[INFO] updating cached repository steadylearner/Rust_Blog
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/steadylearner/Rust_Blog
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/steadylearner/Rust_Blog" "work/ex/pr-56896/sources/master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980/gh/steadylearner/Rust_Blog"`
[INFO] [stderr] Cloning into 'work/ex/pr-56896/sources/master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980/gh/steadylearner/Rust_Blog'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/steadylearner/Rust_Blog" "work/ex/pr-56896/sources/try#bad365140e1e8233b42b21af70a407f14ce5fec5/gh/steadylearner/Rust_Blog"`
[INFO] [stderr] Cloning into 'work/ex/pr-56896/sources/try#bad365140e1e8233b42b21af70a407f14ce5fec5/gh/steadylearner/Rust_Blog'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2fe2d3d559bd09e8af2146a81a811b5ee362815d
[INFO] sha for GitHub repo steadylearner/Rust_Blog: 2fe2d3d559bd09e8af2146a81a811b5ee362815d
[INFO] validating manifest of steadylearner/Rust_Blog 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 steadylearner/Rust_Blog 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 steadylearner/Rust_Blog
[INFO] finished frobbing steadylearner/Rust_Blog
[INFO] frobbed toml for steadylearner/Rust_Blog written to work/ex/pr-56896/sources/master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980/gh/steadylearner/Rust_Blog/Cargo.toml
[INFO] started frobbing steadylearner/Rust_Blog
[INFO] finished frobbing steadylearner/Rust_Blog
[INFO] frobbed toml for steadylearner/Rust_Blog written to work/ex/pr-56896/sources/try#bad365140e1e8233b42b21af70a407f14ce5fec5/gh/steadylearner/Rust_Blog/Cargo.toml
[INFO] crate steadylearner/Rust_Blog 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 steadylearner/Rust_Blog against master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980 for pr-56896
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56896/worker-2/master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56896/sources/master#adbfec229ce07ff4b2a7bf2d6dec2d13cb224980/gh/steadylearner/Rust_Blog:/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] 2ae8ca35ea62372af96bf12c771667d1f643c59ab29a0ec86bcfc2336e001e8d
[INFO] running `"docker" "start" "-a" "2ae8ca35ea62372af96bf12c771667d1f643c59ab29a0ec86bcfc2336e001e8d"`
[INFO] [stderr]     Checking unic-char-range v0.7.0
[INFO] [stderr]    Compiling native-tls v0.2.2
[INFO] [stderr]     Checking unic-common v0.7.0
[INFO] [stderr]     Checking deunicode v0.4.3
[INFO] [stderr]    Compiling encoding_rs v0.8.10
[INFO] [stderr]     Checking humansize v1.1.0
[INFO] [stderr]    Compiling pulldown-cmark v0.1.2
[INFO] [stderr]     Checking pest v0.4.1
[INFO] [stderr]     Checking termios v0.3.1
[INFO] [stderr]    Compiling pest v2.0.1
[INFO] [stderr]     Checking clicolors-control v0.2.0
[INFO] [stderr]    Compiling pq-sys v0.4.6
[INFO] [stderr]     Checking unic-char-property v0.7.0
[INFO] [stderr]     Checking slug v0.1.4
[INFO] [stderr]     Checking mio v0.6.16
[INFO] [stderr]     Checking want v0.0.6
[INFO] [stderr]     Checking unic-ucd-version v0.7.0
[INFO] [stderr]     Checking uuid v0.7.1
[INFO] [stderr]     Checking tokio-io v0.1.10
[INFO] [stderr]     Checking fake v1.2.2
[INFO] [stderr]     Checking openssl-sys v0.9.39
[INFO] [stderr]    Compiling pear_codegen v0.0.20
[INFO] [stderr]    Compiling toml v0.4.8
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.1
[INFO] [stderr]     Checking unic-ucd-segment v0.7.0
[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" "2ae8ca35ea62372af96bf12c771667d1f643c59ab29a0ec86bcfc2336e001e8d"`
[INFO] running `"docker" "rm" "-f" "2ae8ca35ea62372af96bf12c771667d1f643c59ab29a0ec86bcfc2336e001e8d"`
[INFO] [stdout] 2ae8ca35ea62372af96bf12c771667d1f643c59ab29a0ec86bcfc2336e001e8d