https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67740
Sebastien Bardeau <bardeau at iram dot fr> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |bardeau at iram dot fr --- Comment #4 from Sebastien Bardeau <bardeau at iram dot fr> --- I have pretty much the same kind of issue with gfortran 10.2.0 and 11.0.1 (20210426). The following code shows invalid results (printed lengths are 0). Sometimes I even get a program crash. If the 'data1' component is a standalone pointer (i.e. out of the derived type), I have no issue then. program test2 character(len=10), target, allocatable :: s(:) type :: pointer_typec0_t character(len=:), pointer :: data1(:) end type pointer_typec0_t type(pointer_typec0_t) :: co ! allocate(s(3)) s(1) = '1234567890' s(2) = 'qwertyuio ' s(3) = 'asdfghjk ' ! co%data1 => s ! print *,len(co%data1(1)),len_trim(co%data1(1)),co%data1(1) print *,len(co%data1(2)),len_trim(co%data1(2)),co%data1(2) print *,len(co%data1(3)),len_trim(co%data1(3)),co%data1(3) end program test2