Handle failures of CTRunGetGlyphsPtr and CTRunGetPositionsPtr

PTYTextView.m

@@ -6505,7 +6505,17 @@ static double EuclideanDistance(NSPoint p1, NSPoint p2) {
             range.location = 0;
             size_t length = CTRunGetGlyphCount(run);
             const CGGlyph *buffer = CTRunGetGlyphsPtr(run);
+            if (!buffer) {
+                NSMutableData *tempBuffer = [[[NSMutableData alloc] initWithLength:sizeof(CGGlyph) * length] autorelease];
+                CTRunGetGlyphs(run, CFRangeMake(0, length), (CGGlyph *)tempBuffer.mutableBytes);
+                buffer = tempBuffer.mutableBytes;
+            }
             const CGPoint *positions = CTRunGetPositionsPtr(run);
+            if (!positions) {
+                NSMutableData *tempBuffer = [[[NSMutableData alloc] initWithLength:sizeof(CGPoint) * length] autorelease];
+                CTRunGetPositions(run, CFRangeMake(0, length), (CGPoint *)tempBuffer.mutableBytes);
+                positions = tempBuffer.mutableBytes;
+            }
             CTFontRef runFont = CFDictionaryGetValue(CTRunGetAttributes(run), kCTFontAttributeName);
             drawGlyphsFunction(runFont, buffer, (NSPoint *)positions, length, cgContext);
             if (fakeBold) {