https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70937
--- Comment #10 from Dominique d'Humieres <dominiq at lps dot ens.fr> --- With the second patch in comment 9 applied on top of my working tree (heavily patched), I get [Book15] f90/bug% gfc /opt/gcc/_clean/gcc/testsuite/gfortran.dg/allocatable_function_4.f90 -fdump-tree-original /opt/gcc/_clean/gcc/testsuite/gfortran.dg/allocatable_function_4.f90:52:0: end function unique_A internal compiler error: tree check: expected tree that contains 'decl common' structure, have 'identifier_node' in print_declaration, at tree-pretty-print.c:3287