fix: raise exception if run fails

Signed-off-by: Donnie Adams <donnie@acorn.io>

Author: thedadams

gptscript/run.py

@@ -57,6 +57,8 @@ async def text(self) -> str:
                 self._err = "Run was aborted"
             else:
                 self._err = str(e)
+
+            raise Exception(self._err)
         finally:
             self._task = None
 

tests/test_gptscript.py

@@ -152,8 +152,11 @@ async def abort_run(run: Run, e: CallFrame | RunFrame | PromptFrame):
 
     run = gptscript.evaluate(ToolDef(instructions="What is the capital of the united states?"),
                              Options(disableCache=True), event_handlers=[abort_run])
+    try:
+        await run.text()
+    except Exception as e:
+        assert "Run was aborted" in str(e), "Unexpected output from abort_run"
 
-    assert "Run was aborted" in await run.text(), "Unexpected output from abort_run"
     assert RunState.Error == run.state(), "Unexpected run state after aborting"