[INFO] cloning repository nebrelbug/NebBlogOS
[INFO] running `"git" "clone" "--bare" "git://github.com/nebrelbug/NebBlogOS.git" "work/cache/sources/gh/nebrelbug/NebBlogOS"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/nebrelbug/NebBlogOS'...
[INFO] running `"git" "clone" "work/cache/sources/gh/nebrelbug/NebBlogOS" "work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/nebrelbug/NebBlogOS"`
[INFO] [stderr] Cloning into 'work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/nebrelbug/NebBlogOS'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/nebrelbug/NebBlogOS" "work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/nebrelbug/NebBlogOS"`
[INFO] [stderr] Cloning into 'work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/nebrelbug/NebBlogOS'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 46a67a4857b04c36662eb9865457362d5f9f86af
[INFO] sha for GitHub repo nebrelbug/NebBlogOS: 46a67a4857b04c36662eb9865457362d5f9f86af
[INFO] validating manifest of nebrelbug/NebBlogOS on toolchain master#9f06855064ed06a50c496577b21ca50f92a2e67d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of nebrelbug/NebBlogOS on toolchain try#d3301713b54af69ca9de941a8c6b0d8287dbd6df
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing nebrelbug/NebBlogOS
[INFO] finished frobbing nebrelbug/NebBlogOS
[INFO] frobbed toml for nebrelbug/NebBlogOS written to work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/nebrelbug/NebBlogOS/Cargo.toml
[INFO] started frobbing nebrelbug/NebBlogOS
[INFO] finished frobbing nebrelbug/NebBlogOS
[INFO] frobbed toml for nebrelbug/NebBlogOS written to work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/nebrelbug/NebBlogOS/Cargo.toml
[INFO] crate nebrelbug/NebBlogOS already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking nebrelbug/NebBlogOS against master#9f06855064ed06a50c496577b21ca50f92a2e67d for pr-61874
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61874/worker-2/master#9f06855064ed06a50c496577b21ca50f92a2e67d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/nebrelbug/NebBlogOS:/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" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 71479dc309d2cb5637ae0093a4bdbe701777192a06decc0fedff67e7602b876d
[INFO] running `"docker" "start" "-a" "71479dc309d2cb5637ae0093a4bdbe701777192a06decc0fedff67e7602b876d"`
[INFO] [stderr]     Checking bit_field v0.7.0
[INFO] [stderr]     Checking bitflags v0.4.0
[INFO] [stderr]     Checking spin v0.4.8
[INFO] [stderr]     Checking volatile v0.1.0
[INFO] [stderr]     Checking rlibc v1.0.0
[INFO] [stderr]     Checking multiboot2 v0.1.0
[INFO] [stderr] error[E0635]: unknown feature `const_unsafe_cell_new`
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/spin-0.4.8/src/lib.rs:8:53
[INFO] [stderr]   |
[INFO] [stderr] 8 | #![cfg_attr(feature = "const_fn", feature(const_fn, const_unsafe_cell_new, const_atomic_usize_new))]
[INFO] [stderr]   |                                                     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0635]: unknown feature `const_atomic_usize_new`
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/spin-0.4.8/src/lib.rs:8:76
[INFO] [stderr]   |
[INFO] [stderr] 8 | #![cfg_attr(feature = "const_fn", feature(const_fn, const_unsafe_cell_new, const_atomic_usize_new))]
[INFO] [stderr]   |                                                                            ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0635`.
[INFO] [stderr] error: Could not compile `spin`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "71479dc309d2cb5637ae0093a4bdbe701777192a06decc0fedff67e7602b876d"`
[INFO] running `"docker" "rm" "-f" "71479dc309d2cb5637ae0093a4bdbe701777192a06decc0fedff67e7602b876d"`
[INFO] [stdout] 71479dc309d2cb5637ae0093a4bdbe701777192a06decc0fedff67e7602b876d