Aug 01 20:23:26.539 INFO checking tiny-secp256k1-0.1.0 against 1.27.2+tmplazy for lazy_static-1
Aug 01 20:23:26.539 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 20:23:26.539 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 01 20:23:26.539 INFO running `"docker" "create" "-v" "/tmp/crater.K3NyOu5tPYZb:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-2/1.27.2+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 01 20:23:26.782 INFO blam! 2ebd9937a887fbcbc8ba4d415c1578d4c5f8a27172b2cc37ee97d6579c1c5570
Aug 01 20:23:26.785 INFO running `"docker" "start" "-a" "2ebd9937a887fbcbc8ba4d415c1578d4c5f8a27172b2cc37ee97d6579c1c5570"`
Aug 01 20:23:27.789 INFO kablam!     Checking tiny-secp256k1 v0.1.0 (file:///source)
Aug 01 20:23:27.789 INFO kablam!    Compiling secp256k1 v0.6.3
Aug 01 20:23:27.789 INFO kablam!     Checking serde v0.6.15
Aug 01 20:23:30.255 INFO kablam! warning: unused return value of `core::ops::Mul::mul` which must be used
Aug 01 20:23:30.255 INFO kablam!    --> src/big_num.rs:281:4
Aug 01 20:23:30.256 INFO kablam!     |
Aug 01 20:23:30.256 INFO kablam! 281 |             self.mul(rhs.words[0]);
Aug 01 20:23:30.256 INFO kablam!     |             ^^^^^^^^^^^^^^^^^^^^^^^
Aug 01 20:23:30.256 INFO kablam!     |
Aug 01 20:23:30.256 INFO kablam!     = note: #[warn(unused_must_use)] on by default
Aug 01 20:23:30.256 INFO kablam! 
Aug 01 20:23:34.992 INFO kablam!     Checking serde_json v0.6.1
Aug 01 20:23:38.011 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Aug 01 20:23:38.021 INFO kablam!  --> benches/lib.rs:1:1
Aug 01 20:23:38.021 INFO kablam!   |
Aug 01 20:23:38.021 INFO kablam! 1 | #![feature(test)]
Aug 01 20:23:38.021 INFO kablam!   | ^^^^^^^^^^^^^^^^^
Aug 01 20:23:38.021 INFO kablam! 
Aug 01 20:23:38.021 INFO kablam! error: aborting due to previous error
Aug 01 20:23:38.021 INFO kablam! 
Aug 01 20:23:38.021 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Aug 01 20:23:38.021 INFO kablam! error: Could not compile `tiny-secp256k1`.
Aug 01 20:23:38.021 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 01 20:23:38.772 INFO kablam! warning: unused return value of `core::ops::Mul::mul` which must be used
Aug 01 20:23:38.772 INFO kablam!    --> src/big_num.rs:281:4
Aug 01 20:23:38.772 INFO kablam!     |
Aug 01 20:23:38.772 INFO kablam! 281 |             self.mul(rhs.words[0]);
Aug 01 20:23:38.772 INFO kablam!     |             ^^^^^^^^^^^^^^^^^^^^^^^
Aug 01 20:23:38.773 INFO kablam!     |
Aug 01 20:23:38.773 INFO kablam!     = note: #[warn(unused_must_use)] on by default
Aug 01 20:23:38.773 INFO kablam! 
Aug 01 20:23:38.834 INFO kablam! error: build failed
Aug 01 20:23:38.836 INFO kablam! su: No module specific data is present
Aug 01 20:23:39.954 INFO running `"docker" "rm" "-f" "2ebd9937a887fbcbc8ba4d415c1578d4c5f8a27172b2cc37ee97d6579c1c5570"`
Aug 01 20:23:40.062 INFO blam! 2ebd9937a887fbcbc8ba4d415c1578d4c5f8a27172b2cc37ee97d6579c1c5570