https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107951
Bug ID: 107951
Summary: Invalid flexible array use not detected in nested
structs by the C frontend
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: siddhesh at gcc dot gnu.org
Target Milestone: ---
The following program:
typedef struct {
char pad;
char data[];
} F2;
typedef struct {
F2 flex;
unsigned pad;
} S2;
#define NULL (void *) 0
__SIZE_TYPE__
nested_flexarray (__SIZE_TYPE__ n)
{
S2 *p = __builtin_malloc (n);
return __builtin_dynamic_object_size (p->flex.data, 1);
}
ends up treating data[] as a zero sized array in C instead of flagging an
error. This is correctly handled in the C++ driver.
