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libstdc++/8716


As Paolo mentioned, the fix for 8347 also fixes 8716, which is a QoI
situation in the face of undefined behavior.  It also makes for a nice
testcase, since the situation for 8716 doesn't /look/ like that for 8247.

Tested x868/linux, committed to trunk.



2002-11-28  Phil Edwards  <pme@gcc.gnu.org>

	PR libstdc++/8716
	* testsuite/21_strings/ctor_copy_dtor.cc (test05):  Also test
	the NULL-pointer, zero-size case.


Index: testsuite/21_strings/ctor_copy_dtor.cc
===================================================================
RCS file: /cvs/gcc/gcc/libstdc++-v3/testsuite/21_strings/ctor_copy_dtor.cc,v
retrieving revision 1.11
diff -u -3 -p -r1.11 ctor_copy_dtor.cc
--- testsuite/21_strings/ctor_copy_dtor.cc	27 Oct 2002 07:35:06 -0000	1.11
+++ testsuite/21_strings/ctor_copy_dtor.cc	28 Nov 2002 21:27:02 -0000
@@ -222,6 +222,10 @@ void test05()
 
   std::vector<char> empty;
   std::string empty2(empty.begin(), empty.end());
+
+  // libstdc++/8716 (same underlying situation, same fix)
+  char const * s = NULL;
+  std::string zero_length_built_with_NULL(s,0);
 }
 
 int main()


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