Sep 01 23:04:15.594 INFO checking derivative-1.0.0 against try#aa245a5862056b681d2ccdb178f58891108cd3a6 for pr-53831
Sep 01 23:04:15.594 INFO running: cargo +aa245a5862056b681d2ccdb178f58891108cd3a6-alt check --frozen --all --all-targets
Sep 01 23:04:15.594 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-1/pr-53831/try#aa245a5862056b681d2ccdb178f58891108cd3a6:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53831/worker-1/try#aa245a5862056b681d2ccdb178f58891108cd3a6:/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" "-e" "USER_ID=500" "-e" "CMD=cargo +aa245a5862056b681d2ccdb178f58891108cd3a6-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 01 23:04:15.786 INFO blam! 060b001f9cca09ecf4f401ff5be484f9c58896d82d831dd83d61706ed18ede6c
Sep 01 23:04:15.788 INFO running `"docker" "start" "-a" "060b001f9cca09ecf4f401ff5be484f9c58896d82d831dd83d61706ed18ede6c"`
Sep 01 23:04:16.563 INFO kablam!     Checking syn v0.10.8
Sep 01 23:04:16.563 INFO kablam!     Checking itertools v0.5.10
Sep 01 23:04:16.565 INFO kablam!    Compiling derivative v1.0.0 (file:///source)
Sep 01 23:04:47.045 INFO kablam! error[E0277]: the size for values of type `[u8]` cannot be known at compilation time
Sep 01 23:04:47.045 INFO kablam!   --> tests/rustc-issue-25394.rs:18:24
Sep 01 23:04:47.045 INFO kablam!    |
Sep 01 23:04:47.045 INFO kablam! 18 | fn use_row(_: Row<u8>) {}
Sep 01 23:04:47.045 INFO kablam!    |                        ^ doesn't have a size known at compile-time
Sep 01 23:04:47.045 INFO kablam!    |
Sep 01 23:04:47.045 INFO kablam!    = help: within `Row<u8>`, the trait `std::marker::Sized` is not implemented for `[u8]`
Sep 01 23:04:47.045 INFO kablam!    = note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
Sep 01 23:04:47.045 INFO kablam!    = note: required because it appears within the type `Row<u8>`
Sep 01 23:04:47.045 INFO kablam!    = note: all function arguments must have a statically known size
Sep 01 23:04:47.045 INFO kablam!    = help: unsized locals are gated as an unstable feature
Sep 01 23:04:47.045 INFO kablam! 
Sep 01 23:04:47.049 INFO kablam! error: aborting due to previous error
Sep 01 23:04:47.056 INFO kablam! 
Sep 01 23:04:47.056 INFO kablam! For more information about this error, try `rustc --explain E0277`.
Sep 01 23:04:47.073 INFO kablam! error: Could not compile `derivative`.
Sep 01 23:04:47.073 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 01 23:04:48.015 INFO kablam! warning: unused comparison which must be used
Sep 01 23:04:48.016 INFO kablam!   --> tests/rustc-deriving-meta.rs:31:5
Sep 01 23:04:48.016 INFO kablam!    |
Sep 01 23:04:48.016 INFO kablam! 31 |     a == a;    // check for PartialEq impl w/o testing its correctness
Sep 01 23:04:48.016 INFO kablam!    |     ^^^^^^
Sep 01 23:04:48.016 INFO kablam!    |
Sep 01 23:04:48.016 INFO kablam!    = note: #[warn(unused_must_use)] on by default
Sep 01 23:04:48.016 INFO kablam! 
Sep 01 23:04:48.029 INFO kablam! warning: unused return value of `std::clone::Clone::clone` which must be used
Sep 01 23:04:48.029 INFO kablam!   --> tests/rustc-deriving-meta.rs:32:5
Sep 01 23:04:48.029 INFO kablam!    |
Sep 01 23:04:48.029 INFO kablam! 32 |     a.clone(); // check for Clone impl w/o testing its correctness
Sep 01 23:04:48.029 INFO kablam!    |     ^^^^^^^^^^
Sep 01 23:04:48.029 INFO kablam!    |
Sep 01 23:04:48.029 INFO kablam!    = note: cloning is often expensive and is not expected to have side effects
Sep 01 23:04:48.029 INFO kablam! 
Sep 01 23:04:49.110 INFO kablam! error: build failed
Sep 01 23:04:49.113 INFO kablam! su: No module specific data is present
Sep 01 23:04:50.034 INFO running `"docker" "rm" "-f" "060b001f9cca09ecf4f401ff5be484f9c58896d82d831dd83d61706ed18ede6c"`
Sep 01 23:04:50.154 INFO blam! 060b001f9cca09ecf4f401ff5be484f9c58896d82d831dd83d61706ed18ede6c