[INFO] updating cached repository monishknair/rocket-quickstart
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/monishknair/rocket-quickstart
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/monishknair/rocket-quickstart" "work/ex/pr-57321/sources/master#c0bbc3927e28c22edefe6a1353b5ecc95ea9a104/gh/monishknair/rocket-quickstart"`
[INFO] [stderr] Cloning into 'work/ex/pr-57321/sources/master#c0bbc3927e28c22edefe6a1353b5ecc95ea9a104/gh/monishknair/rocket-quickstart'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/monishknair/rocket-quickstart" "work/ex/pr-57321/sources/try#b9139d2caca1db46014a9c302d5c47cfae0d8ae0/gh/monishknair/rocket-quickstart"`
[INFO] [stderr] Cloning into 'work/ex/pr-57321/sources/try#b9139d2caca1db46014a9c302d5c47cfae0d8ae0/gh/monishknair/rocket-quickstart'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a8f68bb3f6cd9afe2499edde15e3a97699e18fc5
[INFO] sha for GitHub repo monishknair/rocket-quickstart: a8f68bb3f6cd9afe2499edde15e3a97699e18fc5
[INFO] validating manifest of monishknair/rocket-quickstart on toolchain master#c0bbc3927e28c22edefe6a1353b5ecc95ea9a104
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0bbc3927e28c22edefe6a1353b5ecc95ea9a104-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of monishknair/rocket-quickstart on toolchain try#b9139d2caca1db46014a9c302d5c47cfae0d8ae0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b9139d2caca1db46014a9c302d5c47cfae0d8ae0-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing monishknair/rocket-quickstart
[INFO] finished frobbing monishknair/rocket-quickstart
[INFO] frobbed toml for monishknair/rocket-quickstart written to work/ex/pr-57321/sources/master#c0bbc3927e28c22edefe6a1353b5ecc95ea9a104/gh/monishknair/rocket-quickstart/Cargo.toml
[INFO] started frobbing monishknair/rocket-quickstart
[INFO] finished frobbing monishknair/rocket-quickstart
[INFO] frobbed toml for monishknair/rocket-quickstart written to work/ex/pr-57321/sources/try#b9139d2caca1db46014a9c302d5c47cfae0d8ae0/gh/monishknair/rocket-quickstart/Cargo.toml
[INFO] crate monishknair/rocket-quickstart has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0bbc3927e28c22edefe6a1353b5ecc95ea9a104-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b9139d2caca1db46014a9c302d5c47cfae0d8ae0-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking monishknair/rocket-quickstart against master#c0bbc3927e28c22edefe6a1353b5ecc95ea9a104 for pr-57321
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57321/worker-6/master#c0bbc3927e28c22edefe6a1353b5ecc95ea9a104:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57321/sources/master#c0bbc3927e28c22edefe6a1353b5ecc95ea9a104/gh/monishknair/rocket-quickstart:/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" "+c0bbc3927e28c22edefe6a1353b5ecc95ea9a104-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] e8a5a385794701934f39c7b436a1cb569e494bb2c94dac962b0ffab65ba67696
[INFO] running `"docker" "start" "-a" "e8a5a385794701934f39c7b436a1cb569e494bb2c94dac962b0ffab65ba67696"`
[INFO] [stderr]    Compiling pear_codegen v0.0.20
[INFO] [stderr]    Compiling toml v0.4.6
[INFO] [stderr]    Compiling hyper v0.10.13
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling rayon-core v1.4.1
[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" "e8a5a385794701934f39c7b436a1cb569e494bb2c94dac962b0ffab65ba67696"`
[INFO] running `"docker" "rm" "-f" "e8a5a385794701934f39c7b436a1cb569e494bb2c94dac962b0ffab65ba67696"`
[INFO] [stdout] e8a5a385794701934f39c7b436a1cb569e494bb2c94dac962b0ffab65ba67696