Fuck the industry domination of C++ and its standard not forcing compliance in both C and C++ modes, if this is the case here. If not, then fuck MSVC.

common/errors.c

@@ -30,7 +30,7 @@ void uiprivInternalError(const char *fmt, ...)
 }
 
 static const char *messages[uiprivNumProgrammerErrors] = {
-	[uiprivProgrammerErrorWrongStructSize] = "wrong size %zu for %s",
+	[uiprivProgrammerErrorWrongStructSize] = "wrong size %" uiprivSizetPrintf " for %s",
 	[uiprivProgrammerErrorIndexOutOfRange] = "index %d out of range in %s()",
 	[uiprivProgrammerErrorNullPointer] = "invalid null pointer for %s passed into %s()",
 	[uiprivProgrammerErrorIntIDNotFound] = "%s identifier %d not found in %s()",

common/uipriv.h

@@ -11,6 +11,13 @@ extern "C" {
 #define uiprivFunc __func__
 #endif
 
+// TODO WHY IS THIS NEEDED?!?!?!?!!?!??!Q https://stackoverflow.com/questions/15610053/correct-printf-format-specifier-for-size-t-zu-or-iu SAYS THAT VS2013 DOES SUPPORT %zu
+#ifdef _MSC_VER
+#define uiprivSizetPrintf "Iu"
+#else
+#define uiprivSizetPrintf "zu"
+#endif
+
 // init.c
 extern const char **uiprivSysInitErrors(void);
 extern int uiprivSysInit(void *options, uiInitError *err);