[INFO] updating cached repository Multimo/rusty-chat-tute
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Multimo/rusty-chat-tute
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Multimo/rusty-chat-tute" "work/ex/beta-1.38-1/sources/1.37.0/gh/Multimo/rusty-chat-tute"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Multimo/rusty-chat-tute'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Multimo/rusty-chat-tute" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Multimo/rusty-chat-tute"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Multimo/rusty-chat-tute'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7b975b49e350895861a87b47175ee6e3dbef6ca2
[INFO] sha for GitHub repo Multimo/rusty-chat-tute: 7b975b49e350895861a87b47175ee6e3dbef6ca2
[INFO] validating manifest of Multimo/rusty-chat-tute on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Multimo/rusty-chat-tute on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Multimo/rusty-chat-tute
[INFO] finished frobbing Multimo/rusty-chat-tute
[INFO] frobbed toml for Multimo/rusty-chat-tute written to work/ex/beta-1.38-1/sources/1.37.0/gh/Multimo/rusty-chat-tute/Cargo.toml
[INFO] started frobbing Multimo/rusty-chat-tute
[INFO] finished frobbing Multimo/rusty-chat-tute
[INFO] frobbed toml for Multimo/rusty-chat-tute written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Multimo/rusty-chat-tute/Cargo.toml
[INFO] crate Multimo/rusty-chat-tute already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing Multimo/rusty-chat-tute against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Multimo/rusty-chat-tute:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 4d8e2d8140a85c8df4ddf65369f22d114515fadf8bc1e38d4568bc4bd18a8c12
[INFO] running `"docker" "start" "-a" "4d8e2d8140a85c8df4ddf65369f22d114515fadf8bc1e38d4568bc4bd18a8c12"`
[INFO] [stderr]    Compiling regex v0.2.9
[INFO] [stderr]    Compiling md5 v0.3.7
[INFO] [stderr]    Compiling fallible-iterator v0.1.4
[INFO] [stderr]    Compiling literalext v0.1.1
[INFO] [stderr]    Compiling termcolor v0.3.5
[INFO] [stderr]    Compiling serde v1.0.35
[INFO] [stderr]    Compiling socket2 v0.3.4
[INFO] [stderr]    Compiling regex-syntax v0.5.2
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]   --> /opt/crater/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] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "4d8e2d8140a85c8df4ddf65369f22d114515fadf8bc1e38d4568bc4bd18a8c12"`
[INFO] running `"docker" "rm" "-f" "4d8e2d8140a85c8df4ddf65369f22d114515fadf8bc1e38d4568bc4bd18a8c12"`
[INFO] [stdout] 4d8e2d8140a85c8df4ddf65369f22d114515fadf8bc1e38d4568bc4bd18a8c12