fixes #2489

compiler/ccgexprs.nim

@@ -1587,7 +1587,7 @@ proc genRangeChck(p: BProc, n: PNode, d: var TLoc, magic: string) =
         [getTypeDesc(p.module, dest), rdCharLoc(a)])
   else:
     initLocExpr(p, n.sons[0], a)
-    if leValue(n.sons[2], n.sons[1]):
+    if not leValue(n.sons[1], n.sons[2]):
       internalError(n.info, "range check will always fail; empty range")
     putIntoDest(p, d, dest, ropecg(p.module, "(($1)#$5($2, $3, $4))", [
         getTypeDesc(p.module, dest), rdCharLoc(a),

tests/ccgbugs/tarray_equality.nim

@@ -0,0 +1,9 @@
+discard """
+  output: '''true'''
+"""
+
+# bug #2489
+
+let a = [1]
+let b = [1]
+echo a == b