Fix gud parsing of empty jdb classpaths

* lisp/progmodes/gud.el (gud-jdb-marker-filter): Parse empty
classpaths (like classpath: []) correctly (bug#55957).

diff --git a/lisp/progmodes/gud.el b/lisp/progmodes/gud.el
index 213ebef92f570ce9c98f9f19b53afa8127e5e686..26fecf9c9f173e30342aa89574ebb289565ac44e 100644 (file)
--- a/lisp/progmodes/gud.el
+++ b/lisp/progmodes/gud.el
@@ -2460,7 +2460,7 @@ during jdb initialization depending on the value of
   ;;  not supported/followed)
   (if (and gud-jdb-use-classpath
           (not gud-jdb-classpath-string)
-          (or (string-match "classpath:[ \t[]+\\([^]]+\\)" gud-marker-acc)
+          (or (string-match "classpath:[ \t[]+\\([^]]*\\)" gud-marker-acc)
               (string-match "-classpath[ \t\"]+\\([^ \"]+\\)" gud-marker-acc)))
       (setq gud-jdb-classpath
            (gud-jdb-parse-classpath-string