https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103716
--- Comment #3 from G. Steinmetz <gs...@t-online.de> --- On my environment(s) the history for r9 is as follows : <= 20181028 : Error: Unexpected '%' for nonderived-type variable 'x' at (1) 20181104..20190824 : ICE in check_assumed_size_reference/gfc_format_decoder 20191005..20200125 : ICE in gimplify_expr >= 20200508 : accepted, no Error, no ICE (sorry for the sparse coverage with r9 binaries between 20200125 and 20200508)