I looked this particular internal error code up and didn't see any issues that we've dealt with that would be affecting you in this case (they were all fixed in 8.1 or earlier). Internal errors are hard to diagnose for the reason why they failed - all you can really say for sure is that the compiler failed in an unexpected manner. In these cases, the best route to take is to submit a Premier Support issue (https://premier.intel.com). You usually will need to submit a preprocessed version of the source file, but since this is happening at link time, you might need to provide object files/static libs instead in order for us to reproduce and diagnose the issue. Also be sure to provide the compiler/linker options used and the exact version of the compiler (9.1.XXX).
If you can't provide a reproducible test case, internal errors are very difficult to triage and fix, but I would still recommend that you submit a Premier Support issue in this case, as there are several things we could have you try as well to try to locate the problem.
