http://llvm.org/bugs/show_bug.cgi?id=7789
Summary: Failure to detect "jump to case label crosses
initialization"
Product: clang
Version: trunk
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P
Component: C++
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected], [email protected]
Created an attachment (id=5308)
--> (http://llvm.org/bugs/attachment.cgi?id=5308)
source code to reproduce bug
Hi!
When compiling a 'switch' in which a 'case' contains an initialized variable
(see example) Clang does so without complaining. g++ on the other hand produces
an error "jump to case label crosses initialization".
I'm not really sure which is correct. According to this thread
(http://www.velocityreviews.com/forums/t282021-error-jump-to-case-label.html)
and the explanation for it's behavior, g++ is correct.
[code]
switch (a) {
//...
case 1:
int a = 1;
break;
case 2:
//...
}
[/code]
g++ output for attached file:
> clang-bug.cpp: In function ‘int main()’:
> clang-bug.cpp:10: error: jump to case label
> clang-bug.cpp:7: error: crosses initialization of ‘int a’
clang++ output for attached file:
-
(compiles without error/warning)
My system:
Linux VirtUbuntu 2.6.32-24-generic #38-Ubuntu SMP Mon Jul 5 09:22:14 UTC 2010
i686 GNU/Linux
clang version 2.8 (trunk 109579)
Target: i386-pc-linux-gnu
Thread model: posix
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