https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86100
anlauf at gcc dot gnu.org changed:
What |Removed |Added
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CC| |anlauf at gcc dot gnu.org
--- Comment #2 from anlauf at gcc dot gnu.org ---
The problem seems to generally occur for class components of derived types.
program p
implicit none
type t
integer :: i = 0
end type t
type any_matrix
class(t), allocatable :: m(:,:)
end type any_matrix
type(any_matrix) :: a, b
allocate(a%m(3,4))
call foo ()
contains
subroutine foo ()
b = a ! Array bound mismatch for dimension 1 of array '<<unknown>>'
(12/3)
!b%m = a%m ! no runtime error with -fcheck=bounds
end subroutine foo
end
This fails as indicated.
Note that 12=3*4 is the total size of the array, and 3 is the size of the
first dimension, which - along with the '<<unknown>>' - points to
gfc_copy_class_to_class:
from_len = gfc_conv_descriptor_size (from_data, 1);
from_len = fold_convert (TREE_TYPE (orig_nelems), from_len);
tmp = fold_build2_loc (input_location, NE_EXPR,
logical_type_node, from_len, orig_nelems);
msg = xasprintf ("Array bound mismatch for dimension %d "
"of array '%s' (%%ld/%%ld)",
1, name);
gfc_trans_runtime_check (true, false, tmp, &body,
&gfc_current_locus, msg,
fold_convert (long_integer_type_node,
orig_nelems),
fold_convert (long_integer_type_node,
from_len));
So we compare dimension 1 and the full size of the rhs?
Shouldn't we compare lhs and rhs shapes?
