diff options
Diffstat (limited to 'libstdc++-v3/include/ext/rc_string.h')
| -rw-r--r-- | libstdc++-v3/include/ext/rc_string.h | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/libstdc++-v3/include/ext/rc_string.h b/libstdc++-v3/include/ext/rc_string.h index 0ece46583c3..7857330eacf 100644 --- a/libstdc++-v3/include/ext/rc_string.h +++ b/libstdc++-v3/include/ext/rc_string.h @@ -618,10 +618,17 @@ namespace __gnu_cxx __rc_string<_CharT, _Traits, _Alloc>:: _M_reserve(size_type __res) { - const allocator_type __a = _M_get_allocator(); - _CharT* __tmp = _M_rep()->_M_clone(__a, __res - _M_length()); - _M_dispose(__a); - _M_data(__tmp); + if (__res != _M_capacity() || _M_is_shared()) + { + // Make sure we don't shrink below the current size. + if (__res < _M_length()) + __res = _M_length(); + + const allocator_type __a = _M_get_allocator(); + _CharT* __tmp = _M_rep()->_M_clone(__a, __res - _M_length()); + _M_dispose(__a); + _M_data(__tmp); + } } template<typename _CharT, typename _Traits, typename _Alloc> |