https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105553
Jason Merrill <jason at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Summary|[11/12/13 Regression] |[11/12/13 Regression] |Deduction when attempting |[DR1640] Deduction when |to create an array with an |attempting to create an |element type that is an |array with an element type |abstract class |that is an abstract class Resolution|--- |INVALID CC| |jason at gcc dot gnu.org Status|UNCONFIRMED |RESOLVED --- Comment #1 from Jason Merrill <jason at gcc dot gnu.org> --- That wording was removed by wg21.link/p0929r2 to address wg21.link/cwg1640 , which is about this exact pattern.