[INFO] updating cached repository loothood/joke
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/loothood/joke
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/loothood/joke" "work/ex/pr-56896/sources/master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980/gh/loothood/joke"`
[INFO] [stderr] Cloning into 'work/ex/pr-56896/sources/master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980/gh/loothood/joke'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/loothood/joke" "work/ex/pr-56896/sources/try#bad365140e1e8233b42b21af70a407f14ce5fec5/gh/loothood/joke"`
[INFO] [stderr] Cloning into 'work/ex/pr-56896/sources/try#bad365140e1e8233b42b21af70a407f14ce5fec5/gh/loothood/joke'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a4b8dae5e131920077a6f3a43b9d637c38168e8e
[INFO] sha for GitHub repo loothood/joke: a4b8dae5e131920077a6f3a43b9d637c38168e8e
[INFO] validating manifest of loothood/joke on toolchain master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+adbfec229ce07ff4b2a7bf2d6dec2d13cb224980-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of loothood/joke on toolchain try#bad365140e1e8233b42b21af70a407f14ce5fec5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+bad365140e1e8233b42b21af70a407f14ce5fec5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing loothood/joke
[INFO] finished frobbing loothood/joke
[INFO] frobbed toml for loothood/joke written to work/ex/pr-56896/sources/master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980/gh/loothood/joke/Cargo.toml
[INFO] started frobbing loothood/joke
[INFO] finished frobbing loothood/joke
[INFO] frobbed toml for loothood/joke written to work/ex/pr-56896/sources/try#bad365140e1e8233b42b21af70a407f14ce5fec5/gh/loothood/joke/Cargo.toml
[INFO] crate loothood/joke has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+adbfec229ce07ff4b2a7bf2d6dec2d13cb224980-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+bad365140e1e8233b42b21af70a407f14ce5fec5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking loothood/joke against try#bad365140e1e8233b42b21af70a407f14ce5fec5 for pr-56896
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56896/worker-6/try#bad365140e1e8233b42b21af70a407f14ce5fec5:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56896/sources/try#bad365140e1e8233b42b21af70a407f14ce5fec5/gh/loothood/joke:/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" "+bad365140e1e8233b42b21af70a407f14ce5fec5-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 56f3ddd0803670dcc6cf0ff339f8fd9eb49d39c3f3b92d0c4b73b611c281a416
[INFO] running `"docker" "start" "-a" "56f3ddd0803670dcc6cf0ff339f8fd9eb49d39c3f3b92d0c4b73b611c281a416"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.12
[INFO] [stderr]    Compiling matches v0.1.7
[INFO] [stderr]    Compiling byteorder v1.2.4
[INFO] [stderr]    Compiling log v0.4.3
[INFO] [stderr]    Compiling memchr v2.0.1
[INFO] [stderr]    Compiling rocket v0.3.17
[INFO] [stderr]    Compiling rocket_codegen v0.3.17
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling unicode-bidi v0.3.4
[INFO] [stderr]     Checking ryu v0.2.3
[INFO] [stderr]    Compiling smallvec v0.6.4
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking r2d2 v0.8.3
[INFO] [stderr]     Checking regex v0.2.11
[INFO] [stderr]     Checking regex v1.0.3
[INFO] [stderr]    Compiling pear_codegen v0.0.20
[INFO] [stderr]    Compiling base64 v0.6.0
[INFO] [stderr]    Compiling base64 v0.9.2
[INFO] [stderr]     Checking serde_json v1.0.33
[INFO] [stderr]     Checking mime v0.2.6
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[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:330:54
[INFO] [stderr]     |
[INFO] [stderr] 330 |                 mac.node.tts = ThinTokenStream::from(TokenStream::concat(streams));
[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" "56f3ddd0803670dcc6cf0ff339f8fd9eb49d39c3f3b92d0c4b73b611c281a416"`
[INFO] running `"docker" "rm" "-f" "56f3ddd0803670dcc6cf0ff339f8fd9eb49d39c3f3b92d0c4b73b611c281a416"`
[INFO] [stdout] 56f3ddd0803670dcc6cf0ff339f8fd9eb49d39c3f3b92d0c4b73b611c281a416