Merge pull request #78 from AnswerDotAI/fix/77-catch-error-before-exec

catch errors before exec

Author: jph00

execnb/shell.py

@@ -73,7 +73,8 @@ def _run(self, raw_cell, store_history=False, silent=False, shell_futures=True,
         with capture_output(display=display, stdout=stdout and not verbose, stderr=stderr and not verbose) as c:
             result = super().run_cell(raw_cell, store_history, silent, shell_futures=shell_futures, cell_id=cell_id)
         return AttrDict(result=result, stdout='' if semic else c.stdout, stderr=c.stderr,
-                        display_objects=c.outputs, exception=result.error_in_exec, quiet=semic)
+                        display_objects=c.outputs, 
+                        exception=result.error_in_exec or result.error_before_exec, quiet=semic)
 
     def set_path(self, path):
         "Add `path` to python path, or `path.parent` if it's a file"