fixes #2369

compiler/semexprs.nim

@@ -456,7 +456,7 @@ proc changeType(n: PNode, newType: PType, check: bool) =
           internalError(m.info, "changeType(): invalid tuple constr")
           return
         if tup.n != nil:
-          var f = getSymFromList(newType.n, m.sym.name)
+          var f = getSymFromList(tup.n, m.sym.name)
           if f == nil:
             internalError(m.info, "changeType(): invalid identifier")
             return

tests/tuples/tgeneric_tuple2.nim

@@ -0,0 +1,17 @@
+
+# bug #2369
+
+type HashedElem[T] = tuple[num: int, storedVal: ref T]
+
+proc append[T](tab: var seq[HashedElem[T]], n: int, val: ref T) =
+    #tab.add((num: n, storedVal: val))
+    var he: HashedElem[T] = (num: n, storedVal: val)
+    #tab.add(he)
+
+var g: seq[HashedElem[int]] = @[]
+
+proc foo() =
+    var x: ref int
+    new(x)
+    x[] = 77
+    g.append(44, x)