http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58510
Bug ID: 58510
Summary: [4.9 regression] [c++0x] ICE with multiple non-static
data initializations in union
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: reichelt at gcc dot gnu.org
The following invalid code snippet (compiled with "-std=c++0x") triggers an ICE
on trunk:
========================
void foo()
{
union
{
int i = 0;
char c = 0;
};
}
========================
bug.cc: In function 'void foo()':
bug.cc:4:3: error: multiple fields in union 'foo()::<anonymous union>'
initialized
{
^
bug.cc: In constructor 'constexpr foo()::<anonymous union>::<constructor>()':
bug.cc:4:3: error: initializations for multiple members of 'foo()::<anonymous
union>'
bug.cc: In function 'void foo()':
bug.cc:7:4: note: synthesized method 'constexpr foo()::<anonymous
union>::<constructor>()' first required here
};
^
bug.cc:7:4: internal compiler error: in complete_ctor_at_level_p, at
expr.c:5650
0x89a301 complete_ctor_at_level_p(tree_node const*, long, tree_node const*)
../../gcc/gcc/expr.c:5650
0x89a68e categorize_ctor_elements_1
../../gcc/gcc/expr.c:5602
0x9684b6 gimplify_init_constructor
../../gcc/gcc/gimplify.c:3966
0x96993e gimplify_modify_expr_rhs
../../gcc/gcc/gimplify.c:4518
0x969cad gimplify_modify_expr
../../gcc/gcc/gimplify.c:4834
0x95e07b gimplify_expr(tree_node**, gimple_statement_d**, gimple_statement_d**,
bool (*)(tree_node*), int)
../../gcc/gcc/gimplify.c:7322
0x961ef6 gimplify_stmt(tree_node**, gimple_statement_d**)
../../gcc/gcc/gimplify.c:5699
0x95f987 gimplify_and_add
../../gcc/gcc/gimplify.c:329
0x95f987 gimplify_decl_expr
../../gcc/gcc/gimplify.c:1472
0x95f987 gimplify_expr(tree_node**, gimple_statement_d**, gimple_statement_d**,
bool (*)(tree_node*), int)
../../gcc/gcc/gimplify.c:7489
0x961ef6 gimplify_stmt(tree_node**, gimple_statement_d**)
../../gcc/gcc/gimplify.c:5699
0x95eccf gimplify_cleanup_point_expr
../../gcc/gcc/gimplify.c:5475
0x95eccf gimplify_expr(tree_node**, gimple_statement_d**, gimple_statement_d**,
bool (*)(tree_node*), int)
../../gcc/gcc/gimplify.c:7659
0x961ef6 gimplify_stmt(tree_node**, gimple_statement_d**)
../../gcc/gcc/gimplify.c:5699
0x962bb1 gimplify_bind_expr
../../gcc/gcc/gimplify.c:1213
0x95e73f gimplify_expr(tree_node**, gimple_statement_d**, gimple_statement_d**,
bool (*)(tree_node*), int)
../../gcc/gcc/gimplify.c:7493
0x961ef6 gimplify_stmt(tree_node**, gimple_statement_d**)
../../gcc/gcc/gimplify.c:5699
0x963541 gimplify_body(tree_node*, bool)
../../gcc/gcc/gimplify.c:8356
0x9639f6 gimplify_function_tree(tree_node*)
../../gcc/gcc/gimplify.c:8488
0x7fa9d7 analyze_function
../../gcc/gcc/cgraphunit.c:636
Please submit a full bug report, [etc.]
