Fix symbol table sub_table desync for non-simple annotation targets by youknowone · Pull Request #7300 · RustPython/RustPython

Non-simple annotations (subscript/attribute/parenthesized targets like
`a[0]: expr`) were scanned in the annotation scope during symbol table
analysis, creating sub_tables for any comprehensions. But codegen only
compiles simple name annotations into __annotate__, so those sub_tables
were never consumed. This caused subsequent simple annotations'
comprehension sub_tables to get the wrong index, resulting in
"the symbol 'X' must be present in the symbol table" errors.

Fix: skip entering annotation scope for non-simple annotations since
they are never compiled into __annotate__.

Fix cspell "desynchronize" warning and validate yield/await/named/async
comprehension expressions in non-simple annotations without creating
annotation scopes.

…ustPython#7300)

* Fix symbol table sub_table desync for non-simple annotation targets

Non-simple annotations (subscript/attribute/parenthesized targets like
`a[0]: expr`) were scanned in the annotation scope during symbol table
analysis, creating sub_tables for any comprehensions. But codegen only
compiles simple name annotations into __annotate__, so those sub_tables
were never consumed. This caused subsequent simple annotations'
comprehension sub_tables to get the wrong index, resulting in
"the symbol 'X' must be present in the symbol table" errors.

Fix: skip entering annotation scope for non-simple annotations since
they are never compiled into __annotate__.

* Validate forbidden expressions in non-simple annotation targets

Fix cspell "desynchronize" warning and validate yield/await/named/async
comprehension expressions in non-simple annotations without creating
annotation scopes.

* Restore in_annotation flag before propagating error