[INFO] crate yew_form_derive 0.1.4 is already in cache
[INFO] testing yew_form_derive-0.1.4 against 1.44.0 for beta-1.45-1
[INFO] extracting crate yew_form_derive 0.1.4 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate yew_form_derive 0.1.4 on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate yew_form_derive 0.1.4
[INFO] finished tweaking crates.io crate yew_form_derive 0.1.4
[INFO] tweaked toml for crates.io crate yew_form_derive 0.1.4 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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=warn" "-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" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] ba277f7ea02f3826dac67aa72aebce1c2884140a5ae7607bd3dab27268c5955a
[INFO] running `"docker" "start" "-a" "ba277f7ea02f3826dac67aa72aebce1c2884140a5ae7607bd3dab27268c5955a"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling stdweb-internal-runtime v0.1.5
[INFO] [stderr]    Compiling base-x v0.2.6
[INFO] [stderr]    Compiling yew v0.12.0
[INFO] [stderr]    Compiling discard v1.0.4
[INFO] [stderr]    Compiling if_chain v1.0.0
[INFO] [stderr]    Compiling stdweb v0.4.20
[INFO] [stderr]    Compiling thiserror-impl v1.0.19
[INFO] [stderr]    Compiling yew-macro v0.12.0
[INFO] [stderr]    Compiling stdweb-derive v0.5.3
[INFO] [stderr]    Compiling serde_json v1.0.53
[INFO] [stderr]    Compiling validator v0.10.0
[INFO] [stderr]    Compiling stdweb-internal-macros v0.2.9
[INFO] [stderr]    Compiling thiserror v1.0.19
[INFO] [stderr]    Compiling validator_derive v0.10.0
[INFO] [stderr]    Compiling yew_form v0.1.4
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/yew_form-0.1.4/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(get_mut_unchecked)]
[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 `yew_form`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "ba277f7ea02f3826dac67aa72aebce1c2884140a5ae7607bd3dab27268c5955a"`
[INFO] running `"docker" "rm" "-f" "ba277f7ea02f3826dac67aa72aebce1c2884140a5ae7607bd3dab27268c5955a"`
[INFO] [stdout] ba277f7ea02f3826dac67aa72aebce1c2884140a5ae7607bd3dab27268c5955a