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libstdc++: Fix -Wmaybe-uninitialized false positive [PR103984]

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This fixes a false positive warning seen with LTO:

12/bits/regex_compiler.tcc:443:32: error: '__last_char._M_char' may be used uninitialized [-Werror=maybe-uninitialized]

Given that the std::regex code is not very efficient anyway, the
overhead of initializing this byte should be minimal.

libstdc++-v3/ChangeLog:

	PR middle-end/103984
	* include/bits/regex_compiler.h (_BracketMatcher::_M_char): Use
	default member initializer.
This commit is contained in:
Jonathan Wakely 2022-03-01 09:33:21 +00:00
parent 16ced9c654
commit ad66b03b3c
1 changed files with 1 additions and 1 deletions
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libstdc++-v3/include/bits/regex_compiler.h
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@ -125,7 +125,7 @@ namespace __detail
struct _BracketState
{
enum class _Type : char { _None, _Char, _Class } _M_type = _Type::_None;
_CharT _M_char;
_CharT _M_char = _CharT();
void
set(_CharT __c) noexcept { _M_type = _Type::_Char; _M_char = __c; }