https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69867
--- Comment #2 from Gerhard Steinmetz <gerhard.steinmetz.fort...@t-online.de> --- One exception from comment 1 : $ cat z7.f90 program p type t character(1) :: b = null() character(1) :: c(1) = null() end type end $ gfortran-6 z7.f90 f951: internal compiler error: Segmentation fault