^^^^^^ variant not found in `syntax::tokenstream::TokenStream`
Dec 19 16:29:38.196 INFO [stderr] 
Dec 19 16:29:38.396 INFO [stderr] error: aborting due to previous error
Dec 19 16:29:38.396 INFO [stderr] 
Dec 19 16:29:38.396 INFO [stderr] For more information about this error, try `rustc --explain E0599`.
Dec 19 16:29:38.460 INFO [stderr] error: Could not compile `pear_codegen`.
Dec 19 16:29:38.460 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 19 16:29:48.812 INFO [stderr] error: build failed
Dec 19 16:29:49.468 INFO running `"docker" "inspect" "a900c5dd129612fcde05c80817f58a15504c6ca3c4fa8720f504a8b30c8af96e"`
Dec 19 16:29:49.671 INFO running `"docker" "rm" "-f" "a900c5dd129612fcde05c80817f58a15504c6ca3c4fa8720f504a8b30c8af96e"`
Dec 19 16:29:49.924 INFO [stdout] a900c5dd129612fcde05c80817f58a15504c6ca3c4fa8720f504a8b30c8af96e