diff --git a/lib/ugui.c3l/src/ugui_font.c3 b/lib/ugui.c3l/src/ugui_font.c3
index d481dbd..9ababd4 100644
--- a/lib/ugui.c3l/src/ugui_font.c3
+++ b/lib/ugui.c3l/src/ugui_font.c3
@@ -112,10 +112,11 @@ fn void? Font.load(&font, String name, ZString path, uint height, float scale)
 	ushort size = (ushort)font.size*(ushort)($$sqrt((float)FONT_CACHED));
 	font.atlas.new(font.id, ATLAS_GRAYSCALE, size, size)!;
 
-	// preallocate the ASCII range
-	for (char c = ' '; c < '~'; c++) {
-		font.get_glyph((Codepoint)c)!;
-	}
+// FIXME: this crashes with O1 or greater, why??
+//	// preallocate the ASCII range
+//	for (char c = ' '; c < '~'; c++) {
+//		font.get_glyph((Codepoint)c)!;
+//	}
 }
 
 fn Glyph*? Font.get_glyph(&font, Codepoint code)