[INFO] cloning repository anderejd/extern_attrib
[INFO] running `"git" "clone" "--bare" "git://github.com/anderejd/extern_attrib.git" "work/cache/sources/gh/anderejd/extern_attrib"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/anderejd/extern_attrib'...
[INFO] running `"git" "clone" "work/cache/sources/gh/anderejd/extern_attrib" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/anderejd/extern_attrib"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/anderejd/extern_attrib'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/anderejd/extern_attrib" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/anderejd/extern_attrib"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/anderejd/extern_attrib'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a70c0caf5ddb993cde6e65d89b125f168e1d5dcc
[INFO] sha for GitHub repo anderejd/extern_attrib: a70c0caf5ddb993cde6e65d89b125f168e1d5dcc
[INFO] validating manifest of anderejd/extern_attrib on toolchain master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of anderejd/extern_attrib on toolchain try#8f81d0bf6baf07b92f1246696722485c4ca0b049
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing anderejd/extern_attrib
[INFO] finished frobbing anderejd/extern_attrib
[INFO] frobbed toml for anderejd/extern_attrib written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/anderejd/extern_attrib/Cargo.toml
[INFO] started frobbing anderejd/extern_attrib
[INFO] finished frobbing anderejd/extern_attrib
[INFO] frobbed toml for anderejd/extern_attrib written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/anderejd/extern_attrib/Cargo.toml
[INFO] crate anderejd/extern_attrib already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/ec2-user/crater/work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/anderejd/extern_attrib/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking anderejd/extern_attrib against try#8f81d0bf6baf07b92f1246696722485c4ca0b049 for pr-62008
[INFO] running `"docker" "create" "-v" "/mnt/big/ec2-user/crater/work/local/target-dirs/pr-62008/worker-2/try#8f81d0bf6baf07b92f1246696722485c4ca0b049:/opt/crater/target:rw,Z" "-v" "/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/anderejd/extern_attrib:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/ec2-user/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/ec2-user/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" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 62f903254c1345f3add5d80f21295d159dbe4c630f5b524e648f715020ad4bec
[INFO] running `"docker" "start" "-a" "62f903254c1345f3add5d80f21295d159dbe4c630f5b524e648f715020ad4bec"`
[INFO] [stderr]     Checking syn v0.11.11
[INFO] [stderr]    Compiling extern_attrib v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/lib.rs:35:7
[INFO] [stderr]    |
[INFO] [stderr] 35 |       { //! This scope drops abi_opt after mutation.
[INFO] [stderr]    |  _____- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 36 | |         let abi_opt = match item.node {
[INFO] [stderr] 37 | |             ItemKind::Fn(_, _, _, ref mut opt, _, _) => opt,
[INFO] [stderr] 38 | |             _ => return input
[INFO] [stderr] 39 | |         };
[INFO] [stderr] 40 | |         modify_abi(abi_opt);
[INFO] [stderr] 41 | |     }
[INFO] [stderr]    | |_____- rustdoc does not generate documentation for expressions
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_doc_comments)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: meta-variable repeats with different Kleene operator
[INFO] [stderr]  --> <::quote::quote macros>:4:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | (  ) => { $ crate :: Tokens :: new (  ) } ; ( $ ( $ tt : tt ) + ) => {
[INFO] [stderr]   |                                                               - expected repetition
[INFO] [stderr] ...
[INFO] [stderr] 4 | _s $ ( $ tt ) * ) ; _s } } ;
[INFO] [stderr]   |        ^^^^   - conflicting repetition
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[deny(meta_variable_misuse)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `extern_attrib`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "62f903254c1345f3add5d80f21295d159dbe4c630f5b524e648f715020ad4bec"`
[INFO] running `"docker" "rm" "-f" "62f903254c1345f3add5d80f21295d159dbe4c630f5b524e648f715020ad4bec"`
[INFO] [stdout] 62f903254c1345f3add5d80f21295d159dbe4c630f5b524e648f715020ad4bec