Stop pretending that specpdl overflow can ever occur

* src/eval.c (grow_specpdl_allocation): Remove impossible error.
* src/data.c (syms_of_data): Note obsolence of
`excessive-variable-binding`.

1 files changed, 3 insertions, 2 deletions

diff --git a/src/data.c b/src/data.c
index 8dc5000424e..4ab37e86ce5 100644
--- a/src/data.c
+++ b/src/data.c
@@ -4217,10 +4217,11 @@ syms_of_data (void)
   Fput (Qrecursion_error, Qerror_message, build_pure_c_string
         ("Excessive recursive calling error"));
 
-  PUT_ERROR (Qexcessive_variable_binding, recursion_tail,
-             "Variable binding depth exceeds max-specpdl-size");
   PUT_ERROR (Qexcessive_lisp_nesting, recursion_tail,
              "Lisp nesting exceeds `max-lisp-eval-depth'");
+  /* Error obsolete (from 29.1), kept for compatibility.  */
+  PUT_ERROR (Qexcessive_variable_binding, recursion_tail,
+             "Variable binding depth exceeds max-specpdl-size");
 
   /* Types that type-of returns.  */
   DEFSYM (Qinteger, "integer");