Ensure hack-local-variables is run in a fundamental mode buffer.

This fixes bug #23827.

* src/buffer.c (set-buffer-major-mode): Run `fundamental-mode' when the buffer
gets set to that mode, so that `run-mode-hooks', and thus
`hack-local-variables' get run.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/buffer.c b/src/buffer.c
index b4b83043f36..8756cbbbd7d 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -1984,7 +1984,9 @@ the current buffer's major mode.  */)
         function = BVAR (current_buffer, major_mode);
     }
 
-  if (NILP (function) || EQ (function, Qfundamental_mode))
+  if (NILP (function)) /* If function is `fundamental-mode', allow it to run
+                          so that `run-mode-hooks' and thus
+                          `hack-local-variables' get run. */
     return Qnil;
 
   count = SPECPDL_INDEX ();