[INFO] cloning repository https://github.com/LooMaclin/concat_const_example
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LooMaclin/concat_const_example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLooMaclin%2Fconcat_const_example"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLooMaclin%2Fconcat_const_example'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] bdc5902bdcf36109bf683566f15bfa0021882f43
[INFO] checking LooMaclin/concat_const_example against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLooMaclin%2Fconcat_const_example" "/workspace/builds/worker-0/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LooMaclin/concat_const_example on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/LooMaclin/concat_const_example
[INFO] finished tweaking git repo https://github.com/LooMaclin/concat_const_example
[INFO] tweaked toml for git repo https://github.com/LooMaclin/concat_const_example written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/LooMaclin/concat_const_example already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[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" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "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] 231da486505a8cc596bed368673a728dc98b6e0762ac3f8405b1a0add0d0565c
[INFO] running `"docker" "start" "-a" "231da486505a8cc596bed368673a728dc98b6e0762ac3f8405b1a0add0d0565c"`
[INFO] [stderr]     Checking const-concat v0.1.1 (https://github.com/Candunc/const-concat?branch=patch-1#7fbd831e)
[INFO] [stderr] error[E0635]: unknown feature `const_str_as_bytes`
[INFO] [stderr]   --> /opt/rustwide/cargo-home/git/checkouts/const-concat-07bb967c112852f5/7fbd831/src/lib.rs:24:38
[INFO] [stderr]    |
[INFO] [stderr] 24 | #![feature(const_fn, const_fn_union, const_str_as_bytes, const_str_len, untagged_unions)]
[INFO] [stderr]    |                                      ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0635]: unknown feature `const_str_len`
[INFO] [stderr]   --> /opt/rustwide/cargo-home/git/checkouts/const-concat-07bb967c112852f5/7fbd831/src/lib.rs:24:58
[INFO] [stderr]    |
[INFO] [stderr] 24 | #![feature(const_fn, const_fn_union, const_str_as_bytes, const_str_len, untagged_unions)]
[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 `const-concat`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "231da486505a8cc596bed368673a728dc98b6e0762ac3f8405b1a0add0d0565c"`
[INFO] running `"docker" "rm" "-f" "231da486505a8cc596bed368673a728dc98b6e0762ac3f8405b1a0add0d0565c"`
[INFO] [stdout] 231da486505a8cc596bed368673a728dc98b6e0762ac3f8405b1a0add0d0565c