[glibc/azanella/clang] stdio: Disable bug23-3 on clang

[Adhemerval Zanella <azanella@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=22d1746fc9356614d547d5870b55a52f54bbdcf4

commit 22d1746fc9356614d547d5870b55a52f54bbdcf4
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Thu Mar 24 15:45:46 2022 -0300

    stdio: Disable bug23-3 on clang

Diff:
---
 stdio-common/bug23-3.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/stdio-common/bug23-3.c b/stdio-common/bug23-3.c
index 57c8cef195..a716299650 100644
--- a/stdio-common/bug23-3.c
+++ b/stdio-common/bug23-3.c
@@ -5,6 +5,10 @@
 int
 do_test (void)
 {
+#ifdef __clang__
+  /* It triggers an infinite loop on clang.  */
+  return 77;
+#else
   size_t instances = 16384;
 #define X0 "\n%1$s\n" "%1$s" "%2$s" "%2$s" "%3$s" "%4$s" "%5$d" "%5$d"
   const char *item = "\na\nabbcd55";
@@ -45,6 +49,7 @@ do_test (void)
     }
   free (buf);
   return 0;
+#endif
 }
 #define TEST_FUNCTION do_test ()
 #include "../test-skeleton.c"