diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/StringUtils.cpp | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/StringUtils.cpp b/src/StringUtils.cpp index 0b38297ef..2dcd9fec9 100644 --- a/src/StringUtils.cpp +++ b/src/StringUtils.cpp @@ -28,6 +28,10 @@ AString & AppendVPrintf(AString & str, const char *format, va_list args) // MS CRT provides secure printf that doesn't behave like in the C99 standard if ((len = _vsnprintf_s(buffer, ARRAYCOUNT(buffer), _TRUNCATE, format, args)) != -1) #else // _MSC_VER + // We need to store a copy of the args, because on AMD64 in GCC the vsnprintf() is allowed to make changes to it (WTF?) + // Ref.: issue #541, http://www.bailopan.net/blog/?p=30 + va_list args2; + va_copy(args2, args); if ((len = vsnprintf(buffer, ARRAYCOUNT(buffer), format, args)) < ARRAYCOUNT(buffer)) #endif // else _MSC_VER { @@ -51,7 +55,7 @@ AString & AppendVPrintf(AString & str, const char *format, va_list args) #ifdef _MSC_VER vsprintf_s((char *)&(Buffer.front()), Buffer.size(), format, args); #else // _MSC_VER - vsnprintf((char *)&(Buffer.front()), Buffer.size(), format, args); + vsnprintf((char *)&(Buffer.front()), Buffer.size(), format, args2); #endif // else _MSC_VER str.append(&(Buffer.front()), Buffer.size() - 1); return str; |