[Webkit-unassigned] [Bug 140917] Windows return -1 when calling vsnprintf with arguments that exceed target buffer size

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=140917

--- Comment #7 from Namhoon Kim <nakim at ea.com> ---
> Looking over this file, it seems like our 'snprintf' (a few lines above) suffers from the exact same problem. Could you please make the same correction there? Then we can land the patch in one go.

I fixed it too. Correcting handled before va_end calling. See below hunk please.

 inline int snprintf(char* buffer, size_t count, const char* format, ...) 
 {
     int result;
     va_list args;
     va_start(args, format);
     result = _vsnprintf(buffer, count, format, args);
+    if (result < 0 && errno != EINVAL)
+        result = _vscprintf(format, args);
     va_end(args);

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