[INFO] crate encoding 0.2.33 is already in cache
[INFO] checking encoding-0.2.33 against try#5e633973aa9255a88b65a39484627bb54e6044b3 for pr-66063
[INFO] extracting crate encoding 0.2.33 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate encoding 0.2.33 on toolchain 5e633973aa9255a88b65a39484627bb54e6044b3
[INFO] running `"/workspace/cargo-home/bin/cargo" "+5e633973aa9255a88b65a39484627bb54e6044b3" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate encoding 0.2.33
[INFO] removed path dependency encoding-index-japanese from crates.io crate encoding 0.2.33
[INFO] removed path dependency encoding-index-korean from crates.io crate encoding 0.2.33
[INFO] removed path dependency encoding-index-simpchinese from crates.io crate encoding 0.2.33
[INFO] removed path dependency encoding-index-singlebyte from crates.io crate encoding 0.2.33
[INFO] removed path dependency encoding-index-tradchinese from crates.io crate encoding 0.2.33
[INFO] finished tweaking crates.io crate encoding 0.2.33
[INFO] tweaked toml for crates.io crate encoding 0.2.33 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+5e633973aa9255a88b65a39484627bb54e6044b3" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+5e633973aa9255a88b65a39484627bb54e6044b3" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+5e633973aa9255a88b65a39484627bb54e6044b3" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 18e7b4e45699518d8f2fb169905e138adb23c6c6e6b9d67a6bf8208f2b401e82
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "18e7b4e45699518d8f2fb169905e138adb23c6c6e6b9d67a6bf8208f2b401e82"`
[INFO] [stderr]     Checking encoding v0.2.33 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]    --> src/lib.rs:207:19
[INFO] [stderr]     |
[INFO] [stderr] 207 | #![cfg_attr(test, feature(test))] // lib stability features as per RFC #507
[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 `encoding`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "18e7b4e45699518d8f2fb169905e138adb23c6c6e6b9d67a6bf8208f2b401e82"`
[INFO] running `"docker" "rm" "-f" "18e7b4e45699518d8f2fb169905e138adb23c6c6e6b9d67a6bf8208f2b401e82"`
[INFO] [stdout] 18e7b4e45699518d8f2fb169905e138adb23c6c6e6b9d67a6bf8208f2b401e82