### 6.1 Have You Found a Bug?

If you are not sure whether you have found a bug, here are some guidelines:

- If the linker gets a fatal signal, for any input whatever, that is a ld bug. Reliable linkers never crash.

- If ld produces an error message for valid input, that is a bug.

- If ld does not produce an error message for invalid input, that may be a bug. In the general case, the linker can not verify that object files are correct.
- If you are an experienced user of linkers, your suggestions for improvement of ld are welcome in any case.