Here are five possible patches for the CWE-476 vulnerability at line 7:

Patch 1: Add a null check before the assertion
```c
if (func_obj_p == NULL)
{
  return ecma_raise_type_error (ECMA_ERR_FUNCTION_OBJECT_IS_NULL);
}
JERRY_ASSERT (!ecma_is_lexical_environment (func_obj_p));
```

Patch 2: Use a safe macro to check for null
```c
#define SAFE_ASSERT(condition) ((condition) ? (void)0 : abort())
SAFE_ASSERT (func_obj_p != NULL && !ecma_is_lexical_environment (func_obj_p));
```

Patch 3: Return an error value if the pointer is null
```c
if (func_obj_p == NULL)
{
  return ECMA_VALUE_ERROR;
}
JERRY_ASSERT (!ecma_is_lexical_environment (func_obj_p));
```

Patch 4: Use a ternary operator to avoid dereferencing null
```c
JERRY_ASSERT (func_obj_p != NULL && (func_obj_p ? !ecma_is_lexical_environment (func_obj_p) : true));
```

Patch 5: Split the assertion into two separate checks
```c
JERRY_ASSERT (func_obj_p != NULL);
if (func_obj_p != NULL)
{
  JERRY_ASSERT (!ecma_is_lexical_environment (func_obj_p));
}
```