fixes #1612

compiler/semexprs.nim

@@ -1943,8 +1943,7 @@ proc semExport(c: PContext, n: PNode): PNode =
     var o: TOverloadIter
     var s = initOverloadIter(o, c, a)
     if s == nil:
-      localError(a.info, errGenerated, "invalid expr for 'export': " &
-          renderTree(a))
+      localError(a.info, errGenerated, "cannot export: " & renderTree(a))
     elif s.kind == skModule:
       # forward everything from that module:
       strTableAdd(c.module.tab, s)

tests/modules/mexport2a.nim

@@ -3,3 +3,5 @@ import mexport2b
 export mexport2b
 proc printAbc*() = echo "abc"
 
+proc foo*() = echo "A.foo"
+

tests/modules/mexport2b.nim

@@ -1 +1,3 @@
 proc printXyz*() = echo "xyz"
+
+proc foo*(x: int) = echo "B.foo"

tests/modules/texport2.nim

@@ -1,4 +1,4 @@
-# bug #1595
+# bug #1595, #1612
 
 import mexport2a
 
@@ -8,3 +8,4 @@ proc main() =
   printXyz()
 
 main()
+foo(3)