gcc/cp/ChangeLog:

	PR c++/77804
	* init.c (warn_placement_new_too_small): Avoid assuming an array type
	has a constant size.

gcc/testsuite/ChangeLog:

	PR c++/77804
	* g++.dg/warn/Wplacement-new-size-4.C: New test.

From-SVN: r240754