[LLVMbugs] [Bug 21247] New: clang-cl miscompiles calls to wsprintf
bugzilla-daemon at llvm.org
bugzilla-daemon at llvm.org
Fri Oct 10 16:58:03 PDT 2014
http://llvm.org/bugs/show_bug.cgi?id=21247
Bug ID: 21247
Summary: clang-cl miscompiles calls to wsprintf
Product: clang
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: -New Bugs
Assignee: unassignedclangbugs at nondot.org
Reporter: hans at chromium.org
CC: llvmbugs at cs.uiuc.edu
Blocks: 13707, 18887
Classification: Unclassified
Consider:
#include <stdio.h>
int main() {
wchar_t buf[1024];
swprintf(buf, 1024, L"hello %d\n", 42);
printf("%ws\n", buf);
return 0;
}
Compiled with clang-cl, the program prints garbage (debug mode) or 0
(optimized).
Note that this happens when we hit the inline definition of swprintf in
VC/include/swprinf.inl, which gets included from stdio.h.
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