[INFO] crate gap_vec 0.1.0 is already in cache
[INFO] testing gap_vec-0.1.0 against 1.38.0 for beta-1.39-1
[INFO] extracting crate gap_vec 0.1.0 into work/builds/worker-1/source
[INFO] validating manifest of crates.io crate gap_vec 0.1.0 on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate gap_vec 0.1.0
[INFO] finished tweaking crates.io crate gap_vec 0.1.0
[INFO] tweaked toml for crates.io crate gap_vec 0.1.0 written to work/builds/worker-1/source/Cargo.toml
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] f7d1be852b9c22162666fea583c0051f0a179dc71379f9f8f410f3d12ce2a786
[INFO] running `"docker" "start" "-a" "f7d1be852b9c22162666fea583c0051f0a179dc71379f9f8f410f3d12ce2a786"`
[INFO] [stderr]    Compiling gap_vec v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> src/lib.rs:44:1
[INFO] [stderr]    |
[INFO] [stderr] 44 | #![feature(core_intrinsics, alloc, raw_vec_internals)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `cap` found for type `alloc::raw_vec::RawVec<T>` in the current scope
[INFO] [stderr]    --> src/lib.rs:147:18
[INFO] [stderr]     |
[INFO] [stderr] 147 |         self.buf.cap()
[INFO] [stderr]     |                  ^^^ private field, not a method
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `cap` found for type `alloc::raw_vec::RawVec<_>` in the current scope
[INFO] [stderr]    --> src/lib.rs:306:49
[INFO] [stderr]     |
[INFO] [stderr] 306 |         let new_gap = self.gap.start .. new_buf.cap() - after_gap;
[INFO] [stderr]     |                                                 ^^^ private field, not a method
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0554, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `gap_vec`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "f7d1be852b9c22162666fea583c0051f0a179dc71379f9f8f410f3d12ce2a786"`
[INFO] running `"docker" "rm" "-f" "f7d1be852b9c22162666fea583c0051f0a179dc71379f9f8f410f3d12ce2a786"`
[INFO] [stdout] f7d1be852b9c22162666fea583c0051f0a179dc71379f9f8f410f3d12ce2a786