[INFO] updating cached repository makslevental/athens_backend
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/makslevental/athens_backend
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/makslevental/athens_backend" "work/ex/pr-56896/sources/master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980/gh/makslevental/athens_backend"`
[INFO] [stderr] Cloning into 'work/ex/pr-56896/sources/master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980/gh/makslevental/athens_backend'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/makslevental/athens_backend" "work/ex/pr-56896/sources/try#bad365140e1e8233b42b21af70a407f14ce5fec5/gh/makslevental/athens_backend"`
[INFO] [stderr] Cloning into 'work/ex/pr-56896/sources/try#bad365140e1e8233b42b21af70a407f14ce5fec5/gh/makslevental/athens_backend'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] bfc633c6de9ec6032b343732c4ad4f6a6f1e39ad
[INFO] sha for GitHub repo makslevental/athens_backend: bfc633c6de9ec6032b343732c4ad4f6a6f1e39ad
[INFO] validating manifest of makslevental/athens_backend 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 makslevental/athens_backend 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 makslevental/athens_backend
[INFO] finished frobbing makslevental/athens_backend
[INFO] frobbed toml for makslevental/athens_backend written to work/ex/pr-56896/sources/master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980/gh/makslevental/athens_backend/Cargo.toml
[INFO] started frobbing makslevental/athens_backend
[INFO] finished frobbing makslevental/athens_backend
[INFO] frobbed toml for makslevental/athens_backend written to work/ex/pr-56896/sources/try#bad365140e1e8233b42b21af70a407f14ce5fec5/gh/makslevental/athens_backend/Cargo.toml
[INFO] crate makslevental/athens_backend 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 makslevental/athens_backend against master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980 for pr-56896
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56896/worker-1/master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56896/sources/master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980/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" "+adbfec229ce07ff4b2a7bf2d6dec2d13cb224980-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 3a551e01434e805702d4d804c4b2066de42f84a05a67f32c039a6393438febf3
[INFO] running `"docker" "start" "-a" "3a551e01434e805702d4d804c4b2066de42f84a05a67f32c039a6393438febf3"`
[INFO] [stderr]     Checking data-encoding v2.1.1
[INFO] [stderr]     Checking Inflector v0.11.3
[INFO] [stderr]     Checking unidecode v0.3.0
[INFO] [stderr]     Checking tokio-service v0.1.0
[INFO] [stderr]     Checking relay v0.1.1
[INFO] [stderr]    Compiling libz-sys v1.0.22
[INFO] [stderr]    Compiling curl-sys v0.4.12
[INFO] [stderr]    Compiling libsqlite3-sys v0.9.3
[INFO] [stderr]     Checking yaml-rust v0.4.2
[INFO] [stderr]     Checking csv-core v0.1.4
[INFO] [stderr]     Checking nom v4.0.0
[INFO] [stderr]     Checking want v0.0.4
[INFO] [stderr]     Checking mio v0.6.16
[INFO] [stderr]    Compiling openssl v0.9.24
[INFO] [stderr]     Checking toml v0.4.6
[INFO] [stderr]     Checking serde_json v1.0.27
[INFO] [stderr]    Compiling pear_codegen v0.0.20
[INFO] [stderr]     Checking tendril v0.3.1
[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:330:54
[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" "3a551e01434e805702d4d804c4b2066de42f84a05a67f32c039a6393438febf3"`
[INFO] running `"docker" "rm" "-f" "3a551e01434e805702d4d804c4b2066de42f84a05a67f32c039a6393438febf3"`
[INFO] [stdout] 3a551e01434e805702d4d804c4b2066de42f84a05a67f32c039a6393438febf3