-Wuninitialized false positive with foreach objc construct.

[llvmbot]

Bugzilla Link	9056
Resolution	FIXED
Resolved on	Jan 26, 2011 20:02
Version	trunk
OS	All
Attachments	Test case
Reporter	LLVM Bugzilla Contributor
CC	@tkremenek,@nico

Extended Description

The recent merge of -Wuninitialized-experimental with -Wuninitialized introduces a very annoying false positive.

When using the "for in" objc syntax, clang emits a warning.

------------ foreach.m
void test() {
id collection = 0;
for (id obj in collection) {
if (0 == obj)
break;
}
}

clang -fsyntax-only -Wuninitialized foreach.m
foreach.m:4:8: warning: use of uninitialized variable 'obj' [-Wuninitialized]
for (id obj in collection) {
^~~~~~
foreach.m:5:11: note: variable 'obj' is possibly uninitialized when used here
if (0 == obj)
^~~
foreach.m:4:14: note: add initialization to silence this warning
for (id obj in collection) {
^
= 0
1 warning generated.

[tkremenek]

cloned to rdar://problem/8921260

[tkremenek]

*** Bug llvm/llvm-bugzilla-archive#9064 has been marked as a duplicate of this bug. ***

[tkremenek]

Fixed: r124347

[tkremenek]

mentioned in issue llvm/llvm-bugzilla-archive#9064