Dec 19 13:13:59.037 INFO checking makslevental/athens_backend against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 13:13:59.037 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-4/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/makslevental/athens_backend:/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 13:13:59.616 INFO [stdout] 009c03871909102a03cbb8da95be9a474a04917e4cd7244a6b6a5e1bf138d029
Dec 19 13:13:59.620 INFO running `"docker" "start" "-a" "009c03871909102a03cbb8da95be9a474a04917e4cd7244a6b6a5e1bf138d029"`
Dec 19 13:14:02.032 INFO [stderr]     Checking lazycell v1.1.0
Dec 19 13:14:02.048 INFO [stderr]    Compiling serde v1.0.78
Dec 19 13:14:02.052 INFO [stderr]     Checking rust-ini v0.12.2
Dec 19 13:14:02.057 INFO [stderr]     Checking Inflector v0.11.3
Dec 19 13:14:02.071 INFO [stderr]     Checking socket2 v0.3.8
Dec 19 13:14:02.072 INFO [stderr]     Checking relay v0.1.1
Dec 19 13:14:02.072 INFO [stderr]     Checking tokio-service v0.1.0
Dec 19 13:14:02.119 INFO [stderr]    Compiling curl-sys v0.4.12
Dec 19 13:14:03.063 INFO [stderr]    Compiling libsqlite3-sys v0.9.3
Dec 19 13:14:04.550 INFO [stderr]    Compiling memchr v2.0.2
Dec 19 13:14:04.553 INFO [stderr]    Compiling base64 v0.9.2
Dec 19 13:14:04.559 INFO [stderr]     Checking yaml-rust v0.4.2
Dec 19 13:14:06.023 INFO [stderr]     Checking nom v4.0.0
Dec 19 13:14:06.028 INFO [stderr]     Checking csv-core v0.1.4
Dec 19 13:14:06.060 INFO [stderr]     Checking want v0.0.4
Dec 19 13:14:07.038 INFO [stderr]     Checking mio v0.6.16
Dec 19 13:14:07.440 INFO [stderr]    Compiling pear_codegen v0.0.20
Dec 19 13:14:07.515 INFO [stderr]     Checking openssl v0.9.24
Dec 19 13:14:07.527 INFO [stderr]     Checking libflate v0.1.16
Dec 19 13:14:08.758 INFO [stderr]    Compiling syn v0.15.3
Dec 19 13:14:11.857 INFO [stderr] error[E0599]: no variant named `concat` found for type `syntax::tokenstream::TokenStream` in the current scope
Dec 19 13:14:11.857 INFO [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/pear_codegen-0.0.20/src/lib.rs:330:54
Dec 19 13:14:11.857 INFO [stderr]     |
Dec 19 13:14:11.857 INFO [stderr] 330 |                 mac.node.tts = ThinTokenStream::from(TokenStream::concat(streams));
Dec 19 13:14:11.857 INFO [stderr]     |                                                      ^^^^^^^^^^^^^^^^^^^ variant not found in `syntax::tokenstream::TokenStream`
Dec 19 13:14:11.857 INFO [stderr] 
Dec 19 13:14:11.872 INFO [stderr]    Compiling rayon v0.7.1
Dec 19 13:14:11.996 INFO [stderr] error: aborting due to previous error
Dec 19 13:14:12.000 INFO [stderr] 
Dec 19 13:14:12.000 INFO [stderr] For more information about this error, try `rustc --explain E0599`.
Dec 19 13:14:12.080 INFO [stderr] error: Could not compile `pear_codegen`.
Dec 19 13:14:12.080 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 19 13:14:26.520 INFO [stderr] error: build failed
Dec 19 13:14:26.939 INFO running `"docker" "inspect" "009c03871909102a03cbb8da95be9a474a04917e4cd7244a6b6a5e1bf138d029"`
Dec 19 13:14:27.124 INFO running `"docker" "rm" "-f" "009c03871909102a03cbb8da95be9a474a04917e4cd7244a6b6a5e1bf138d029"`
Dec 19 13:14:27.364 INFO [stdout] 009c03871909102a03cbb8da95be9a474a04917e4cd7244a6b6a5e1bf138d029