https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106560
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The full backtrace:
t.c:4:1: warning: data definition has no type or storage class
4 | a;
| ^
t.c:4:1: warning: type defaults to ‘int’ in declaration of ‘a’ [-Wimplicit-int]
t.c:4:1: error: conflicting types for ‘a’; have ‘int’
t.c:2:8: note: previous declaration of ‘a’ with type ‘void **’
2 | void **a;
| ^
Analyzing compilation unit
t.c: In function ‘b’:
t.c:3:19: internal compiler error: tree check: expected class ‘type’, have
‘exceptional’ (error_mark) in useless_type_conversion_p, at gimple-expr.cc:87
3 | void b() { void **c = a; }
| ^
0x182bb35 tree_class_check_failed(tree_node const*, tree_code_class, char
const*, int, char const*)
/home/apinski/src/upstream-gcc-git/gcc/gcc/tree.cc:8867
0xac8be5 tree_class_check(tree_node*, tree_code_class, char const*, int, char
const*)
/home/apinski/src/upstream-gcc-git/gcc/gcc/tree.h:3631
0xf5f04d useless_type_conversion_p(tree_node*, tree_node*)
/home/apinski/src/upstream-gcc-git/gcc/gcc/gimple-expr.cc:87
0xfcd0e4 gimplify_modify_expr
/home/apinski/src/upstream-gcc-git/gcc/gcc/gimplify.cc:6040
0xffb8c1 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
/home/apinski/src/upstream-gcc-git/gcc/gcc/gimplify.cc:15209
0xfd172d gimplify_stmt(tree_node**, gimple**)
/home/apinski/src/upstream-gcc-git/gcc/gcc/gimplify.cc:7156
0xfbb246 gimplify_and_add(tree_node*, gimple**)
/home/apinski/src/upstream-gcc-git/gcc/gcc/gimplify.cc:496
0xfbfcba gimplify_decl_expr
/home/apinski/src/upstream-gcc-git/gcc/gcc/gimplify.cc:1942
0xffc5fb gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
/home/apinski/src/upstream-gcc-git/gcc/gcc/gimplify.cc:15406
0xfd172d gimplify_stmt(tree_node**, gimple**)
/home/apinski/src/upstream-gcc-git/gcc/gcc/gimplify.cc:7156
0xfbdd58 gimplify_bind_expr
/home/apinski/src/upstream-gcc-git/gcc/gcc/gimplify.cc:1434
0xffc61c gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
/home/apinski/src/upstream-gcc-git/gcc/gcc/gimplify.cc:15410
0xfd172d gimplify_stmt(tree_node**, gimple**)
/home/apinski/src/upstream-gcc-git/gcc/gcc/gimplify.cc:7156
0x10003ce gimplify_body(tree_node*, bool)
/home/apinski/src/upstream-gcc-git/gcc/gcc/gimplify.cc:16466
0x1000ca4 gimplify_function_tree(tree_node*)
/home/apinski/src/upstream-gcc-git/gcc/gcc/gimplify.cc:16665
0xd4e447 cgraph_node::analyze()
/home/apinski/src/upstream-gcc-git/gcc/gcc/cgraphunit.cc:676
0xd504e8 analyze_functions
/home/apinski/src/upstream-gcc-git/gcc/gcc/cgraphunit.cc:1240
0xd536b5 symbol_table::finalize_compilation_unit()
/home/apinski/src/upstream-gcc-git/gcc/gcc/cgraphunit.cc:2500
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
