Stack overflow in regexp matcher

在Emacs里面使用gdb-many-windows调试，非常方便。但是有时候碰到复杂的局部变量，gdb-mi会无法显示，并报错：Stack overflow in regexp matcher。

不能显示局部变量问题不大，大不了手工使用p命令。问题是之后gdb-mi的状态就乱掉了，无法继续调试，非常烦人。

终于，使用下面的patch，一切都平静了……

diff --git a/lisp/progmodes/gdb-mi.el b/lisp/progmodes/gdb-mi.el
index 27846ed..d147b82 100644
--- a/lisp/progmodes/gdb-mi.el
+++ b/lisp/progmodes/gdb-mi.el
@@ -4022,7 +4022,7 @@ member."
 ;; Don't display values of arrays or structures.
 ;; These can be expanded using gud-watch.
 (defun gdb-locals-handler-custom ()
-  (let ((locals-list (bindat-get-field (gdb-json-partial-output) 'locals))
+  (let ((locals-list (bindat-get-field (ignore-errors (gdb-json-partial-output)) 'locals))
         (table (make-gdb-table)))
     (dolist (local locals-list)
       (let ((name (bindat-get-field local 'name))