X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/cf6bedce0ee2453abe58437cdea45b8ff16f4d01..57c26f8210c40317d70d616a05198e042ee9175b:/src/common/string.cpp

diff --git a/src/common/string.cpp b/src/common/string.cpp
index f42bd4dfd4..07a532d180 100644
--- a/src/common/string.cpp
+++ b/src/common/string.cpp
@@ -1727,7 +1727,12 @@ int wxString::PrintfV(const wxChar* pszFormat, va_list argptr)
                 return -1;
             }
 
-            len = wxVsnprintf(buf, size, pszFormat, argptr);
+            // wxVsnprintf() may modify the original arg pointer, so pass it
+            // only a copy
+            va_list argptrcopy;
+            wxVaCopy(argptrcopy, argptr);
+            len = wxVsnprintf(buf, size, pszFormat, argptrcopy);
+            va_end(argptrcopy);
 
             // some implementations of vsnprintf() don't NUL terminate
             // the string if there is not enough space for it so