[INFO] fetching crate rcmark 0.1.0...
[INFO] checking rcmark-0.1.0 against master#446e5e57b667c841ba3ebb4b41b44fb98bd3af4b for pr-65294
[INFO] extracting crate rcmark 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate rcmark 0.1.0 on toolchain 446e5e57b667c841ba3ebb4b41b44fb98bd3af4b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+446e5e57b667c841ba3ebb4b41b44fb98bd3af4b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate rcmark 0.1.0
[INFO] removed path dependency libcmark-sys from crates.io crate rcmark 0.1.0
[INFO] finished tweaking crates.io crate rcmark 0.1.0
[INFO] tweaked toml for crates.io crate rcmark 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+446e5e57b667c841ba3ebb4b41b44fb98bd3af4b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+446e5e57b667c841ba3ebb4b41b44fb98bd3af4b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+446e5e57b667c841ba3ebb4b41b44fb98bd3af4b" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 636dfb08df2bb30a52872fd0b4187edaa1b7f985d963d452a15fefb69fdee6de
[INFO] running `"docker" "start" "-a" "636dfb08df2bb30a52872fd0b4187edaa1b7f985d963d452a15fefb69fdee6de"`
[INFO] [stderr]    Compiling libcmark-sys v0.1.0
[INFO] [stderr]     Checking rcmark v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]    --> src/lib.rs:264:1
[INFO] [stderr]     |
[INFO] [stderr] 264 |   /// Options for parsing and rendering a node tree.
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 265 | / bitflags! {
[INFO] [stderr] 266 | |     flags CmarkOptions: i32 {
[INFO] [stderr] 267 | |         #[doc="Default writer options"]
[INFO] [stderr] 268 | |         const DEFAULT = raw::CMARK_OPT_DEFAULT as i32,
[INFO] [stderr] ...   |
[INFO] [stderr] 277 | |     }
[INFO] [stderr] 278 | | }
[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] warning: unused doc comment
[INFO] [stderr]    --> src/lib.rs:264:1
[INFO] [stderr]     |
[INFO] [stderr] 264 |   /// Options for parsing and rendering a node tree.
[INFO] [stderr]     |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 265 | / bitflags! {
[INFO] [stderr] 266 | |     flags CmarkOptions: i32 {
[INFO] [stderr] 267 | |         #[doc="Default writer options"]
[INFO] [stderr] 268 | |         const DEFAULT = raw::CMARK_OPT_DEFAULT as i32,
[INFO] [stderr] ...   |
[INFO] [stderr] 277 | |     }
[INFO] [stderr] 278 | | }
[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: use of extern static is unsafe and requires unsafe function or block (error E0133)
[INFO] [stderr]    --> src/lib.rs:293:5
[INFO] [stderr]     |
[INFO] [stderr] 293 |     raw::cmark_version as i32
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[deny(safe_extern_statics)]` on by default
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]     = note: for more information, see issue #36247 <https://github.com/rust-lang/rust/issues/36247>
[INFO] [stderr]     = note: extern statics are not controlled by the Rust type system: invalid data, aliasing violations or data races will cause undefined behavior
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `rcmark`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: use of extern static is unsafe and requires unsafe function or block (error E0133)
[INFO] [stderr]    --> src/lib.rs:293:5
[INFO] [stderr]     |
[INFO] [stderr] 293 |     raw::cmark_version as i32
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[deny(safe_extern_statics)]` on by default
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]     = note: for more information, see issue #36247 <https://github.com/rust-lang/rust/issues/36247>
[INFO] [stderr]     = note: extern statics are not controlled by the Rust type system: invalid data, aliasing violations or data races will cause undefined behavior
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `rcmark`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "636dfb08df2bb30a52872fd0b4187edaa1b7f985d963d452a15fefb69fdee6de"`
[INFO] running `"docker" "rm" "-f" "636dfb08df2bb30a52872fd0b4187edaa1b7f985d963d452a15fefb69fdee6de"`
[INFO] [stdout] 636dfb08df2bb30a52872fd0b4187edaa1b7f985d963d452a15fefb69fdee6de