Hi,
A couple of times I’ve had source-builder hang seemingly randomly, with the
following Python backtrace:
Exception in thread _stderr[]:
Traceback (most recent call last):
File "/usr/lib/python3.8/threading.py", line 932, in _bootstrap_inner
self.run()
File "/usr/lib/python3.8/threading.py", line 870, in run
self._target(*self._args, **self._kwargs)
File "/home/anders/work/rtems/rsb/source-builder/sb/execute.py", line 204, in
_readthread
data = data.decode(sys.stdout.encoding)
UnicodeDecodeError: 'utf-8' codec can't decode bytes in position 4094-4095:
unexpected end of data
My guess is that since the loop in execute._readthread() is reading in fixed
4096-byte chunks, occasionally the boundary will fall in the middle of an UTF-8
code point, causing the decode call to throw an error. Since source-builder
stops reading the file handle at that point, it will then deadlock the child
process. Unfortunately, I haven’t yet been able to reliably trigger the issue.
Usually, re-running the same build command succeeds.
Regards,
Anders
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