Changing the compiler to emit a more informative error -- didn't work

AttemptedChange

diff --git a/compiler/sigmatch.nim b/compiler/sigmatch.nim
index 2a9d15b..530f226 100644
--- a/compiler/sigmatch.nim
+++ b/compiler/sigmatch.nim
@@ -251,7 +251,7 @@ proc describeArgs*(c: PContext, n: PNode, startIdx = 1;
         arg = c.semOperand(c, n.sons[i])
         n.sons[i] = arg
     if arg.typ.kind == tyError: return
-    add(result, argTypeToString(arg, prefer))
+    add(result, typeToString(arg.typ, prefer))
     if i != sonsLen(n) - 1: add(result, ", ")
 
 proc typeRel*(c: var TCandidate, f, aOrig: PType, doBind = true): TTypeRelation