Sep 20 23:32:22.359 INFO checking UnicodeSnowman/writing_an_interpreter_in_rust against try#f1a3f05968ed2a674e09b6efa4ad9df90816e2b6 for pr-54394
Sep 20 23:32:22.359 INFO running: cargo +f1a3f05968ed2a674e09b6efa4ad9df90816e2b6-alt check --frozen --all --all-targets
Sep 20 23:32:22.359 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-6/pr-54394/try#f1a3f05968ed2a674e09b6efa4ad9df90816e2b6:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54394/worker-6/try#f1a3f05968ed2a674e09b6efa4ad9df90816e2b6:/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=1000" "-e" "CMD=cargo +f1a3f05968ed2a674e09b6efa4ad9df90816e2b6-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 20 23:32:22.556 INFO blam! 4436dd9ff8d2309834865a976cc4afea84c064720baa3c0664ce1a7be93d74d6
Sep 20 23:32:22.557 INFO running `"docker" "start" "-a" "4436dd9ff8d2309834865a976cc4afea84c064720baa3c0664ce1a7be93d74d6"`
Sep 20 23:32:23.639 INFO kablam! usermod: no changes
Sep 20 23:32:23.690 INFO kablam!     Checking writing_an_interpreter_in_rust v0.1.0 (/source)
Sep 20 23:32:24.010 INFO kablam! warning: private type `(dyn ast::Statement + 'static)` in public interface (error E0446)
Sep 20 23:32:24.010 INFO kablam!   --> src/ast.rs:16:5
Sep 20 23:32:24.010 INFO kablam!    |
Sep 20 23:32:24.010 INFO kablam! 16 |     pub statements: Vec<Box<Statement>>
Sep 20 23:32:24.010 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 20 23:32:24.010 INFO kablam!    |
Sep 20 23:32:24.010 INFO kablam!    = note: #[warn(private_in_public)] on by default
Sep 20 23:32:24.010 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 20 23:32:24.010 INFO kablam!    = note: for more information, see issue #34537 <https://github.com/rust-lang/rust/issues/34537>
Sep 20 23:32:24.010 INFO kablam! 
Sep 20 23:32:24.010 INFO kablam! warning: unused variable: `blah`
Sep 20 23:32:24.010 INFO kablam!   --> src/parser.rs:26:13
Sep 20 23:32:24.010 INFO kablam!    |
Sep 20 23:32:24.010 INFO kablam! 26 |         let blah = lexer.current_token();
Sep 20 23:32:24.010 INFO kablam!    |             ^^^^ help: consider using `_blah` instead
Sep 20 23:32:24.010 INFO kablam!    |
Sep 20 23:32:24.010 INFO kablam!    = note: #[warn(unused_variables)] on by default
Sep 20 23:32:24.010 INFO kablam! 
Sep 20 23:32:24.034 INFO kablam! error[E0502]: cannot borrow `*lexer` as mutable because it is also borrowed as immutable
Sep 20 23:32:24.034 INFO kablam!   --> src/parser.rs:37:18
Sep 20 23:32:24.034 INFO kablam!    |
Sep 20 23:32:24.034 INFO kablam! 26 |         let blah = lexer.current_token();
Sep 20 23:32:24.034 INFO kablam!    |                    ----- immutable borrow occurs here
Sep 20 23:32:24.034 INFO kablam! ...
Sep 20 23:32:24.034 INFO kablam! 37 |         Parser { lexer, current_token, peek_token, errors: Vec::new() }
Sep 20 23:32:24.034 INFO kablam!    |                  ^^^^^ mutable borrow occurs here
Sep 20 23:32:24.034 INFO kablam! 38 |     }
Sep 20 23:32:24.034 INFO kablam!    |     - immutable borrow ends here
Sep 20 23:32:24.034 INFO kablam! 
Sep 20 23:32:24.054 INFO kablam! error: aborting due to previous error
Sep 20 23:32:24.054 INFO kablam! 
Sep 20 23:32:24.054 INFO kablam! For more information about this error, try `rustc --explain E0502`.
Sep 20 23:32:24.078 INFO kablam! error: Could not compile `writing_an_interpreter_in_rust`.
Sep 20 23:32:24.078 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 20 23:32:24.170 INFO kablam! warning: private type `(dyn ast::Statement + 'static)` in public interface (error E0446)
Sep 20 23:32:24.171 INFO kablam!   --> src/ast.rs:16:5
Sep 20 23:32:24.171 INFO kablam!    |
Sep 20 23:32:24.171 INFO kablam! 16 |     pub statements: Vec<Box<Statement>>
Sep 20 23:32:24.171 INFO kablam!    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Sep 20 23:32:24.171 INFO kablam!    |
Sep 20 23:32:24.171 INFO kablam!    = note: #[warn(private_in_public)] on by default
Sep 20 23:32:24.171 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 20 23:32:24.171 INFO kablam!    = note: for more information, see issue #34537 <https://github.com/rust-lang/rust/issues/34537>
Sep 20 23:32:24.171 INFO kablam! 
Sep 20 23:32:24.174 INFO kablam! warning: unused variable: `blah`
Sep 20 23:32:24.174 INFO kablam!   --> src/parser.rs:26:13
Sep 20 23:32:24.174 INFO kablam!    |
Sep 20 23:32:24.174 INFO kablam! 26 |         let blah = lexer.current_token();
Sep 20 23:32:24.174 INFO kablam!    |             ^^^^ help: consider using `_blah` instead
Sep 20 23:32:24.174 INFO kablam!    |
Sep 20 23:32:24.174 INFO kablam!    = note: #[warn(unused_variables)] on by default
Sep 20 23:32:24.174 INFO kablam! 
Sep 20 23:32:24.187 INFO kablam! error[E0502]: cannot borrow `*lexer` as mutable because it is also borrowed as immutable
Sep 20 23:32:24.187 INFO kablam!   --> src/parser.rs:37:18
Sep 20 23:32:24.187 INFO kablam!    |
Sep 20 23:32:24.187 INFO kablam! 26 |         let blah = lexer.current_token();
Sep 20 23:32:24.190 INFO kablam!    |                    ----- immutable borrow occurs here
Sep 20 23:32:24.190 INFO kablam! ...
Sep 20 23:32:24.190 INFO kablam! 37 |         Parser { lexer, current_token, peek_token, errors: Vec::new() }
Sep 20 23:32:24.190 INFO kablam!    |                  ^^^^^ mutable borrow occurs here
Sep 20 23:32:24.190 INFO kablam! 38 |     }
Sep 20 23:32:24.190 INFO kablam!    |     - immutable borrow ends here
Sep 20 23:32:24.190 INFO kablam! 
Sep 20 23:32:24.194 INFO kablam! error: aborting due to previous error
Sep 20 23:32:24.194 INFO kablam! 
Sep 20 23:32:24.194 INFO kablam! For more information about this error, try `rustc --explain E0502`.
Sep 20 23:32:24.199 INFO kablam! error: Could not compile `writing_an_interpreter_in_rust`.
Sep 20 23:32:24.199 INFO kablam! 
Sep 20 23:32:24.199 INFO kablam! To learn more, run the command again with --verbose.
Sep 20 23:32:24.200 INFO kablam! su: No module specific data is present
Sep 20 23:32:25.341 INFO running `"docker" "rm" "-f" "4436dd9ff8d2309834865a976cc4afea84c064720baa3c0664ce1a7be93d74d6"`
Sep 20 23:32:25.451 INFO blam! 4436dd9ff8d2309834865a976cc4afea84c064720baa3c0664ce1a7be93d74d6