diff -aruN a/CFUniChar.c b/CFUniChar.c
--- a/CFUniChar.c	2019-04-18 01:51:58.631245859 +0000
+++ b/CFUniChar.c	2019-04-18 01:51:10.127293623 +0000
@@ -241,12 +241,16 @@
 
     int no_hang_fd = open("/dev/autofs_nowait", 0);
     if ((fd = open(fileName, O_RDONLY, 0)) < 0) {
+#ifndef BUILD_FEATURE_SIMULATOR
     CFLog(__kCFLogAssertion, CFSTR("%s(): could not open %s for read-only access."), __PRETTY_FUNCTION__, fileName);
+#endif
 	close(no_hang_fd);
 	return false;
     }
     if (fstat(fd, &statBuf) < 0 || (*bytes = mmap(0, statBuf.st_size, PROT_READ, MAP_PRIVATE, fd, 0)) == (void *)-1) {
+#ifndef BUILD_FEATURE_SIMULATOR
         CFLog(__kCFLogAssertion, CFSTR("%s(): could not map %s for read-only access."), __PRETTY_FUNCTION__, fileName);
+#endif
         close(fd);
         return false;
     }