DAP: rescue any exception on accessing gvars

Author: ko1

lib/debug/server_dap.rb

@@ -565,7 +565,11 @@ def process_protocol_request req
           case ref[0]
           when :globals
             vars = safe_global_variables.sort.map do |name|
-              gv = eval(name.to_s)
+              begin
+                gv = eval(name.to_s)
+              rescue Exception => e
+                gv = e.inspect
+              end
               {
                 name: name,
                 value: gv.inspect,