Aug 02 05:41:54.099 INFO checking lettre-0.7.0 against 1.27.2 for lazy_static-1
Aug 02 05:41:54.100 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 05:41:54.100 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 05:41:54.100 INFO running `"docker" "create" "-v" "/tmp/crater.hmSmCvmwhE2C:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-4/1.27.2:/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 05:41:54.364 INFO blam! 58b1fff52cdcf6c666a112b19dd2c55ed6ee69ed58b6b71747e909cb50f349af
Aug 02 05:41:54.366 INFO running `"docker" "start" "-a" "58b1fff52cdcf6c666a112b19dd2c55ed6ee69ed58b6b71747e909cb50f349af"`
Aug 02 05:41:55.854 INFO kablam!     Checking lettre v0.7.0 (file:///source)
Aug 02 05:42:08.542 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 02 05:42:08.542 INFO kablam!  --> benches/transport_smtp.rs:1:1
Aug 02 05:42:08.542 INFO kablam!   |
Aug 02 05:42:08.542 INFO kablam! 1 | #![feature(test)]
Aug 02 05:42:08.542 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 02 05:42:08.557 INFO kablam! 
Aug 02 05:42:08.557 INFO kablam! error: aborting due to previous error
Aug 02 05:42:08.558 INFO kablam! 
Aug 02 05:42:08.558 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 02 05:42:08.629 INFO kablam! error: Could not compile `lettre`.
Aug 02 05:42:08.629 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 02 05:42:09.485 INFO kablam! error: build failed
Aug 02 05:42:09.487 INFO kablam! su: No module specific data is present
Aug 02 05:42:10.090 INFO running `"docker" "rm" "-f" "58b1fff52cdcf6c666a112b19dd2c55ed6ee69ed58b6b71747e909cb50f349af"`
Aug 02 05:42:10.251 INFO blam! 58b1fff52cdcf6c666a112b19dd2c55ed6ee69ed58b6b71747e909cb50f349af