Dec 19 07:44:24.060 INFO checking swamp-dog/swamp-dog-main against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 07:44:24.060 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/swamp-dog/swamp-dog-main:/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 07:44:24.562 INFO [stdout] ca5566e6e41967760bee2acf579d6b74f7dc2a3580f48fc7e3b4ce471bed489d
Dec 19 07:44:24.564 INFO running `"docker" "start" "-a" "ca5566e6e41967760bee2acf579d6b74f7dc2a3580f48fc7e3b4ce471bed489d"`
Dec 19 07:44:27.545 INFO [stderr]    Compiling byteorder v1.2.6
Dec 19 07:44:27.574 INFO [stderr]    Compiling crossbeam-utils v0.2.2
Dec 19 07:44:27.577 INFO [stderr]    Compiling isatty v0.1.9
Dec 19 07:44:27.579 INFO [stderr]    Compiling log v0.3.9
Dec 19 07:44:27.624 INFO [stderr]    Compiling memchr v2.1.0
Dec 19 07:44:27.626 INFO [stderr]    Compiling url v1.7.1
Dec 19 07:44:27.628 INFO [stderr]    Compiling pear_codegen v0.0.20
Dec 19 07:44:28.566 INFO [stderr]     Checking hyper v0.10.13
Dec 19 07:44:28.818 INFO [stderr]    Compiling syn v0.15.11
Dec 19 07:44:31.388 INFO [stderr]     Checking regex v0.2.11
Dec 19 07:44:31.404 INFO [stderr]    Compiling crossbeam-epoch v0.3.1
Dec 19 07:44:32.894 INFO [stderr]    Compiling mime v0.2.6
Dec 19 07:44:36.244 INFO [stderr] error[E0599]: no variant named `concat` found for type `syntax::tokenstream::TokenStream` in the current scope
Dec 19 07:44:36.245 INFO [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/pear_codegen-0.0.20/src/lib.rs:330:54
Dec 19 07:44:36.245 INFO [stderr]     |
Dec 19 07:44:36.245 INFO [stderr] 330 |                 mac.node.tts = ThinTokenStream::from(TokenStream::concat(streams));
Dec 19 07:44:36.245 INFO [stderr]     |                                                      ^^^^^^^^^^^^^^^^^^^ variant not found in `syntax::tokenstream::TokenStream`
Dec 19 07:44:36.272 INFO [stderr] 
Dec 19 07:44:36.289 INFO [stderr]    Compiling base64 v0.6.0
Dec 19 07:44:36.624 INFO [stderr] error: aborting due to previous error
Dec 19 07:44:36.640 INFO [stderr] 
Dec 19 07:44:36.641 INFO [stderr] For more information about this error, try `rustc --explain E0599`.
Dec 19 07:44:36.773 INFO [stderr] error: Could not compile `pear_codegen`.
Dec 19 07:44:36.774 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 19 07:44:53.284 INFO [stderr] error: build failed
Dec 19 07:44:55.130 INFO running `"docker" "inspect" "ca5566e6e41967760bee2acf579d6b74f7dc2a3580f48fc7e3b4ce471bed489d"`
Dec 19 07:44:55.490 INFO running `"docker" "rm" "-f" "ca5566e6e41967760bee2acf579d6b74f7dc2a3580f48fc7e3b4ce471bed489d"`
Dec 19 07:44:55.740 INFO [stdout] ca5566e6e41967760bee2acf579d6b74f7dc2a3580f48fc7e3b4ce471bed489d