### Patch 1: Add NULL Check Before Calling ecma_is_lexical_environment
```c
7   if (func_obj_p != NULL) {
8     JERRY_ASSERT (!ecma_is_lexical_environment (func_obj_p));
9   } else {
10    // Handle NULL func_obj_p
11    return ECMA_VALUE_ERROR;
12  }
```

### Patch 2: Use a Safer Alternative to JERRY_ASSERT
```c
7   if (func_obj_p == NULL || ecma_is_lexical_environment (func_obj_p)) {
8     // Handle error condition
9     return ECMA_VALUE_ERROR;
10  }
```

### Patch 3: Check for NULL Before Calling ecma_is_lexical_environment
```c
7   if (func_obj_p != NULL) {
8     if (ecma_is_lexical_environment (func_obj_p)) {
9       // Handle error condition
10      return ECMA_VALUE_ERROR;
11    }
12  } else {
13    // Handle NULL func_obj_p
14    return ECMA_VALUE_ERROR;
15  }
```

### Patch 4: Use a Try-Catch Block to Handle Potential Errors
```c
7   try {
8     JERRY_ASSERT (func_obj_p != NULL && !ecma_is_lexical_environment (func_obj_p));
9   } catch (...) {
10    // Handle error condition
11    return ECMA_VALUE_ERROR;
12  }
```

### Patch 5: Validate func_obj_p Before Calling ecma_is_lexical_environment
```c
7   if (!ecma_is_value_object (func_obj_p)) {
8     // Handle error condition
9     return ECMA_VALUE_ERROR;
10  }
11  JERRY_ASSERT (!ecma_is_lexical_environment (func_obj_p));
```

Note: These patches are just suggestions and may need to be adapted to the specific requirements of the codebase. Additionally, the best patch will depend on the specific use case and the desired behavior when `func_obj_p` is NULL or a lexical environment.