https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115781
--- Comment #2 from anlauf at gcc dot gnu.org ---
Interesting observation: replacing
call use_mats(mats)
by
call use_mats(mats(lbound(mats,1):))
leads to apparently correct output:
top level: mats, lbound= 2, ubound= 4
top level, 2: nRows= 2
top level, 3: nRows= 3
top level, 4: nRows= 4
in use_mats: mats, lbound= 1, ubound= 3
use_mats, 1: nRows= 2
use_mats, 2: nRows= 3
use_mats, 3: nRows= 4
