use IAE

src/main/java/org/broadinstitute/hellbender/utils/genotyper/ReadLikelihoods.java

@@ -829,7 +829,7 @@ public void filterToOnlyOverlappingUnclippedReads(final GenomeLoc location) {
      */
     public void filterPoorlyModeledReads(final double maximumErrorPerBase) {
         if (alleles.numberOfAlleles() == 0) {
-            throw new IllegalStateException("unsupported for read-likelihood collections with no alleles");
+            throw new IllegalArgumentException("unsupported for read-likelihood collections with no alleles");
         }
         if (Double.isNaN(maximumErrorPerBase) || maximumErrorPerBase <= 0.0) {
             throw new IllegalArgumentException("the maximum error per base must be a positive number");