[INFO] updating cached repository https://github.com/Tyzzer/webdir
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/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] afe24ef91dcaaae86dd6229e41318f522ce3360f
[INFO] testing Tyzzer/webdir against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2FTyzzer%2Fwebdir" "work/builds/worker-8/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Tyzzer/webdir on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Tyzzer/webdir
[INFO] finished tweaking git repo https://github.com/Tyzzer/webdir
[INFO] tweaked toml for git repo https://github.com/Tyzzer/webdir written to work/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/Tyzzer/webdir already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] 71518f822925bead9d3b7ea7258f6a7ddd1a018344ff390eaff613e3cb3de38e
[INFO] running `"docker" "start" "-a" "71518f822925bead9d3b7ea7258f6a7ddd1a018344ff390eaff613e3cb3de38e"`
[INFO] [stderr]    Compiling memchr v2.1.3
[INFO] [stderr]    Compiling libloading v0.4.3
[INFO] [stderr]    Compiling bindgen v0.32.3
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]    Compiling slog v2.4.1
[INFO] [stderr]    Compiling spin v0.5.0
[INFO] [stderr]    Compiling serde v1.0.87
[INFO] [stderr]    Compiling literalext v0.1.1
[INFO] [stderr]    Compiling maud_htmlescape v0.17.0
[INFO] [stderr]    Compiling crossbeam v0.2.12
[INFO] [stderr]    Compiling siphasher v0.3.0
[INFO] [stderr]    Compiling if_chain v0.1.3
[INFO] [stderr]    Compiling rand_jitter v0.1.2
[INFO] [stderr]    Compiling clang-sys v0.21.2
[INFO] [stderr]    Compiling regex-syntax v0.5.6
[INFO] [stderr]    Compiling log v0.4.6
[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]    Compiling backtrace v0.3.13
[INFO] [stderr]    Compiling ring v0.14.5
[INFO] [stderr]    Compiling humanesort v0.1.0-alpha
[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] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "71518f822925bead9d3b7ea7258f6a7ddd1a018344ff390eaff613e3cb3de38e"`
[INFO] running `"docker" "rm" "-f" "71518f822925bead9d3b7ea7258f6a7ddd1a018344ff390eaff613e3cb3de38e"`
[INFO] [stdout] 71518f822925bead9d3b7ea7258f6a7ddd1a018344ff390eaff613e3cb3de38e