Fix invalid module reference in prune_stacktrace (#15272)

Closes #15271

Author: lukaszsamson

lib/elixir/src/elixir_dispatch.erl

@@ -349,7 +349,7 @@ prune_stacktrace([{_, _, [Caller | _], _} | _], _MFA, Info, {ok, Caller}) ->
 prune_stacktrace([{M, F, A, _} | _], {M, F, A}, Info, _E) ->
   Info;
 %% We've reached the elixir_dispatch internals, skip it with the rest
-prune_stacktrace([{Mod, _, _, _} | _], _MFA, Info, _E) when Mod == elixir_dispatch; Mod == elixir_exp ->
+prune_stacktrace([{Mod, _, _, _} | _], _MFA, Info, _E) when Mod == elixir_dispatch; Mod == elixir_expand ->
   Info;
 prune_stacktrace([H | T], MFA, Info, E) ->
   [H | prune_stacktrace(T, MFA, Info, E)];

lib/elixir/test/elixir/code_test.exs

@@ -215,6 +215,30 @@ defmodule CodeTest do
       end
     end
 
+    test "prunes elixir_expand from macro expansion stacktraces" do
+      defmodule PruneStacktraceMacro do
+        defmacro bad do
+          quote do
+            receive 1
+          end
+        end
+      end
+
+      stacktrace =
+        try do
+          Code.eval_quoted(
+            quote do
+              require PruneStacktraceMacro
+              PruneStacktraceMacro.bad()
+            end
+          )
+        rescue
+          CompileError -> __STACKTRACE__
+        end
+
+      refute Enum.any?(stacktrace, &match?({:elixir_expand, :expand, 3, _}, &1))
+    end
+
     test "warns when lexical tracker process is dead" do
       {pid, ref} = spawn_monitor(fn -> :ok end)
       assert_receive {:DOWN, ^ref, _, _, _}