Index: htdocs/bugs/index.html
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RCS file: /cvs/gcc/wwwdocs/htdocs/bugs/index.html,v
retrieving revision 1.116
diff -u -r1.116 index.html
--- htdocs/bugs/index.html	5 Jul 2014 21:52:32 -0000	1.116
+++ htdocs/bugs/index.html	6 Oct 2015 11:15:04 -0000
@@ -50,7 +50,9 @@
 with <code>gcc -Wall -Wextra</code> and see whether this shows anything
 wrong with your code.  Similarly, if compiling with
 <code>-fno-strict-aliasing -fwrapv -fno-aggressive-loop-optimizations</code>
-makes a difference, your code probably is not correct.</p>
+makes a difference, or if compiling with <code>-fsanitize=undefined</code>
+produces any run-time errors, then your code is probably not correct.
+</p>
 
 <h2>Summarized bug reporting instructions</h2>