[INFO] fetching crate mdbook-epub 0.3.0...
[INFO] checking mdbook-epub-0.3.0 against try#38f08371587f97c145dedb2c055ac7b01bf1e788 for pr-65294
[INFO] extracting crate mdbook-epub 0.3.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate mdbook-epub 0.3.0 on toolchain 38f08371587f97c145dedb2c055ac7b01bf1e788
[INFO] running `"/workspace/cargo-home/bin/cargo" "+38f08371587f97c145dedb2c055ac7b01bf1e788" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate mdbook-epub 0.3.0
[INFO] finished tweaking crates.io crate mdbook-epub 0.3.0
[INFO] tweaked toml for crates.io crate mdbook-epub 0.3.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate mdbook-epub 0.3.0 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+38f08371587f97c145dedb2c055ac7b01bf1e788" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded epub-builder v0.4.4
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+38f08371587f97c145dedb2c055ac7b01bf1e788" "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] 8ca951321d6985e5abd9404f2bad646f0566a2d84cb0ac5d7d394ad9c9dca2dd
[INFO] running `"docker" "start" "-a" "8ca951321d6985e5abd9404f2bad646f0566a2d84cb0ac5d7d394ad9c9dca2dd"`
[INFO] [stderr]    Compiling libc v0.2.61
[INFO] [stderr]     Checking rustc-demangle v0.1.15
[INFO] [stderr]    Compiling pulldown-cmark v0.5.3
[INFO] [stderr]     Checking strum v0.15.0
[INFO] [stderr]     Checking maplit v1.0.1
[INFO] [stderr]     Checking is-match v0.1.0
[INFO] [stderr]     Checking open v1.3.2
[INFO] [stderr]     Checking shlex v0.1.1
[INFO] [stderr]    Compiling bzip2-sys v0.1.7
[INFO] [stderr]    Compiling miniz_oxide_c_api v0.2.3
[INFO] [stderr]     Checking getopts v0.2.19
[INFO] [stderr]    Compiling ryu v1.0.0
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]     Checking toml v0.5.1
[INFO] [stderr]     Checking hashbrown v0.5.0
[INFO] [stderr]     Checking mustache v0.9.0
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]    Compiling serde_derive v1.0.98
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]    Compiling darling_core v0.8.6
[INFO] [stderr]    Compiling html5ever v0.23.0
[INFO] [stderr]    Compiling pest_generator v2.1.0
[INFO] [stderr]    Compiling strum_macros v0.15.0
[INFO] [stderr]    Compiling structopt-derive v0.2.18
[INFO] [stderr]    Compiling serde_json v1.0.40
[INFO] [stderr] error[E0518]: attribute should be applied to function or closure
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/pulldown-cmark-0.5.3/src/parse.rs:126:1
[INFO] [stderr]     |
[INFO] [stderr] 126 | / bitflags! {
[INFO] [stderr] 127 | |     pub struct Options: u32 {
[INFO] [stderr] 128 | |         const FIRST_PASS = 1 << 0;
[INFO] [stderr] 129 | |         const ENABLE_TABLES = 1 << 1;
[INFO] [stderr] ...   |
[INFO] [stderr] 133 | |     }
[INFO] [stderr] 134 | | }
[INFO] [stderr]     | |_^ not a function or closure
[INFO] [stderr]     |
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0518]: attribute should be applied to function or closure
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/pulldown-cmark-0.5.3/src/parse.rs:126:1
[INFO] [stderr]     |
[INFO] [stderr] 126 | / bitflags! {
[INFO] [stderr] 127 | |     pub struct Options: u32 {
[INFO] [stderr] 128 | |         const FIRST_PASS = 1 << 0;
[INFO] [stderr] 129 | |         const ENABLE_TABLES = 1 << 1;
[INFO] [stderr] ...   |
[INFO] [stderr] 133 | |     }
[INFO] [stderr] 134 | | }
[INFO] [stderr]     | |_^ not a function or closure
[INFO] [stderr]     |
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0518]: attribute should be applied to function or closure
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/pulldown-cmark-0.5.3/src/parse.rs:126:1
[INFO] [stderr]     |
[INFO] [stderr] 126 | / bitflags! {
[INFO] [stderr] 127 | |     pub struct Options: u32 {
[INFO] [stderr] 128 | |         const FIRST_PASS = 1 << 0;
[INFO] [stderr] 129 | |         const ENABLE_TABLES = 1 << 1;
[INFO] [stderr] ...   |
[INFO] [stderr] 133 | |     }
[INFO] [stderr] 134 | | }
[INFO] [stderr]     | |_^ not a function or closure
[INFO] [stderr]     |
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0518]: attribute should be applied to function or closure
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/pulldown-cmark-0.5.3/src/parse.rs:126:1
[INFO] [stderr]     |
[INFO] [stderr] 126 | / bitflags! {
[INFO] [stderr] 127 | |     pub struct Options: u32 {
[INFO] [stderr] 128 | |         const FIRST_PASS = 1 << 0;
[INFO] [stderr] 129 | |         const ENABLE_TABLES = 1 << 1;
[INFO] [stderr] ...   |
[INFO] [stderr] 133 | |     }
[INFO] [stderr] 134 | | }
[INFO] [stderr]     | |_^ not a function or closure
[INFO] [stderr]     |
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0518]: attribute should be applied to function or closure
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/pulldown-cmark-0.5.3/src/parse.rs:126:1
[INFO] [stderr]     |
[INFO] [stderr] 126 | / bitflags! {
[INFO] [stderr] 127 | |     pub struct Options: u32 {
[INFO] [stderr] 128 | |         const FIRST_PASS = 1 << 0;
[INFO] [stderr] 129 | |         const ENABLE_TABLES = 1 << 1;
[INFO] [stderr] ...   |
[INFO] [stderr] 133 | |     }
[INFO] [stderr] 134 | | }
[INFO] [stderr]     | |_^ not a function or closure
[INFO] [stderr]     |
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0518]: attribute should be applied to function or closure
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/pulldown-cmark-0.5.3/src/parse.rs:126:1
[INFO] [stderr]     |
[INFO] [stderr] 126 | / bitflags! {
[INFO] [stderr] 127 | |     pub struct Options: u32 {
[INFO] [stderr] 128 | |         const FIRST_PASS = 1 << 0;
[INFO] [stderr] 129 | |         const ENABLE_TABLES = 1 << 1;
[INFO] [stderr] ...   |
[INFO] [stderr] 133 | |     }
[INFO] [stderr] 134 | | }
[INFO] [stderr]     | |_^ not a function or closure
[INFO] [stderr]     |
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 6 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0518`.
[INFO] [stderr] error: could not compile `pulldown-cmark`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "8ca951321d6985e5abd9404f2bad646f0566a2d84cb0ac5d7d394ad9c9dca2dd"`
[INFO] running `"docker" "rm" "-f" "8ca951321d6985e5abd9404f2bad646f0566a2d84cb0ac5d7d394ad9c9dca2dd"`
[INFO] [stdout] 8ca951321d6985e5abd9404f2bad646f0566a2d84cb0ac5d7d394ad9c9dca2dd