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Jonathan Wakely ace857f95d PR libstdc++/89446 fix null pointer dereference in char_traits 
PR libstdc++/89446
	* include/bits/char_traits.h (__constant_char_array): Check index is
	in range before dereferencing.
	(char_traits<char>::compare, char_traits<char>::find)
	(char_traits<char8_t>::compare, char_traits<char8_t>::find): Return
	immediately if n is zero.
	(char_traits<wchar_t>::compare, char_traits<wchar_t>::find): Likewise.
	Remove workarounds for PR 67026.
	* testsuite/21_strings/basic_string_view/operators/char/89446.cc:
	New test.
	* testsuite/21_strings/basic_string_view/operators/wchar_t/89446.cc:
	New test.

From-SVN: r269148
 		2019-02-23 03:01:59 +00:00
..
char PR libstdc++/89446 fix null pointer dereference in char_traits 2019-02-23 03:01:59 +00:00
wchar_t PR libstdc++/89446 fix null pointer dereference in char_traits 2019-02-23 03:01:59 +00:00