[INFO] updating cached repository https://github.com/gloriousfutureio/changes
[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] c719c85d958e62bfec768d1db78cd763454a468a
[INFO] testing gloriousfutureio/changes against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgloriousfutureio%2Fchanges" "/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/gloriousfutureio/changes on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/gloriousfutureio/changes
[INFO] finished tweaking git repo https://github.com/gloriousfutureio/changes
[INFO] tweaked toml for git repo https://github.com/gloriousfutureio/changes written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/gloriousfutureio/changes already has a lockfile, it will not be regenerated
[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-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=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] cb792a5ea94559ac6d90f48064683fa7f544f08f979f8b8e677b8cd5dc790048
[INFO] running `"docker" "start" "-a" "cb792a5ea94559ac6d90f48064683fa7f544f08f979f8b8e677b8cd5dc790048"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling libc v0.2.40
[INFO] [stderr]    Compiling cfg-if v0.1.3
[INFO] [stderr]    Compiling version_check v0.1.3
[INFO] [stderr]    Compiling byteorder v1.2.2
[INFO] [stderr]    Compiling cc v1.0.15
[INFO] [stderr]    Compiling futures v0.1.21
[INFO] [stderr]    Compiling serde v1.0.45
[INFO] [stderr]    Compiling safemem v0.2.0
[INFO] [stderr]    Compiling num-traits v0.2.2
[INFO] [stderr]    Compiling rayon-core v1.4.0
[INFO] [stderr]    Compiling matches v0.1.6
[INFO] [stderr]    Compiling unicode-normalization v0.1.6
[INFO] [stderr]    Compiling foreign-types-shared v0.1.1
[INFO] [stderr]    Compiling siphasher v0.2.2
[INFO] [stderr]    Compiling httparse v1.2.4
[INFO] [stderr]    Compiling openssl v0.9.24
[INFO] [stderr]    Compiling scoped-tls v0.1.2
[INFO] [stderr]    Compiling untrusted v0.5.1
[INFO] [stderr]    Compiling build_const v0.2.1
[INFO] [stderr]    Compiling either v1.5.0
[INFO] [stderr]    Compiling openssl v0.10.7
[INFO] [stderr]    Compiling itoa v0.4.1
[INFO] [stderr]    Compiling ordermap v0.2.13
[INFO] [stderr]    Compiling smallvec v0.6.1
[INFO] [stderr]    Compiling pear v0.0.16
[INFO] [stderr]    Compiling literalext v0.1.1
[INFO] [stderr]    Compiling maud_htmlescape v0.17.0 (https://github.com/lfairy/maud.git#7c63fc13)
[INFO] [stderr]    Compiling hex v0.3.2
[INFO] [stderr]    Compiling proc-macro2 v0.3.8
[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/literalext-0.1.1/src/lib.rs:19:37
[INFO] [stderr]    |
[INFO] [stderr] 19 | #![cfg_attr(feature = "proc-macro", feature(proc_macro))]
[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 `literalext`.
[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" "cb792a5ea94559ac6d90f48064683fa7f544f08f979f8b8e677b8cd5dc790048"`
[INFO] running `"docker" "rm" "-f" "cb792a5ea94559ac6d90f48064683fa7f544f08f979f8b8e677b8cd5dc790048"`
[INFO] [stdout] cb792a5ea94559ac6d90f48064683fa7f544f08f979f8b8e677b8cd5dc790048