http://llvm.org/bugs/show_bug.cgi?id=9056
Summary: -Wuninitialized false positive with foreach objc
construct.
Product: clang
Version: trunk
Platform: All
OS/Version: All
Status: NEW
Severity: normal
Priority: P
Component: Frontend
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Created an attachment (id=6051)
--> (http://llvm.org/bugs/attachment.cgi?id=6051)
Test case
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.
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