Fix a bug when inspecting records nested in tuples

Author: José Valim

lib/elixir/lib/binary/inspect.ex

@@ -335,7 +335,7 @@ defimpl Binary.Inspect, for: Tuple do
     list = tuple_to_list(record)
     [name|tail] = list
 
-    if (fields = record_fields(name)) && (length(fields) == size(record) - 1) do
+    if is_atom(name) && (fields = record_fields(name)) && (length(fields) == size(record) - 1) do
       if Enum.first(tail) == :__exception__ do
         record_join(name, tl(fields), tl(tail), opts)
       else

lib/elixir/test/elixir/binary/inspect_test.exs

@@ -136,6 +136,12 @@ defmodule Binary.Inspect.TupleTest do
     assert inspect(:something.new) == ":something[a: nil, b: nil]"
   end
 
+  defrecord Rec, value: 1
+
+  test :two_items_record do
+    assert inspect({ Rec[value: 1], 1 }) == "{Binary.Inspect.TupleTest.Rec[value: 1],1}"
+  end
+
   test :empty do
     assert inspect({}) == "{}"
   end