https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77884
--- Comment #1 from Gerhard Steinmetz <gerhard.steinmetz.fort...@t-online.de> --- With -fcoarray=single : $ gfortran-7-20161002 -fcoarray=single -c z1.f90 z1.f90:1:0: program p Error: non-trivial conversion at assignment struct array2_t struct array1_t class.0._data = parm.1; z1.f90:1:0: internal compiler error: verify_gimple failed 0xc63abd verify_gimple_in_seq(gimple*) ../../gcc/tree-cfg.c:4876 0x9dafa2 gimplify_body(tree_node*, bool) ../../gcc/gimplify.c:12238 0x9db336 gimplify_function_tree(tree_node*) ../../gcc/gimplify.c:12326 0x843447 cgraph_node::analyze() ../../gcc/cgraphunit.c:626 0x846813 analyze_functions ../../gcc/cgraphunit.c:1087 0x847518 symbol_table::finalize_compilation_unit() ../../gcc/cgraphunit.c:2554