olabusayoT commented on code in PR #1337:
URL: https://github.com/apache/daffodil/pull/1337#discussion_r1841101905


##########
daffodil-runtime1/src/main/scala/org/apache/daffodil/runtime1/processors/PackedBinaryTraits.scala:
##########
@@ -51,7 +52,15 @@ abstract class PackedBinaryDecimalBaseParser(
 
   def parse(start: PState): Unit = {
     val nBits = getBitLength(start)
-    if (nBits == 0) return // zero length is used for outputValueCalc often.
+    if (nBits == 0) {
+      PE(
+        start,
+        "Number of bits %d out of range for a binary decimal. " +
+          "An unsigned decimal with length 1 bit could be used instead.",

Review Comment:
   I'm not sure about that comment. Isn't OVC only used on unparsing? Also, 
none of our OVC tests failed when we changed the Return to a PE



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