fja_checker: Put more details about exceptions into log

fja_checker/__main__.py

@@ -4,6 +4,7 @@ from lib.parsing.parser import Parser, ParsingError
 from lib.checker import get_task, dfa_transform, nfa_transform, check_task, check_empty, check_alphabets, exit_correct, exit_incorrect
 import sys
 import signal
+import traceback
 
 
 def print_extra_word_ce(student_word):
@@ -20,6 +21,7 @@ def dfa_task(teacher_type, teacher_string, task, student_string):
         teacher_solution = dfa_transform(teacher_string, teacher_type)
     except ParsingError as ex:
         print("Nastala chyba při parsování:", ex)
+        traceback.print_exc(file=sys.stderr)
         exit_incorrect()
 
     task_solved = ""
@@ -156,6 +158,7 @@ def main():
 
     except Exception as ex:
         print("Error inside of fja_checker:", ex.args)
+        traceback.print_exc(file=sys.stderr)
         exit(1)
 
 if __name__ == "__main__":