Need to be prepared for exceptions in #print_variable

E.g. such exception may occur for mock objects

Author: os97673

ChangeLog.md

@@ -1,3 +1,8 @@
+## [0.4.31](https://github.com/ruby-debug/ruby-debug-ide/compare/v0.4.30...v0.4.31)
+
+* need to handle mock objects somehow
+  [RUBY-16665](https://youtrack.jetbrains.com/issue/RUBY-16665)
+
 ## [0.4.30](https://github.com/ruby-debug/ruby-debug-ide/compare/v0.4.29...v0.4.30)
 
 * reverting fix for

lib/ruby-debug-ide/version.rb

@@ -1,3 +1,3 @@
 module Debugger
-  IDE_VERSION='0.4.30'
+  IDE_VERSION='0.4.31'
 end

lib/ruby-debug-ide/xml_printer.rb

@@ -178,6 +178,10 @@ def print_variable(name, value, kind)
           has_children, value.respond_to?(:object_id) ? value.object_id : value.id)
       print("<value><![CDATA[%s]]></value>", escaped_value_str) if Debugger.rm_protocol_extensions
       print('</variable>')
+    rescue StandardError => e
+      print_debug "Unexpected exception \"%s\"\n%s", e.to_s, e.backtrace.join("\n")
+      print("<variable name=\"%s\" kind=\"%s\" value=\"%s\"/>",
+            CGI.escapeHTML(name), kind, CGI.escapeHTML(value.to_s))
     end
 
     def print_breakpoints(breakpoints)