Aug 29 20:46:27.462 INFO checking UnicodeSnowman/writing_an_interpreter_in_rust against try#2d477f9981361618ac78253c28051a66b6cea125 for pr-53707
Aug 29 20:46:27.462 INFO running: cargo +2d477f9981361618ac78253c28051a66b6cea125-alt check --frozen --all --all-targets
Aug 29 20:46:27.463 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-0/pr-53707/try#2d477f9981361618ac78253c28051a66b6cea125:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53707/worker-0/try#2d477f9981361618ac78253c28051a66b6cea125:/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 +2d477f9981361618ac78253c28051a66b6cea125-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Aug 29 20:46:27.675 INFO blam! c32cad50a6854345f17b1a1461a9501c2d8f4df5767080010df07c0996a4f87a
Aug 29 20:46:27.677 INFO running `"docker" "start" "-a" "c32cad50a6854345f17b1a1461a9501c2d8f4df5767080010df07c0996a4f87a"`
Aug 29 20:46:28.346 INFO kablam!     Checking writing_an_interpreter_in_rust v0.1.0 (file:///source)
Aug 29 20:46:28.828 INFO kablam! warning: private type `(dyn ast::Statement + 'static)` in public interface (error E0446)
Aug 29 20:46:28.828 INFO kablam!   --> src/ast.rs:16:5
Aug 29 20:46:28.828 INFO kablam!    |
Aug 29 20:46:28.828 INFO kablam! 16 |     pub statements: Vec<Box<Statement>>
Aug 29 20:46:28.828 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Aug 29 20:46:28.839 INFO kablam!    |
Aug 29 20:46:28.839 INFO kablam!    = note: #[warn(private_in_public)] on by default
Aug 29 20:46:28.839 INFO kablam!    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
Aug 29 20:46:28.839 INFO kablam!    = note: for more information, see issue #34537 <https://github.com/rust-lang/rust/issues/34537>
Aug 29 20:46:28.839 INFO kablam! 
Aug 29 20:46:28.843 INFO kablam! warning: unused variable: `blah`
Aug 29 20:46:28.843 INFO kablam!   --> src/parser.rs:26:13
Aug 29 20:46:28.843 INFO kablam!    |
Aug 29 20:46:28.843 INFO kablam! 26 |         let blah = lexer.current_token();
Aug 29 20:46:28.843 INFO kablam!    |             ^^^^ help: consider using `_blah` instead
Aug 29 20:46:28.843 INFO kablam!    |
Aug 29 20:46:28.843 INFO kablam!    = note: #[warn(unused_variables)] on by default
Aug 29 20:46:28.843 INFO kablam! 
Aug 29 20:46:28.875 INFO kablam! error[E0502]: cannot borrow `*lexer` as mutable because it is also borrowed as immutable
Aug 29 20:46:28.875 INFO kablam!   --> src/parser.rs:37:18
Aug 29 20:46:28.875 INFO kablam!    |
Aug 29 20:46:28.876 INFO kablam! 26 |         let blah = lexer.current_token();
Aug 29 20:46:28.876 INFO kablam!    |                    ----- immutable borrow occurs here
Aug 29 20:46:28.876 INFO kablam! ...
Aug 29 20:46:28.876 INFO kablam! 37 |         Parser { lexer, current_token, peek_token, errors: Vec::new() }
Aug 29 20:46:28.876 INFO kablam!    |                  ^^^^^ mutable borrow occurs here
Aug 29 20:46:28.876 INFO kablam! 38 |     }
Aug 29 20:46:28.876 INFO kablam!    |     - immutable borrow ends here
Aug 29 20:46:28.876 INFO kablam! 
Aug 29 20:46:28.880 INFO kablam! error: aborting due to previous error
Aug 29 20:46:28.880 INFO kablam! 
Aug 29 20:46:28.880 INFO kablam! For more information about this error, try `rustc --explain E0502`.
Aug 29 20:46:28.888 INFO kablam! error: Could not compile `writing_an_interpreter_in_rust`.
Aug 29 20:46:28.888 INFO kablam! warning: build failed, waiting for other jobs to finish...
Aug 29 20:46:28.919 INFO kablam! warning: private type `(dyn ast::Statement + 'static)` in public interface (error E0446)
Aug 29 20:46:28.919 INFO kablam!   --> src/ast.rs:16:5
Aug 29 20:46:28.919 INFO kablam!    |
Aug 29 20:46:28.919 INFO kablam! 16 |     pub statements: Vec<Box<Statement>>
Aug 29 20:46:28.919 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Aug 29 20:46:28.919 INFO kablam!    |
Aug 29 20:46:28.919 INFO kablam!    = note: #[warn(private_in_public)] on by default
Aug 29 20:46:28.919 INFO kablam!    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
Aug 29 20:46:28.919 INFO kablam!    = note: for more information, see issue #34537 <https://github.com/rust-lang/rust/issues/34537>
Aug 29 20:46:28.919 INFO kablam! 
Aug 29 20:46:28.922 INFO kablam! warning: unused variable: `blah`
Aug 29 20:46:28.922 INFO kablam!   --> src/parser.rs:26:13
Aug 29 20:46:28.922 INFO kablam!    |
Aug 29 20:46:28.922 INFO kablam! 26 |         let blah = lexer.current_token();
Aug 29 20:46:28.922 INFO kablam!    |             ^^^^ help: consider using `_blah` instead
Aug 29 20:46:28.922 INFO kablam!    |
Aug 29 20:46:28.922 INFO kablam!    = note: #[warn(unused_variables)] on by default
Aug 29 20:46:28.922 INFO kablam! 
Aug 29 20:46:28.967 INFO kablam! error[E0502]: cannot borrow `*lexer` as mutable because it is also borrowed as immutable
Aug 29 20:46:28.967 INFO kablam!   --> src/parser.rs:37:18
Aug 29 20:46:28.968 INFO kablam!    |
Aug 29 20:46:28.968 INFO kablam! 26 |         let blah = lexer.current_token();
Aug 29 20:46:28.968 INFO kablam!    |                    ----- immutable borrow occurs here
Aug 29 20:46:28.968 INFO kablam! ...
Aug 29 20:46:28.968 INFO kablam! 37 |         Parser { lexer, current_token, peek_token, errors: Vec::new() }
Aug 29 20:46:28.968 INFO kablam!    |                  ^^^^^ mutable borrow occurs here
Aug 29 20:46:28.968 INFO kablam! 38 |     }
Aug 29 20:46:28.968 INFO kablam!    |     - immutable borrow ends here
Aug 29 20:46:28.968 INFO kablam! 
Aug 29 20:46:28.973 INFO kablam! error: aborting due to previous error
Aug 29 20:46:28.973 INFO kablam! 
Aug 29 20:46:28.974 INFO kablam! For more information about this error, try `rustc --explain E0502`.
Aug 29 20:46:28.981 INFO kablam! error: Could not compile `writing_an_interpreter_in_rust`.
Aug 29 20:46:28.981 INFO kablam! 
Aug 29 20:46:28.981 INFO kablam! To learn more, run the command again with --verbose.
Aug 29 20:46:28.982 INFO kablam! su: No module specific data is present
Aug 29 20:46:29.410 INFO running `"docker" "rm" "-f" "c32cad50a6854345f17b1a1461a9501c2d8f4df5767080010df07c0996a4f87a"`
Aug 29 20:46:29.522 INFO blam! c32cad50a6854345f17b1a1461a9501c2d8f4df5767080010df07c0996a4f87a