Dec 19 09:11:20.321 INFO checking seanhelvey/rustplayground against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 09:11:20.321 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-1/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 09:11:20.972 INFO [stdout] 953577bddc3f750f4cd2f7118d20a8d634ee8a2cebb255b41da92cabd0c62bb3
Dec 19 09:11:20.974 INFO running `"docker" "start" "-a" "953577bddc3f750f4cd2f7118d20a8d634ee8a2cebb255b41da92cabd0c62bb3"`
Dec 19 09:11:22.928 INFO [stderr]    Compiling serde v1.0.78
Dec 19 09:11:22.928 INFO [stderr]    Compiling byteorder v1.2.6
Dec 19 09:11:22.932 INFO [stderr]    Compiling isatty v0.1.9
Dec 19 09:11:22.932 INFO [stderr]    Compiling memchr v2.0.2
Dec 19 09:11:22.932 INFO [stderr]    Compiling pear_codegen v0.0.20
Dec 19 09:11:22.932 INFO [stderr]    Compiling rocket v0.3.16
Dec 19 09:11:22.932 INFO [stderr]    Compiling rocket_codegen v0.3.16
Dec 19 09:11:23.797 INFO [stderr]    Compiling log v0.3.9
Dec 19 09:11:25.980 INFO [stderr]    Compiling httparse v1.3.2
Dec 19 09:11:26.061 INFO [stderr]    Compiling smallvec v0.6.5
Dec 19 09:11:26.906 INFO [stderr]    Compiling crossbeam-epoch v0.3.1
Dec 19 09:11:27.615 INFO [stderr]    Compiling base64 v0.6.0
Dec 19 09:11:27.762 INFO [stderr]    Compiling base64 v0.9.3
Dec 19 09:11:32.350 INFO [stderr]    Compiling mime v0.2.6
Dec 19 09:11:33.463 INFO [stderr]    Compiling crossbeam-deque v0.2.0
Dec 19 09:11:34.680 INFO [stderr] error[E0599]: no variant named `concat` found for type `syntax::tokenstream::TokenStream` in the current scope
Dec 19 09:11:34.680 INFO [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/pear_codegen-0.0.20/src/lib.rs:330:54
Dec 19 09:11:34.680 INFO [stderr]     |
Dec 19 09:11:34.680 INFO [stderr] 330 |                 mac.node.tts = ThinTokenStream::from(TokenStream::concat(streams));
Dec 19 09:11:34.680 INFO [stderr]     |                                                      ^^^^^^^^^^^^^^^^^^^ variant not found in `syntax::tokenstream::TokenStream`
Dec 19 09:11:34.680 INFO [stderr] 
Dec 19 09:11:34.838 INFO [stderr]    Compiling rayon-core v1.4.1
Dec 19 09:11:34.913 INFO [stderr] error: aborting due to previous error
Dec 19 09:11:34.913 INFO [stderr] 
Dec 19 09:11:34.913 INFO [stderr] For more information about this error, try `rustc --explain E0599`.
Dec 19 09:11:34.949 INFO [stderr] error: Could not compile `pear_codegen`.
Dec 19 09:11:34.949 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 19 09:11:48.312 INFO [stderr] error: build failed
Dec 19 09:11:48.803 INFO running `"docker" "inspect" "953577bddc3f750f4cd2f7118d20a8d634ee8a2cebb255b41da92cabd0c62bb3"`
Dec 19 09:11:49.012 INFO running `"docker" "rm" "-f" "953577bddc3f750f4cd2f7118d20a8d634ee8a2cebb255b41da92cabd0c62bb3"`
Dec 19 09:11:49.284 INFO [stdout] 953577bddc3f750f4cd2f7118d20a8d634ee8a2cebb255b41da92cabd0c62bb3