X-Git-Url: https://git.saurik.com/apple/libc.git/blobdiff_plain/b061a43bf32824cb214e9e3a29a974341de443d4..refs/heads/master:/stdio/FreeBSD/vfprintf.c

diff --git a/stdio/FreeBSD/vfprintf.c b/stdio/FreeBSD/vfprintf.c
index 2e707ef..cf51045 100644
--- a/stdio/FreeBSD/vfprintf.c
+++ b/stdio/FreeBSD/vfprintf.c
@@ -30,6 +30,14 @@
  * SUCH DAMAGE.
  */
 
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wint-conversion"
+
+#include <TargetConditionals.h>
+#if !TARGET_OS_DRIVERKIT
+#define OS_CRASH_ENABLE_EXPERIMENTAL_LIBTRACE 1
+#endif
+
 #if defined(LIBC_SCCS) && !defined(lint)
 static char sccsid[] = "@(#)vfprintf.c	8.1 (Berkeley) 6/4/93";
 #endif /* LIBC_SCCS and not lint */
@@ -868,7 +876,11 @@ fp_common:
 				static_format_checked = __printf_is_memory_read_only((void*)fmt0, strlen(fmt0));
 			}
 			if (!static_format_checked) {
-				os_crash("%n used in a non-immutable format string");
+#if OS_CRASH_ENABLE_EXPERIMENTAL_LIBTRACE
+				os_crash("%%n used in a non-immutable format string: %s", fmt0);
+#else
+				os_crash("%%n used in a non-immutable format string");
+#endif
 			}
 #endif // ALLOW_DYNAMIC_PERCENT_N
 
@@ -1446,4 +1458,4 @@ error:
 	return (ret < 0 || ret >= INT_MAX) ? -1 : (int)ret;
 	/* NOTREACHED */
 }
-
+#pragma clang diagnostic pop