Dec 03 12:31:19.283 INFO testing exar-client-0.1.0 against 1.30.1 for beta-1.31-5
Dec 03 12:31:19.283 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-5/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/beta-1.31-5/1.30.1:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +1.30.1 build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 03 12:31:19.559 INFO [stdout] f0dca97fa671c0c7ac1eba26e09c4b937d50c37567ee5bd95945b807fd97cc1b
Dec 03 12:31:19.564 INFO running `"docker" "start" "-a" "f0dca97fa671c0c7ac1eba26e09c4b937d50c37567ee5bd95945b807fd97cc1b"`
Dec 03 12:31:20.207 INFO [stderr] usermod: no changes
Dec 03 12:31:20.283 INFO [stderr]    Compiling exar-client v0.1.0 (/source)
Dec 03 12:31:21.965 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.73s
Dec 03 12:31:21.968 INFO [stderr] su: No module specific data is present
Dec 03 12:31:23.511 INFO running `"docker" "inspect" "f0dca97fa671c0c7ac1eba26e09c4b937d50c37567ee5bd95945b807fd97cc1b"`
Dec 03 12:31:23.833 INFO running `"docker" "rm" "-f" "f0dca97fa671c0c7ac1eba26e09c4b937d50c37567ee5bd95945b807fd97cc1b"`
Dec 03 12:31:24.159 INFO [stdout] f0dca97fa671c0c7ac1eba26e09c4b937d50c37567ee5bd95945b807fd97cc1b
Dec 03 12:31:24.164 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-5/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/beta-1.31-5/1.30.1:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +1.30.1 test --frozen --no-run" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 03 12:31:24.872 INFO [stdout] 176fb7bb6721f70521de104d9ca9819a325b5ca2889de3b6233aeae6f7a5ad45
Dec 03 12:31:24.875 INFO running `"docker" "start" "-a" "176fb7bb6721f70521de104d9ca9819a325b5ca2889de3b6233aeae6f7a5ad45"`
Dec 03 12:31:25.939 INFO [stderr] usermod: no changes
Dec 03 12:31:25.993 INFO [stderr]    Compiling exar-testkit v0.1.0
Dec 03 12:31:26.687 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 03 12:31:26.687 INFO [stderr]  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/exar-testkit-0.1.0/src/lib.rs:1:1
Dec 03 12:31:26.687 INFO [stderr]   |
Dec 03 12:31:26.687 INFO [stderr] 1 | #![feature(const_fn)]
Dec 03 12:31:26.687 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
Dec 03 12:31:26.687 INFO [stderr] 
Dec 03 12:31:26.687 INFO [stderr] error: aborting due to previous error
Dec 03 12:31:26.687 INFO [stderr] 
Dec 03 12:31:26.687 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 03 12:31:26.697 INFO [stderr] error: Could not compile `exar-testkit`.
Dec 03 12:31:26.697 INFO [stderr] 
Dec 03 12:31:26.697 INFO [stderr] To learn more, run the command again with --verbose.
Dec 03 12:31:26.697 INFO [stderr] su: No module specific data is present
Dec 03 12:31:27.012 INFO running `"docker" "inspect" "176fb7bb6721f70521de104d9ca9819a325b5ca2889de3b6233aeae6f7a5ad45"`
Dec 03 12:31:27.213 INFO running `"docker" "rm" "-f" "176fb7bb6721f70521de104d9ca9819a325b5ca2889de3b6233aeae6f7a5ad45"`
Dec 03 12:31:27.462 INFO [stdout] 176fb7bb6721f70521de104d9ca9819a325b5ca2889de3b6233aeae6f7a5ad45