Index: common/lib/libc/misc/ubsan.c
===================================================================
RCS file: /cvsroot/src/common/lib/libc/misc/ubsan.c,v
retrieving revision 1.6
diff -p -u -r1.6 ubsan.c
--- common/lib/libc/misc/ubsan.c	17 Jun 2019 18:55:37 -0000	1.6
+++ common/lib/libc/misc/ubsan.c	4 Oct 2019 09:08:04 -0000
@@ -1391,9 +1391,10 @@ DeserializeFloatOverPointer(char *pBuffe
 static void
 DeserializeFloatInlined(char *pBuffer, size_t zBUfferLength, struct CTypeDescriptor *pType, unsigned long ulNumber)
 {
-	float F;
-	double D;
+	float F = 0;
+	double D = 0;
 	uint32_t U32;
+	size_t copyLen;
 
 	ASSERT(pBuffer);
 	ASSERT(zBUfferLength > 0);
@@ -1403,7 +1404,11 @@ DeserializeFloatInlined(char *pBuffer, s
 
 	switch (zDeserializeTypeWidth(pType)) {
 	case WIDTH_64:
-		memcpy(&D, &ulNumber, sizeof(double));
+		if (sizeof(double) >= sizeof(unsigned long))
+			copyLen = sizeof ulNumber;
+		else
+			copyLen = sizeof D;
+		memcpy(&D, &ulNumber, copyLen);
 		snprintf(pBuffer, zBUfferLength, "%g", D);
 		break;
 	case WIDTH_32: