https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81898
janus at gcc dot gnu.org changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |wrong-code Status|UNCONFIRMED |NEW Last reconfirmed| |2017-08-20 CC| |janus at gcc dot gnu.org Summary|Issue with polymorphic |[7/8 Regression] Issue with |container class |polymorphic container class Ever confirmed|0 |1 --- Comment #1 from janus at gcc dot gnu.org --- Here is a further reduced and modified version of the original test case: module AModule implicit none type :: BType end type type:: AType class(BType), allocatable :: obj type(BType), pointer :: bobj contains procedure :: a_rd end type contains subroutine a_rd(this) ! -- dummy class(AType) :: this write(*,*) 'in a_rd' end subroutine end module program main use AModule implicit none class(AType), allocatable, target :: a allocate(a) allocate(a%obj) a%bobj => a%obj write(*,*) 'calling a_rd' call a%a_rd() end It compiles and runs file with gfortran 6 and earlier, but fails with a runtime segfault with gfortran 7 and trunk. Indeed looks like a wrong-code regression.