Formatter panic with empty attribute inner comment #6181
Description
The following snippet causes the formatter to panic:
(#
()).aThere is not preceding node nor is the comment after the value range, since the comment is ahead of the value range, while the code was writing in the assumption that comments are either leading comments of the entire attribute expression or are after the value, not considering this odd parentheses case.
thread 'main' panicked at 'The enclosing node an attribute expression, expected to be at least after the name', crates/ruff_python_formatter/src/comments/placement.rs:934:5
stack backtrace:
0: rust_begin_unwind
at /rustc/90c541806f23a127002de5b4038be731ba1458ca/library/std/src/panicking.rs:578:5
1: core::panicking::panic_fmt
at /rustc/90c541806f23a127002de5b4038be731ba1458ca/library/core/src/panicking.rs:67:14
2: ruff_python_formatter::comments::placement::handle_attribute_comment
at ./crates/ruff_python_formatter/src/comments/placement.rs:934:5
3: ruff_python_formatter::comments::placement::place_comment
at ./crates/ruff_python_formatter/src/comments/placement.rs:53:49
4: ruff_python_formatter::comments::visitor::CommentsVisitor::start_node_impl
at ./crates/ruff_python_formatter/src/comments/visitor.rs:80:38
5: ruff_python_formatter::comments::visitor::CommentsVisitor::start_node
at ./crates/ruff_python_formatter/src/comments/visitor.rs:54:9
6: <ruff_python_formatter::comments::visitor::CommentsVisitor as ruff_python_ast::visitor::preorder::PreorderVisitor>::visit_expr
at ./crates/ruff_python_formatter/src/comments/visitor.rs:205:12
7: ruff_python_ast::visitor::preorder::walk_expr
at ./crates/ruff_python_ast/src/visitor/preorder.rs:665:13
8: <ruff_python_formatter::comments::visitor::CommentsVisitor as ruff_python_ast::visitor::preorder::PreorderVisitor>::visit_expr
at ./crates/ruff_python_formatter/src/comments/visitor.rs:206:13
9: ruff_python_ast::visitor::preorder::walk_stmt
at ./crates/ruff_python_ast/src/visitor/preorder.rs:156:15
10: <ruff_python_formatter::comments::visitor::CommentsVisitor as ruff_python_ast::visitor::preorder::PreorderVisitor>::visit_stmt
at ./crates/ruff_python_formatter/src/comments/visitor.rs:185:13
11: <ruff_python_formatter::comments::visitor::CommentsVisitor as ruff_python_ast::visitor::preorder::PreorderVisitor>::visit_body
at ./crates/ruff_python_formatter/src/comments/visitor.rs:168:23
12: ruff_python_ast::visitor::preorder::walk_module
at ./crates/ruff_python_ast/src/visitor/preorder.rs:118:13
13: <ruff_python_formatter::comments::visitor::CommentsVisitor as ruff_python_ast::visitor::preorder::PreorderVisitor>::visit_mod
at ./crates/ruff_python_formatter/src/comments/visitor.rs:158:13
14: ruff_python_formatter::comments::visitor::CommentsVisitor::visit
at ./crates/ruff_python_formatter/src/comments/visitor.rs:45:9
15: ruff_python_formatter::comments::Comments::from_ast
at ./crates/ruff_python_formatter/src/comments/mod.rs:265:13
16: ruff_python_formatter::format_node
at ./crates/ruff_python_formatter/src/lib.rs:148:20
17: ruff_python_formatter::cli::format_and_debug_print
at ./crates/ruff_python_formatter/src/cli.rs:60:21
18: ruff_python_formatter::main
at ./crates/ruff_python_formatter/src/main.rs:40:29
19: core::ops::function::FnOnce::call_once
at /rustc/90c541806f23a127002de5b4038be731ba1458ca/library/core/src/ops/function.rs:250:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.