Index: openacs-4/packages/xowiki/tcl/form-field-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xowiki/tcl/form-field-procs.tcl,v
diff -u -r1.290 -r1.291
--- openacs-4/packages/xowiki/tcl/form-field-procs.tcl	24 Oct 2024 17:02:23 -0000	1.290
+++ openacs-4/packages/xowiki/tcl/form-field-procs.tcl	25 Nov 2024 16:24:22 -0000	1.291
@@ -284,7 +284,16 @@
     }
     set :html(id) ${:id}
     #if {[info exists :default]} {set :value [:default]}
-    :config_from_spec ${:spec}
+
+    #
+    # An invalid spec could leave the broken formfield object behind.
+    #
+    try {
+      :config_from_spec ${:spec}
+    } on error {errmsg} {
+      :destroy
+      error $errmsg
+    }
   }
 
   #