See https://github.com/sagemathinc/smc/issues/223
Line numbers examples
Error in lines 2-2
Traceback (most recent call last):
File "/projects/sage/sage-6.9/local/lib/python2.7/site-packages/smc_sagews/sage_server.py", line 905, in execute
exec compile(block+'\n', '', 'single') in namespace, locals
File "", line 1, in <module>
ZeroDivisionError: integer division or modulo by zero