libstdc++: Fix reversed args in unreachable assumption [PR109849]

libstdc++-v3/ChangeLog:

	PR libstdc++/109849
	* include/bits/vector.tcc (vector::_M_range_insert): Fix
	reversed args in length calculation.

(cherry picked from commit 6f85a97248fdff15aadc9514c1118eee0293d256)

diff --git a/libstdc++-v3/include/bits/vector.tcc b/libstdc++-v3/include/bits/vector.tcc
index 1d16735782dc4aedd375e5c12e4c751e44e41e25..0458d560075ff5e624ec4947d9a47b96c89c6796 100644 (file)
--- a/libstdc++-v3/include/bits/vector.tcc
+++ b/libstdc++-v3/include/bits/vector.tcc
@@ -1006,7 +1006,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
                const size_type __len =
                  _M_check_len(__n, "vector::_M_range_insert");
 #if __cplusplus < 201103L
-               if (__len < (__n + (__old_start - __old_finish)))
+               if (__len < (__n + (__old_finish - __old_start)))
                  __builtin_unreachable();
 #endif