Dec 19 13:26:01.958 INFO checking luciusmagn/symposion against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 13:26:01.958 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-2/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/luciusmagn/symposion:/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 13:26:02.428 INFO [stdout] 3b13a7b25ca64d68c5b97b52cacef86298bacf2e62c1a490e0337b8981c8d9f5
Dec 19 13:26:02.430 INFO running `"docker" "start" "-a" "3b13a7b25ca64d68c5b97b52cacef86298bacf2e62c1a490e0337b8981c8d9f5"`
Dec 19 13:26:04.780 INFO [stderr]    Compiling isatty v0.1.9
Dec 19 13:26:04.820 INFO [stderr]    Compiling base64 v0.9.3
Dec 19 13:26:04.820 INFO [stderr]    Compiling base64 v0.6.0
Dec 19 13:26:04.820 INFO [stderr]    Compiling log v0.3.9
Dec 19 13:26:04.821 INFO [stderr]    Compiling crossbeam-epoch v0.3.1
Dec 19 13:26:04.834 INFO [stderr]    Compiling pear_codegen v0.0.20
Dec 19 13:26:05.776 INFO [stderr]    Compiling toml v0.4.8
Dec 19 13:26:06.096 INFO [stderr]     Checking unicase_serde v0.1.0
Dec 19 13:26:07.337 INFO [stderr]     Checking regex v0.2.11
Dec 19 13:26:08.390 INFO [stderr]     Checking error-chain v0.10.0
Dec 19 13:26:10.645 INFO [stderr]    Compiling mime v0.2.6
Dec 19 13:26:10.646 INFO [stderr]    Compiling crossbeam-deque v0.2.0
Dec 19 13:26:12.140 INFO [stderr]    Compiling rayon-core v1.4.1
Dec 19 13:26:13.528 INFO [stderr] error[E0599]: no variant named `concat` found for type `syntax::tokenstream::TokenStream` in the current scope
Dec 19 13:26:13.528 INFO [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/pear_codegen-0.0.20/src/lib.rs:330:54
Dec 19 13:26:13.528 INFO [stderr]     |
Dec 19 13:26:13.528 INFO [stderr] 330 |                 mac.node.tts = ThinTokenStream::from(TokenStream::concat(streams));
Dec 19 13:26:13.528 INFO [stderr]     |                                                      ^^^^^^^^^^^^^^^^^^^ variant not found in `syntax::tokenstream::TokenStream`
Dec 19 13:26:13.528 INFO [stderr] 
Dec 19 13:26:13.620 INFO [stderr] error: aborting due to previous error
Dec 19 13:26:13.636 INFO [stderr] 
Dec 19 13:26:13.636 INFO [stderr] For more information about this error, try `rustc --explain E0599`.
Dec 19 13:26:13.684 INFO [stderr] error: Could not compile `pear_codegen`.
Dec 19 13:26:13.684 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 19 13:26:20.075 INFO [stderr] error: build failed
Dec 19 13:26:21.138 INFO running `"docker" "inspect" "3b13a7b25ca64d68c5b97b52cacef86298bacf2e62c1a490e0337b8981c8d9f5"`
Dec 19 13:26:21.446 INFO running `"docker" "rm" "-f" "3b13a7b25ca64d68c5b97b52cacef86298bacf2e62c1a490e0337b8981c8d9f5"`
Dec 19 13:26:21.828 INFO [stdout] 3b13a7b25ca64d68c5b97b52cacef86298bacf2e62c1a490e0337b8981c8d9f5