[INFO] crate kg-symbol 0.1.8 is already in cache
[INFO] extracting crate kg-symbol 0.1.8 into work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/reg/kg-symbol/0.1.8
[INFO] extracting crate kg-symbol 0.1.8 into work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/reg/kg-symbol/0.1.8
[INFO] validating manifest of kg-symbol-0.1.8 on toolchain master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of kg-symbol-0.1.8 on toolchain try#58b21121d0b447ceb3f1a655155d802191acf044
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+58b21121d0b447ceb3f1a655155d802191acf044-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing kg-symbol-0.1.8
[INFO] finished frobbing kg-symbol-0.1.8
[INFO] frobbed toml for kg-symbol-0.1.8 written to work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/reg/kg-symbol/0.1.8/Cargo.toml
[INFO] started frobbing kg-symbol-0.1.8
[INFO] finished frobbing kg-symbol-0.1.8
[INFO] frobbed toml for kg-symbol-0.1.8 written to work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/reg/kg-symbol/0.1.8/Cargo.toml
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+58b21121d0b447ceb3f1a655155d802191acf044-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+58b21121d0b447ceb3f1a655155d802191acf044-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] checking kg-symbol-0.1.8 against master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504 for pr-61100
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-61100/worker-4/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/reg/kg-symbol/0.1.8:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] aae4bdab170a3ecbc01bb958a4a18795819b63d12a1d4031f1075e8e6b5c933a
[INFO] running `"docker" "start" "-a" "aae4bdab170a3ecbc01bb958a4a18795819b63d12a1d4031f1075e8e6b5c933a"`
[INFO] [stderr]     Checking parking_lot_core v0.3.1
[INFO] [stderr]     Checking parking_lot v0.6.4
[INFO] [stderr]     Checking kg-symbol v0.1.8 (/opt/crater/workdir)
[INFO] [stderr] error[E0658]: use of unstable library feature 'alloc_layout_extra'
[INFO] [stderr]   --> src/lib.rs:50:33
[INFO] [stderr]    |
[INFO] [stderr] 50 |         Layout::new::<Header>().extend(Layout::from_size_align_unchecked(len, 1)).unwrap()
[INFO] [stderr]    |                                 ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/55724
[INFO] [stderr]    = help: add #![feature(alloc_layout_extra)] to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0658`.
[INFO] [stderr] error: Could not compile `kg-symbol`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0658]: use of unstable library feature 'alloc_layout_extra'
[INFO] [stderr]   --> src/lib.rs:50:33
[INFO] [stderr]    |
[INFO] [stderr] 50 |         Layout::new::<Header>().extend(Layout::from_size_align_unchecked(len, 1)).unwrap()
[INFO] [stderr]    |                                 ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/55724
[INFO] [stderr]    = help: add #![feature(alloc_layout_extra)] to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0658`.
[INFO] [stderr] error: Could not compile `kg-symbol`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "aae4bdab170a3ecbc01bb958a4a18795819b63d12a1d4031f1075e8e6b5c933a"`
[INFO] running `"docker" "rm" "-f" "aae4bdab170a3ecbc01bb958a4a18795819b63d12a1d4031f1075e8e6b5c933a"`
[INFO] [stdout] aae4bdab170a3ecbc01bb958a4a18795819b63d12a1d4031f1075e8e6b5c933a