fixes #2760

compiler/semexprs.nim

@@ -439,7 +439,7 @@ proc changeType(c: PContext; n: PNode, newType: PType, check: bool) =
     for i in countup(0, sonsLen(n) - 1):
       changeType(c, n.sons[i], elemType(newType), check)
   of nkPar, nkTupleConstr:
-    let tup = newType.skipTypes({tyGenericInst, tyAlias, tySink})
+    let tup = newType.skipTypes({tyGenericInst, tyAlias, tySink, tyDistinct})
     if tup.kind != tyTuple:
       if tup.kind == tyObject: return
       globalError(c.config, n.info, "no tuple type for constructor")

tests/distinct/tdistinct.nim

@@ -75,3 +75,13 @@ block tconsts:
 
   type MyBoolArr = distinct array[3, bool]
   const barr:MyBoolArr = MyBoolArr([true, false, true])
+
+# bug #2760
+
+type
+  DistTup = distinct tuple
+    foo, bar: string
+
+const d: DistTup = DistTup((
+  foo:"FOO", bar:"BAR"
+))