https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127384
Bug ID: 127384
Summary: SIZEOF wrong result with an unlimited polymorphic
variable holding a character value
Product: gcc
Version: 17.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: mikael at gcc dot gnu.org
Target Milestone: ---
>From the patch 9 review at [1]:
> gfc_vptr_size_get gives the vptr _size with no _len scaling, so for
> CLASS(*) holding a character the element length is the kind size, not
> the character length:
>
> character(len=7) :: c
> class(*), allocatable :: y; allocate (y, source=c)
> ! passed on to a CLASS(*) :: a(..) dummy
> sizeof(a) => 1, expected 7
[1] https://gcc.gnu.org/pipermail/fortran/2026-September/064641.html
