[INFO] crate monad_macros 0.0.1 is already in cache
[INFO] extracting crate monad_macros 0.0.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/monad_macros/0.0.1
[INFO] extracting crate monad_macros 0.0.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/monad_macros/0.0.1
[INFO] validating manifest of monad_macros-0.0.1 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of monad_macros-0.0.1 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing monad_macros-0.0.1
[INFO] finished frobbing monad_macros-0.0.1
[INFO] frobbed toml for monad_macros-0.0.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/monad_macros/0.0.1/Cargo.toml
[INFO] started frobbing monad_macros-0.0.1
[INFO] finished frobbing monad_macros-0.0.1
[INFO] frobbed toml for monad_macros-0.0.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/monad_macros/0.0.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing monad_macros-0.0.1 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/monad_macros/0.0.1:/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=warn" "-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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 2240c443b7b9139ad8919a6c76b5370979c920dc3153bed582a453453a0d28ba
[INFO] running `"docker" "start" "-a" "2240c443b7b9139ad8919a6c76b5370979c920dc3153bed582a453453a0d28ba"`
[INFO] [stderr]    Compiling monad_macros v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] error: `$p:pat` is followed by `:`, which is not allowed for `pat` fragments
[INFO] [stderr]   --> src/lib.rs:16:17
[INFO] [stderr]    |
[INFO] [stderr] 16 |         $p: pat : $ty: ty <- $e: expr ; $( $t: tt )*
[INFO] [stderr]    |                 ^ not allowed after `pat` fragments
[INFO] [stderr]    |
[INFO] [stderr]    = note: allowed there are: `=>`, `,`, `=`, `|`, `if` or `in`
[INFO] [stderr] 
[INFO] [stderr] error: `$ty:ty` is followed by `<-`, which is not allowed for `ty` fragments
[INFO] [stderr]   --> src/lib.rs:16:27
[INFO] [stderr]    |
[INFO] [stderr] 16 |         $p: pat : $ty: ty <- $e: expr ; $( $t: tt )*
[INFO] [stderr]    |                           ^^ not allowed after `ty` fragments
[INFO] [stderr]    |
[INFO] [stderr]    = note: allowed there are: `{`, `[`, `=>`, `,`, `>`, `=`, `:`, `;`, `|`, `as` or `where`
[INFO] [stderr] 
[INFO] [stderr] error: `$p:pat` is followed by `<-`, which is not allowed for `pat` fragments
[INFO] [stderr]   --> src/lib.rs:21:17
[INFO] [stderr]    |
[INFO] [stderr] 21 |         $p: pat <- $e: expr ; $( $t: tt )*
[INFO] [stderr]    |                 ^^ not allowed after `pat` fragments
[INFO] [stderr]    |
[INFO] [stderr]    = note: allowed there are: `=>`, `,`, `=`, `|`, `if` or `in`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(macro_rules)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `monad_macros`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "2240c443b7b9139ad8919a6c76b5370979c920dc3153bed582a453453a0d28ba"`
[INFO] running `"docker" "rm" "-f" "2240c443b7b9139ad8919a6c76b5370979c920dc3153bed582a453453a0d28ba"`
[INFO] [stdout] 2240c443b7b9139ad8919a6c76b5370979c920dc3153bed582a453453a0d28ba