https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89017
--- Comment #1 from G. Steinmetz <gs...@t-online.de> ---
$ gdc-9-20190120 -c z1.d -g -O2
during GIMPLE pass: fnsplit
In function 'g':
d21: internal compiler error: in dwarf2out_abstract_function, at
dwarf2out.c:22550
0x872772 dwarf2out_abstract_function
../../gcc/dwarf2out.c:22550
0xbf1c89 tree_function_versioning(tree_node*, tree_node*, vec<ipa_replace_map*,
va_gc, vl_embed>*, bool, bitmap_head*, bool, bitmap_head*, basic_block_def*)
../../gcc/tree-inline.c:5879
0x810276 cgraph_node::create_version_clone_with_body(vec<cgraph_edge*, va_heap,
vl_ptr>, vec<ipa_replace_map*, va_gc, vl_embed>*, bitmap_head*, bool,
bitmap_head*, basic_block_def*, char const*, tree_node*)
../../gcc/cgraphclones.c:1078
0x12e488f split_function
../../gcc/ipa-split.c:1327
0x12e7a01 execute_split_functions
../../gcc/ipa-split.c:1825
