Is there a way to trace PHP errors logged from Rules? Occasionally I'm seeing an error in the error_log

[10-Apr-2015 10:16:45 America] PHP Parse error:  syntax error, unexpected 'Some text' (T_STRING) in /home/simulab1/public_html/profiles/commerce_kickstart/modules/contrib/rules/modules/php.eval.inc(146) : eval()'d code on line 1


This could be coming from any number of Rules we have. Is there any way to pin this down to the specific Rule in question?

TIA
If Xdebug is installed in the machine, it dumps a stack trace to your Apache logs. That might give you a better hint at the context. 

If that fails, look at all your Commerce rules and try to find the one with a execute PHP action.