[clang] 0993b11 - [clang] Clear ASTContext::TUDecl in 'cleanup' for easier debugging (#191697)

Fri Apr 17 08:01:59 PDT 2026

Author: Balázs Benics
Date: 2026-04-17T16:01:43+01:00
New Revision: 0993b11a12e1eacd63ae8c84e0a5cff9e3f09ef6

URL: https://github.com/llvm/llvm-project/commit/0993b11a12e1eacd63ae8c84e0a5cff9e3f09ef6
DIFF: https://github.com/llvm/llvm-project/commit/0993b11a12e1eacd63ae8c84e0a5cff9e3f09ef6.diff

LOG: [clang] Clear ASTContext::TUDecl in 'cleanup' for easier debugging (#191697)

While the ASTContext has more things inside, I think we should at least
clear the TUDecl so that when traversing the (dangling) AST would
immediately step on the null-dereference instead of chasing dangling
pointers and crash later.

I was bitten by this in #191058.

This commit should be NFC - assuming that people didn't traverse already
dangling ASTs.

Added: 

Modified: 
    clang/include/clang/AST/ASTContext.h
    clang/lib/AST/ASTContext.cpp

Removed: 

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