Sep 01 00:03:12.115 INFO checking UnicodeSnowman/writing_an_interpreter_in_rust against master#1114ab684fbad001c4e580326d8eb4d8c4e917d3 for pr-53831
Sep 01 00:03:12.115 INFO running: cargo +1114ab684fbad001c4e580326d8eb4d8c4e917d3-alt check --frozen --all --all-targets
Sep 01 00:03:12.115 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-53831/master#1114ab684fbad001c4e580326d8eb4d8c4e917d3:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53831/worker-2/master#1114ab684fbad001c4e580326d8eb4d8c4e917d3:/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 +1114ab684fbad001c4e580326d8eb4d8c4e917d3-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 01 00:03:12.290 INFO blam! f5e872ff21dd0fd362ae43f68a981838528584258bdc34f2129316194bf1132d
Sep 01 00:03:12.292 INFO running `"docker" "start" "-a" "f5e872ff21dd0fd362ae43f68a981838528584258bdc34f2129316194bf1132d"`
Sep 01 00:03:12.963 INFO kablam!     Checking writing_an_interpreter_in_rust v0.1.0 (file:///source)
Sep 01 00:03:13.328 INFO kablam! warning: private type `(dyn ast::Statement + 'static)` in public interface (error E0446)
Sep 01 00:03:13.328 INFO kablam!   --> src/ast.rs:16:5
Sep 01 00:03:13.328 INFO kablam!    |
Sep 01 00:03:13.328 INFO kablam! 16 |     pub statements: Vec<Box<Statement>>
Sep 01 00:03:13.328 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 01 00:03:13.328 INFO kablam!    |
Sep 01 00:03:13.328 INFO kablam!    = note: #[warn(private_in_public)] on by default
Sep 01 00:03:13.329 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!
Sep 01 00:03:13.329 INFO kablam!    = note: for more information, see issue #34537 <https://github.com/rust-lang/rust/issues/34537>
Sep 01 00:03:13.329 INFO kablam! 
Sep 01 00:03:13.330 INFO kablam! warning: unused variable: `blah`
Sep 01 00:03:13.330 INFO kablam!   --> src/parser.rs:26:13
Sep 01 00:03:13.330 INFO kablam!    |
Sep 01 00:03:13.330 INFO kablam! 26 |         let blah = lexer.current_token();
Sep 01 00:03:13.330 INFO kablam!    |             ^^^^ help: consider using `_blah` instead
Sep 01 00:03:13.330 INFO kablam!    |
Sep 01 00:03:13.330 INFO kablam!    = note: #[warn(unused_variables)] on by default
Sep 01 00:03:13.330 INFO kablam! 
Sep 01 00:03:13.350 INFO kablam! error[E0502]: cannot borrow `*lexer` as mutable because it is also borrowed as immutable
Sep 01 00:03:13.350 INFO kablam!   --> src/parser.rs:37:18
Sep 01 00:03:13.350 INFO kablam!    |
Sep 01 00:03:13.350 INFO kablam! 26 |         let blah = lexer.current_token();
Sep 01 00:03:13.350 INFO kablam!    |                    ----- immutable borrow occurs here
Sep 01 00:03:13.350 INFO kablam! ...
Sep 01 00:03:13.351 INFO kablam! 37 |         Parser { lexer, current_token, peek_token, errors: Vec::new() }
Sep 01 00:03:13.351 INFO kablam!    |                  ^^^^^ mutable borrow occurs here
Sep 01 00:03:13.351 INFO kablam! 38 |     }
Sep 01 00:03:13.351 INFO kablam!    |     - immutable borrow ends here
Sep 01 00:03:13.351 INFO kablam! 
Sep 01 00:03:13.353 INFO kablam! error: aborting due to previous error
Sep 01 00:03:13.353 INFO kablam! 
Sep 01 00:03:13.353 INFO kablam! For more information about this error, try `rustc --explain E0502`.
Sep 01 00:03:13.359 INFO kablam! error: Could not compile `writing_an_interpreter_in_rust`.
Sep 01 00:03:13.359 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 01 00:03:13.428 INFO kablam! warning: private type `(dyn ast::Statement + 'static)` in public interface (error E0446)
Sep 01 00:03:13.428 INFO kablam!   --> src/ast.rs:16:5
Sep 01 00:03:13.428 INFO kablam!    |
Sep 01 00:03:13.428 INFO kablam! 16 |     pub statements: Vec<Box<Statement>>
Sep 01 00:03:13.428 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 01 00:03:13.428 INFO kablam!    |
Sep 01 00:03:13.428 INFO kablam!    = note: #[warn(private_in_public)] on by default
Sep 01 00:03:13.428 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!
Sep 01 00:03:13.428 INFO kablam!    = note: for more information, see issue #34537 <https://github.com/rust-lang/rust/issues/34537>
Sep 01 00:03:13.429 INFO kablam! 
Sep 01 00:03:13.430 INFO kablam! warning: unused variable: `blah`
Sep 01 00:03:13.430 INFO kablam!   --> src/parser.rs:26:13
Sep 01 00:03:13.430 INFO kablam!    |
Sep 01 00:03:13.430 INFO kablam! 26 |         let blah = lexer.current_token();
Sep 01 00:03:13.430 INFO kablam!    |             ^^^^ help: consider using `_blah` instead
Sep 01 00:03:13.430 INFO kablam!    |
Sep 01 00:03:13.430 INFO kablam!    = note: #[warn(unused_variables)] on by default
Sep 01 00:03:13.430 INFO kablam! 
Sep 01 00:03:13.469 INFO kablam! error[E0502]: cannot borrow `*lexer` as mutable because it is also borrowed as immutable
Sep 01 00:03:13.469 INFO kablam!   --> src/parser.rs:37:18
Sep 01 00:03:13.469 INFO kablam!    |
Sep 01 00:03:13.469 INFO kablam! 26 |         let blah = lexer.current_token();
Sep 01 00:03:13.469 INFO kablam!    |                    ----- immutable borrow occurs here
Sep 01 00:03:13.469 INFO kablam! ...
Sep 01 00:03:13.470 INFO kablam! 37 |         Parser { lexer, current_token, peek_token, errors: Vec::new() }
Sep 01 00:03:13.470 INFO kablam!    |                  ^^^^^ mutable borrow occurs here
Sep 01 00:03:13.470 INFO kablam! 38 |     }
Sep 01 00:03:13.470 INFO kablam!    |     - immutable borrow ends here
Sep 01 00:03:13.470 INFO kablam! 
Sep 01 00:03:13.477 INFO kablam! error: aborting due to previous error
Sep 01 00:03:13.478 INFO kablam! 
Sep 01 00:03:13.478 INFO kablam! For more information about this error, try `rustc --explain E0502`.
Sep 01 00:03:13.486 INFO kablam! error: Could not compile `writing_an_interpreter_in_rust`.
Sep 01 00:03:13.486 INFO kablam! 
Sep 01 00:03:13.486 INFO kablam! To learn more, run the command again with --verbose.
Sep 01 00:03:13.487 INFO kablam! su: No module specific data is present
Sep 01 00:03:14.002 INFO running `"docker" "rm" "-f" "f5e872ff21dd0fd362ae43f68a981838528584258bdc34f2129316194bf1132d"`
Sep 01 00:03:14.174 INFO blam! f5e872ff21dd0fd362ae43f68a981838528584258bdc34f2129316194bf1132d