[INFO] updating cached repository cwhakes/cwh_helloworld
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/cwhakes/cwh_helloworld
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/cwhakes/cwh_helloworld" "work/ex/pr-57501/sources/master#6ecad338381cc3b8d56e2df22e5971a598eddd6c/gh/cwhakes/cwh_helloworld"`
[INFO] [stderr] Cloning into 'work/ex/pr-57501/sources/master#6ecad338381cc3b8d56e2df22e5971a598eddd6c/gh/cwhakes/cwh_helloworld'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/cwhakes/cwh_helloworld" "work/ex/pr-57501/sources/try#5f789154f114767b2d0cb9c5b6c592cb3a635e6f/gh/cwhakes/cwh_helloworld"`
[INFO] [stderr] Cloning into 'work/ex/pr-57501/sources/try#5f789154f114767b2d0cb9c5b6c592cb3a635e6f/gh/cwhakes/cwh_helloworld'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b6d2a95f2279487c1d7c8dee0f74d563aa78f1c2
[INFO] sha for GitHub repo cwhakes/cwh_helloworld: b6d2a95f2279487c1d7c8dee0f74d563aa78f1c2
[INFO] validating manifest of cwhakes/cwh_helloworld on toolchain master#6ecad338381cc3b8d56e2df22e5971a598eddd6c
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+6ecad338381cc3b8d56e2df22e5971a598eddd6c-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of cwhakes/cwh_helloworld on toolchain try#5f789154f114767b2d0cb9c5b6c592cb3a635e6f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f789154f114767b2d0cb9c5b6c592cb3a635e6f-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing cwhakes/cwh_helloworld
[INFO] finished frobbing cwhakes/cwh_helloworld
[INFO] frobbed toml for cwhakes/cwh_helloworld written to work/ex/pr-57501/sources/master#6ecad338381cc3b8d56e2df22e5971a598eddd6c/gh/cwhakes/cwh_helloworld/Cargo.toml
[INFO] started frobbing cwhakes/cwh_helloworld
[INFO] finished frobbing cwhakes/cwh_helloworld
[INFO] frobbed toml for cwhakes/cwh_helloworld written to work/ex/pr-57501/sources/try#5f789154f114767b2d0cb9c5b6c592cb3a635e6f/gh/cwhakes/cwh_helloworld/Cargo.toml
[INFO] crate cwhakes/cwh_helloworld has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+6ecad338381cc3b8d56e2df22e5971a598eddd6c-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f789154f114767b2d0cb9c5b6c592cb3a635e6f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking cwhakes/cwh_helloworld against master#6ecad338381cc3b8d56e2df22e5971a598eddd6c for pr-57501
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57501/worker-3/master#6ecad338381cc3b8d56e2df22e5971a598eddd6c:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57501/sources/master#6ecad338381cc3b8d56e2df22e5971a598eddd6c/gh/cwhakes/cwh_helloworld:/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" "+6ecad338381cc3b8d56e2df22e5971a598eddd6c-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] e5ca56cad762fb3822c2baeb471aefeb50edf598d32b7b08a2d1bdcba93b2fcb
[INFO] running `"docker" "start" "-a" "e5ca56cad762fb3822c2baeb471aefeb50edf598d32b7b08a2d1bdcba93b2fcb"`
[INFO] [stderr]    Compiling serde v1.0.78
[INFO] [stderr]    Compiling pear_codegen v0.0.20
[INFO] [stderr]     Checking toml v0.4.6
[INFO] [stderr]    Compiling hyper v0.10.13
[INFO] [stderr]    Compiling ring v0.11.0
[INFO] [stderr] error[E0599]: no variant named `concat` found for type `syntax::tokenstream::TokenStream` in the current scope
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/pear_codegen-0.0.20/src/lib.rs:330:67
[INFO] [stderr]     |
[INFO] [stderr] 330 |                 mac.node.tts = ThinTokenStream::from(TokenStream::concat(streams));
[INFO] [stderr]     |                                                      -------------^^^^^^
[INFO] [stderr]     |                                                      |
[INFO] [stderr]     |                                                      variant not found in `syntax::tokenstream::TokenStream`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0599`.
[INFO] [stderr] error: Could not compile `pear_codegen`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "e5ca56cad762fb3822c2baeb471aefeb50edf598d32b7b08a2d1bdcba93b2fcb"`
[INFO] running `"docker" "rm" "-f" "e5ca56cad762fb3822c2baeb471aefeb50edf598d32b7b08a2d1bdcba93b2fcb"`
[INFO] [stdout] e5ca56cad762fb3822c2baeb471aefeb50edf598d32b7b08a2d1bdcba93b2fcb