Dear all,
I finally figured out that the array dimensions simply need to be
large enough to get invalid memory accesses that actual lead to a
crash.
I will commit the following testcase along with the fix to libfortran:
! { dg-do run }
! PR libfortran/99218 - matmul on temporary array accesses invalid memory
program p
implicit none
integer, parameter :: nState = 300000
integer, parameter :: nCon = 1
real, parameter :: ZERO = 0.0
real :: G(nCon,nState) = ZERO
real :: H(nState,nCon) = ZERO
real :: lambda(nCon) = ZERO
real :: f(nState) = ZERO
f = matmul (transpose (G), lambda)
if (f(1) /= ZERO) stop 1
end program
Cheers,
Harald
