[INFO] crate generator 0.6.10 is already in cache
[INFO] extracting crate generator 0.6.10 into work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/reg/generator/0.6.10
[INFO] extracting crate generator 0.6.10 into work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/reg/generator/0.6.10
[INFO] validating manifest of generator-0.6.10 on toolchain master#0f88167f89fffe321590c5148f21b7d51d44388d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of generator-0.6.10 on toolchain try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing generator-0.6.10
[INFO] finished frobbing generator-0.6.10
[INFO] frobbed toml for generator-0.6.10 written to work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/reg/generator/0.6.10/Cargo.toml
[INFO] started frobbing generator-0.6.10
[INFO] finished frobbing generator-0.6.10
[INFO] frobbed toml for generator-0.6.10 written to work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/reg/generator/0.6.10/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking generator-0.6.10 against try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b for pr-58948
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58948/worker-2/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/reg/generator/0.6.10:/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" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] ff89a73b06daefaf35a4757d4b4cb8970fc87ef6be1fe7ed714f2b0f61fe380a
[INFO] running `"docker" "start" "-a" "ff89a73b06daefaf35a4757d4b4cb8970fc87ef6be1fe7ed714f2b0f61fe380a"`
[INFO] [stderr]    Compiling generator v0.6.10 (/opt/crater/workdir)
[INFO] [stderr] error: unused doc comment
[INFO] [stderr]   --> src/rt.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 |   /// each thread has it's own generator context stack
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 13 | / thread_local!(static ROOT_CONTEXT: Box<Context> = {
[INFO] [stderr] 14 | |     let mut root = Box::new(Context::empty());
[INFO] [stderr] 15 | |     let p = &mut *root as *mut _;
[INFO] [stderr] 16 | |     root.parent = p; // init top to current
[INFO] [stderr] 17 | |     root
[INFO] [stderr] 18 | | });
[INFO] [stderr]    | |___- rustdoc does not generate documentation for macro expansions
[INFO] [stderr]    |
[INFO] [stderr] note: lint level defined here
[INFO] [stderr]   --> src/lib.rs:11:24
[INFO] [stderr]    |
[INFO] [stderr] 11 | #![cfg_attr(test, deny(warnings))]
[INFO] [stderr]    |                        ^^^^^^^^
[INFO] [stderr]    = note: #[deny(unused_doc_comments)] implied by #[deny(warnings)]
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/rt.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 |   /// each thread has it's own generator context stack
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 13 | / thread_local!(static ROOT_CONTEXT: Box<Context> = {
[INFO] [stderr] 14 | |     let mut root = Box::new(Context::empty());
[INFO] [stderr] 15 | |     let p = &mut *root as *mut _;
[INFO] [stderr] 16 | |     root.parent = p; // init top to current
[INFO] [stderr] 17 | |     root
[INFO] [stderr] 18 | | });
[INFO] [stderr]    | |___- rustdoc does not generate documentation for macro expansions
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_doc_comments)] on by default
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `generator`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "ff89a73b06daefaf35a4757d4b4cb8970fc87ef6be1fe7ed714f2b0f61fe380a"`
[INFO] running `"docker" "rm" "-f" "ff89a73b06daefaf35a4757d4b4cb8970fc87ef6be1fe7ed714f2b0f61fe380a"`
[INFO] [stdout] ff89a73b06daefaf35a4757d4b4cb8970fc87ef6be1fe7ed714f2b0f61fe380a