signature_help: Fix crash when typing CJK in debug mode (#45785)
in release mode: found many log error as `ERROR [rope::chunk] byte index
48 is not a char boundary; it is inside '，' (bytes 46..49)`
This is easy testing,
- enable signature help
- typing any CJK character
- crash in debug mode
Release Notes:
- N/A
44b6995ac6CharlesChen0823 committed on 1/6/2026, 4:28:27 PM· committed by GitHubparent4f59ec0