--- lib/iex/test/iex/helpers_test.exs.orig	2018-05-07 12:36:01.000000000 +0200

+++ lib/iex/test/iex/helpers_test.exs	2018-06-07 10:20:27.196176134 +0200

@@ -195,30 +195,38 @@

                ~r/#{@elixir_erl}:\d+$/

     end

-    test "opens OTP lists module" do

-      assert capture_iex("open(:lists)") |> maybe_trim_quotes() =~ ~r/#{@lists_erl}:\d+$/

-    end

-

-    test "opens OTP lists module.function" do

-      assert capture_iex("open(:lists.reverse)") |> maybe_trim_quotes() =~ ~r/#{@lists_erl}:\d+$/

-    end

-

-    test "opens OTP lists module.function/arity" do

-      assert capture_iex("open(:lists.reverse/1)") |> maybe_trim_quotes() =~

-               ~r/#{@lists_erl}:\d+$/

-    end

-

-    test "opens OTP httpc module" do

-      assert capture_iex("open(:httpc)") |> maybe_trim_quotes() =~ ~r/#{@httpc_erl}:\d+$/

-    end

-

-    test "opens OTP httpc module.function" do

-      assert capture_iex("open(:httpc.request)") |> maybe_trim_quotes() =~ ~r/#{@httpc_erl}:\d+$/

-    end

-

-    test "opens OTP httpc module.function/arity" do

-      assert capture_iex("open(:httpc.request/1)") |> maybe_trim_quotes() =~

-               ~r/#{@httpc_erl}:\d+$/

+    # Some installations remove the source file once Erlang is compiled. See #7348.

+    if File.regular?(@lists_erl) do

+      test "opens OTP lists module" do

+        assert capture_iex("open(:lists)") |> maybe_trim_quotes() =~ ~r/#{@lists_erl}:\d+$/

+      end

+

+      test "opens OTP lists module.function" do

+        assert capture_iex("open(:lists.reverse)") |> maybe_trim_quotes() =~

+                 ~r/#{@lists_erl}:\d+$/

+      end

+

+      test "opens OTP lists module.function/arity" do

+        assert capture_iex("open(:lists.reverse/1)") |> maybe_trim_quotes() =~

+                 ~r/#{@lists_erl}:\d+$/

+      end

+    end

+

+    # Some installations remove the source file once Erlang is compiled. See #7348.

+    if File.regular?(@httpc_erl) do

+      test "opens OTP httpc module" do

+        assert capture_iex("open(:httpc)") |> maybe_trim_quotes() =~ ~r/#{@httpc_erl}:\d+$/

+      end

+

+      test "opens OTP httpc module.function" do

+        assert capture_iex("open(:httpc.request)") |> maybe_trim_quotes() =~

+                 ~r/#{@httpc_erl}:\d+$/

+      end

+

+      test "opens OTP httpc module.function/arity" do

+        assert capture_iex("open(:httpc.request/1)") |> maybe_trim_quotes() =~

+                 ~r/#{@httpc_erl}:\d+$/

+      end

     end

     test "errors OTP preloaded module" do