Exceptions in the output task result in an empty response with no explanation

[pjcreath]

Issue

The exception, of course, was my fault, but the symptoms were mystifying: all subsequent prompts would do nothing until I restarted aider. Troubleshooting was not fun.

Here's a sample fix:

diff --git a/aider/coders/base_coder.py b/aider/coders/base_coder.py
index f9564a61b..2c7b1d89f 100755
--- a/aider/coders/base_coder.py
+++ b/aider/coders/base_coder.py
@@ -1323,10 +1323,18 @@ class Coder:
                             if isinstance(exception, SwitchCoder):
                                 await self.io.output_task
                                 raise exception
+                            self.io.tool_error(f"Error during generation: {exception}")
+                            if self.verbose:
+                                traceback.print_exception(
+                                    type(exception), exception, exception.__traceback__
+                                )
 
                         # Stop spinner when processing task completes
                         self.io.stop_spinner()
 
+                        # and stop monitoring the output task
+                        self.io.output_task = None
+
                 await self.auto_save_session()
                 await asyncio.sleep(0.01)  # Small yield to prevent tight loop

Note that we have to clear self.io.output_task to avoid infinite output. Breaking the while loop prevented any output, and raising the exception caused a tight infinite loop elsewhere.

Version and model info

Aider v0.88.27

[dwash96]

Good looking out, I'll place this in the next update