File test.patch of Package python-MechanicalSoup

Index: mechanicalsoup-1.4.0/mechanicalsoup/stateful_browser.py
===================================================================
--- mechanicalsoup-1.4.0.orig/mechanicalsoup/stateful_browser.py
+++ mechanicalsoup-1.4.0/mechanicalsoup/stateful_browser.py
@@ -231,16 +231,23 @@ class StatefulBrowser(Browser):
                 raise LinkNotFoundError
             form = selector
         else:
-            # nr is a 0-based index for consistency with mechanize
-            found_forms = self.page.select(selector,
-                                           limit=nr + 1)
-            if len(found_forms) != nr + 1:
+            m = re.fullmatch(r"form\[\s*([a-zA-Z_-]+)\s*\$\s*=\s*['\"](.+?)['\"]\s*\]", selector.strip())
+            if m:
+                attr, suffix = m.groups()
+                found_forms = [
+                            f for f in self.page.find_all("form")
+                            if f.has_attr(attr) and f[attr].endswith(suffix)
+                            ]
+            else:
+                found_forms = self.page.select(selector)
+
+            if len(found_forms) <= nr:
                 if self.__debug:
                     print('select_form failed for', selector)
                     self.launch_browser()
                 raise LinkNotFoundError()
 
-            form = found_forms[-1]
+            form = found_forms[nr]
 
         if form and form.has_attr('id'):
             form_id = form["id"]