https://llvm.org/bugs/show_bug.cgi?id=25294
Bug ID: 25294
Summary: Cannot jump to switch label when using blocks and ARC
Product: clang
Version: unspecified
Hardware: Macintosh
OS: MacOS X
Status: NEW
Severity: normal
Priority: P
Component: -New Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: w...@iki.fi
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
clang reports version: Apple LLVM version 7.0.0 (clang-700.1.76)
Target: x86_64-apple-darwin14.5.0
Consider the following code:
//-----------------------------------------------------------
int foo(int i)
{
NSString* str = [NSString new];
int(^func)() = nil;
switch(i)
{
case 0: func = ^{ return (int)str.length; }; break;
case 1: func = ^{ return (int)str.length; }; break;
}
return func();
}
//-----------------------------------------------------------
When compiling with ARC enabled, it gives the following error:
test.m:10:7: error: cannot jump from switch statement to this case label
case 1: func = ^{ return (int)str.length; }; break;
^
test.m:5:15: note: jump enters lifetime of block which strongly captures a
variable
NSString* str = [NSString new];
Note that these functions do not cause an error:
//-----------------------------------------------------------
int foo2(int i)
{
int value = i * 2;
int(^func)() = nil;
switch(i)
{
case 0: func = ^{ return value * 2; }; break;
case 1: func = ^{ return value * 3; }; break;
}
return func();
}
int(^foo3(int i))()
{
NSString* str = [NSString new];
switch(i)
{
case 0: return ^{ return (int)str.length; };
case 1: return ^{ return (int)str.length; };
}
return 0;
}
//-----------------------------------------------------------
--
You are receiving this mail because:
You are on the CC list for the bug.
_______________________________________________
llvm-bugs mailing list
llvm-bugs@lists.llvm.org
http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
