Aug 02 07:31:48.002 INFO checking gtrie-0.4.0 against 1.27.2+tmplazy for lazy_static-1
Aug 02 07:31:48.002 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 07:31:48.002 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 07:31:48.002 INFO running `"docker" "create" "-v" "/tmp/crater.0PfpYAh3xrwu:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-6/1.27.2+tmplazy:/target:rw,Z" "-v" "/home/ec2-user/crater/./work/local/cargo-home:/cargo-home:ro,Z" "-v" "/home/ec2-user/crater/./work/local/rustup-home:/rustup-home:ro,Z" "-v" "/home/ec2-user/crater/./work/local/cargo-home/git:/cargo-home/git:rw,Z" "-e" "USER_ID=500" "-e" "CMD=cargo +1.27.2 check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "crater"`
Aug 02 07:31:48.268 INFO blam! d0190bd5905717c1753e2625ab6485a53139f7260c8899b08bae470ec6fd1e78
Aug 02 07:31:48.270 INFO running `"docker" "start" "-a" "d0190bd5905717c1753e2625ab6485a53139f7260c8899b08bae470ec6fd1e78"`
Aug 02 07:31:49.862 INFO kablam!     Checking gtrie v0.4.0 (file:///source)
Aug 02 07:31:50.557 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 07:31:50.557 INFO kablam!  --> benches/basic_benchmark.rs:1:1
Aug 02 07:31:50.558 INFO kablam!   |
Aug 02 07:31:50.558 INFO kablam! 1 | #![feature(test)]
Aug 02 07:31:50.558 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 07:31:50.558 INFO kablam! 
Aug 02 07:31:50.558 INFO kablam! error: aborting due to previous error
Aug 02 07:31:50.558 INFO kablam! 
Aug 02 07:31:50.559 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 07:31:50.568 INFO kablam! error: Could not compile `gtrie`.
Aug 02 07:31:50.568 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 07:31:50.707 INFO kablam! error: build failed
Aug 02 07:31:50.708 INFO kablam! su: No module specific data is present
Aug 02 07:31:51.256 INFO running `"docker" "rm" "-f" "d0190bd5905717c1753e2625ab6485a53139f7260c8899b08bae470ec6fd1e78"`
Aug 02 07:31:51.367 INFO blam! d0190bd5905717c1753e2625ab6485a53139f7260c8899b08bae470ec6fd1e78