add backdate_admonition to depwarn=error (#58266)

This is close to the expected behavior after deprecations are removed
(other than that the b->globalref->mod in the printed message here will
be the source module instead of the destination module, which may
sometimes cause confusing printing here, but probably rarely). I also
needed this recently to find a place this warning occurred, so I think
it should be merged now and get feedback later.

Closes #57969

Author: vtjnash

src/module.c

@@ -845,12 +845,15 @@ JL_DLLEXPORT jl_module_t *jl_get_module_of_binding(jl_module_t *m, jl_sym_t *var
 
 static NOINLINE void print_backdate_admonition(jl_binding_t *b) JL_NOTSAFEPOINT
 {
+    if (jl_options.depwarn == JL_OPTIONS_DEPWARN_ERROR)
+        jl_undefined_var_error(b->globalref->name, (jl_value_t*)b->globalref->mod);
     jl_safe_printf(
         "WARNING: Detected access to binding `%s.%s` in a world prior to its definition world.\n"
         "  Julia 1.12 has introduced more strict world age semantics for global bindings.\n"
         "  !!! This code may malfunction under Revise.\n"
         "  !!! This code will error in future versions of Julia.\n"
-        "Hint: Add an appropriate `invokelatest` around the access to this binding.\n",
+        "Hint: Add an appropriate `invokelatest` around the access to this binding.\n"
+        "To make this warning an error, and hence obtain a stack trace, use `julia --depwarn=error`.\n",
         jl_symbol_name(b->globalref->mod->name), jl_symbol_name(b->globalref->name));
 }