fix: print exception string with exception stage

docs/CHANGELOG.md

@@ -12,6 +12,7 @@
 - fix: eval validator python script before validating
 - fix: do not strip string content when preparing lazy data
 - fix: catch ApiNotFound exception when loading testcases
+- fix: print exception string with exception stage
 
 ## 2.4.8 (2019-12-25)
 

httprunner/cli.py

@@ -105,6 +105,7 @@ def main():
             err_code |= (0 if summary and summary["success"] else 1)
     except Exception as ex:
         color_print("!!!!!!!!!! exception stage: {} !!!!!!!!!!".format(runner.exception_stage), "YELLOW")
+        color_print(str(ex), "RED")
         capture_exception(ex)
         err_code = 1