[INFO] crate orbtk-simple-modal 0.1.0 is already in cache
[INFO] checking orbtk-simple-modal-0.1.0 against try#5e633973aa9255a88b65a39484627bb54e6044b3 for pr-66063
[INFO] extracting crate orbtk-simple-modal 0.1.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate orbtk-simple-modal 0.1.0 on toolchain 5e633973aa9255a88b65a39484627bb54e6044b3
[INFO] running `"/workspace/cargo-home/bin/cargo" "+5e633973aa9255a88b65a39484627bb54e6044b3" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate orbtk-simple-modal 0.1.0
[INFO] finished tweaking crates.io crate orbtk-simple-modal 0.1.0
[INFO] tweaked toml for crates.io crate orbtk-simple-modal 0.1.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+5e633973aa9255a88b65a39484627bb54e6044b3" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/workspace/cargo-home/bin/cargo" "+5e633973aa9255a88b65a39484627bb54e6044b3" "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-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 259be58b4fda5f2c99702549f018f9e97e9165122eee097545466612bde269f5
[INFO] running `"docker" "start" "-a" "259be58b4fda5f2c99702549f018f9e97e9165122eee097545466612bde269f5"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling procedural-masquerade v0.1.6
[INFO] [stderr]     Checking resize v0.3.0
[INFO] [stderr]     Checking inflate v0.4.5
[INFO] [stderr]     Checking phf_shared v0.7.24
[INFO] [stderr]     Checking gif v0.10.3
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]    Compiling syn v1.0.7
[INFO] [stderr]     Checking num-rational v0.2.2
[INFO] [stderr]     Checking orbclient v0.3.27
[INFO] [stderr]     Checking jpeg-decoder v0.1.16
[INFO] [stderr]     Checking phf v0.7.24
[INFO] [stderr]     Checking png v0.14.1
[INFO] [stderr]     Checking orbfont v0.1.8
[INFO] [stderr]    Compiling cssparser v0.16.1
[INFO] [stderr]     Checking tiff v0.2.2
[INFO] [stderr]     Checking image v0.21.3
[INFO] [stderr]     Checking orbimage v0.1.17
[INFO] [stderr]    Compiling cssparser-macros v0.3.6
[INFO] [stderr]     Checking orbtk v0.2.29
[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/orbtk-0.2.29/src/lib.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(const_fn)]
[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 `orbtk`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "259be58b4fda5f2c99702549f018f9e97e9165122eee097545466612bde269f5"`
[INFO] running `"docker" "rm" "-f" "259be58b4fda5f2c99702549f018f9e97e9165122eee097545466612bde269f5"`
[INFO] [stdout] 259be58b4fda5f2c99702549f018f9e97e9165122eee097545466612bde269f5