[INFO] updating cached repository cre-chan/MCIR
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/cre-chan/MCIR
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/cre-chan/MCIR" "work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/cre-chan/MCIR"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/cre-chan/MCIR'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/cre-chan/MCIR" "work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/cre-chan/MCIR"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/cre-chan/MCIR'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6fad22678369753dbfcb2775396faeee3f94bdb7
[INFO] sha for GitHub repo cre-chan/MCIR: 6fad22678369753dbfcb2775396faeee3f94bdb7
[INFO] validating manifest of cre-chan/MCIR on toolchain master#435236b8877cdb98c82eaebfb7887782277265c5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of cre-chan/MCIR on toolchain try#b5c7f157c20453dde8d47371abe73b32351b4e7f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing cre-chan/MCIR
[INFO] finished frobbing cre-chan/MCIR
[INFO] frobbed toml for cre-chan/MCIR written to work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/cre-chan/MCIR/Cargo.toml
[INFO] started frobbing cre-chan/MCIR
[INFO] finished frobbing cre-chan/MCIR
[INFO] frobbed toml for cre-chan/MCIR written to work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/cre-chan/MCIR/Cargo.toml
[INFO] crate cre-chan/MCIR already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking cre-chan/MCIR against try#b5c7f157c20453dde8d47371abe73b32351b4e7f for pr-62849
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62849/worker-0/try#b5c7f157c20453dde8d47371abe73b32351b4e7f:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/cre-chan/MCIR:/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" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 4807f1a821afc4bd419ba77ddf96585646899de6a18c51c141e3aa6c95561f9f
[INFO] running `"docker" "start" "-a" "4807f1a821afc4bd419ba77ddf96585646899de6a18c51c141e3aa6c95561f9f"`
[INFO] [stderr]    Compiling syn v0.15.37
[INFO] [stderr]    Compiling pest v2.1.1
[INFO] [stderr]    Compiling pest_meta v2.1.1
[INFO] [stderr]    Compiling pest_generator v2.1.0
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]     Checking MCIR v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error: expected outer doc comment
[INFO] [stderr]   --> src/frontend/parser/AST.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | //! syntactical structure for the left values.
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: inner doc comments like this (starting with `//!` or `/*!`) can only appear before items
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `MCIR`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: expected outer doc comment
[INFO] [stderr]   --> src/frontend/parser/AST.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | //! syntactical structure for the left values.
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: inner doc comments like this (starting with `//!` or `/*!`) can only appear before items
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `MCIR`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "4807f1a821afc4bd419ba77ddf96585646899de6a18c51c141e3aa6c95561f9f"`
[INFO] running `"docker" "rm" "-f" "4807f1a821afc4bd419ba77ddf96585646899de6a18c51c141e3aa6c95561f9f"`
[INFO] [stdout] 4807f1a821afc4bd419ba77ddf96585646899de6a18c51c141e3aa6c95561f9f