[INFO] updating cached repository https://github.com/nrc/clyde
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 43fcd18cbbe417f88baf736fce94f3d572ff43ea
[INFO] checking nrc/clyde against try#8810c24b0958114d8dbb32d878444e8956fce80f for pr-66063
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnrc%2Fclyde" "/workspace/builds/worker-3/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nrc/clyde on toolchain 8810c24b0958114d8dbb32d878444e8956fce80f
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8810c24b0958114d8dbb32d878444e8956fce80f" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/nrc/clyde
[INFO] finished tweaking git repo https://github.com/nrc/clyde
[INFO] tweaked toml for git repo https://github.com/nrc/clyde written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/nrc/clyde already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8810c24b0958114d8dbb32d878444e8956fce80f" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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=allow" "-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" "+8810c24b0958114d8dbb32d878444e8956fce80f" "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] d506e7be8ab2609662cba78084cf9554b661576c608fcdf33f62507b7a4d818d
[INFO] running `"docker" "start" "-a" "d506e7be8ab2609662cba78084cf9554b661576c608fcdf33f62507b7a4d818d"`
[INFO] [stderr]    Compiling syn v0.15.40
[INFO] [stderr]     Checking rls-span v0.5.2
[INFO] [stderr]     Checking fst v0.3.3
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rls-span-0.5.2/src/lib.rs:1:34
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![cfg_attr(feature = "nightly", feature(step_trait))]
[INFO] [stderr]   |                                  ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `rls-span`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "d506e7be8ab2609662cba78084cf9554b661576c608fcdf33f62507b7a4d818d"`
[INFO] running `"docker" "rm" "-f" "d506e7be8ab2609662cba78084cf9554b661576c608fcdf33f62507b7a4d818d"`
[INFO] [stdout] d506e7be8ab2609662cba78084cf9554b661576c608fcdf33f62507b7a4d818d