# Bug report ## Summary On some large scans, the server will crash out with a `Segmentation fault` ## Steps to reproduce Run a slidescan scan. Possibly a few. ## Relevant logs and/or screenshots ``` INFO:root:Starting microscope capture /var/openflexure/data/micrographs/SCAN_JOEL_thin/JOEL_thin_30570_-15586_-348.jpeg INFO:root:Capturing to <openflexure_microscope.captures.capture.CaptureObject object at 0xa0a18890> INFO:root:Stopped MJPEG stream on port 1. Switching to [3280, 2464]. Fatal Python error: Segmentation fault Thread 0x9ea46460 (most recent call first): File "/usr/lib/python3.7/threading.py", line 148 in acquire File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/sync/lock.py", line 76 in acquire File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/sync/lock.py", line 140 in <genexpr> File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/sync/lock.py", line 140 in acquire File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/sync/lock.py", line 151 in __enter__ File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/microscope.py", line 244 in read_settings File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/api/v2/views/instrument.py", line 47 in get File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/views/__init__.py", line 84 in dispatch_request File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/views.py", line 89 in view File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/app.py", line 1936 in dispatch_request File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/app.py", line 1950 in full_dispatch_request File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/app.py", line 2447 in wsgi_app File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/app.py", line 2464 in __call__ File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/werkzeug/serving.py", line 312 in execute File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/werkzeug/serving.py", line 323 in run_wsgi File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/werkzeug/serving.py", line 379 in handle_one_request File "/usr/lib/python3.7/http/server.py", line 426 in handle File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/werkzeug/serving.py", line 345 in handle File "/usr/lib/python3.7/socketserver.py", line 720 in __init__ File "/usr/lib/python3.7/socketserver.py", line 360 in finish_request File "/usr/lib/python3.7/socketserver.py", line 650 in process_request_thread File "/usr/lib/python3.7/threading.py", line 865 in run File "/usr/lib/python3.7/threading.py", line 917 in _bootstrap_inner File "/usr/lib/python3.7/threading.py", line 885 in _bootstrap Thread 0xa3cfe460 (most recent call first): File "/usr/lib/python3.7/threading.py", line 148 in acquire File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/sync/lock.py", line 76 in acquire File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/sync/lock.py", line 140 in <genexpr> File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/sync/lock.py", line 140 in acquire File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/sync/lock.py", line 151 in __enter__ File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/microscope.py", line 276 in force_get_configuration File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/microscope.py", line 308 in get_configuration File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/microscope.py", line 312 in configuration File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/api/v2/views/instrument.py", line 104 in get File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/views/__init__.py", line 235 in dispatch_request File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/views.py", line 89 in view File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/app.py", line 1936 in dispatch_request File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/app.py", line 1950 in full_dispatch_request File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/app.py", line 2447 in wsgi_app File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/app.py", line 2464 in __call__ File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/werkzeug/serving.py", line 312 in execute File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/werkzeug/serving.py", line 323 in run_wsgi File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/werkzeug/serving.py", line 379 in handle_one_request File "/usr/lib/python3.7/http/server.py", line 426 in handle File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/werkzeug/serving.py", line 345 in handle File "/usr/lib/python3.7/socketserver.py", line 720 in __init__ File "/usr/lib/python3.7/socketserver.py", line 360 in finish_request File "/usr/lib/python3.7/socketserver.py", line 650 in process_request_thread File "/usr/lib/python3.7/threading.py", line 865 in run File "/usr/lib/python3.7/threading.py", line 917 in _bootstrap_inner File "/usr/lib/python3.7/threading.py", line 885 in _bootstrap Thread 0xa09ff460 (most recent call first): File "/usr/lib/python3.7/threading.py", line 148 in acquire File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/sync/lock.py", line 76 in acquire File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/sync/lock.py", line 53 in __call__ File "/usr/lib/python3.7/contextlib.py", line 112 in __enter__ File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/camera/pi.py", line 349 in stop_preview File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/api/v2/views/actions/camera.py", line 147 in post File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/ctx.py", line 158 in wrapper File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/actions/thread.py", line 211 in wrapped File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/actions/thread.py", line 180 in run File "/usr/lib/python3.7/threading.py", line 917 in _bootstrap_inner File "/usr/lib/python3.7/threading.py", line 885 in _bootstrap Thread 0xa1cfa460 (most recent call first): File "/usr/lib/python3.7/threading.py", line 148 in acquire File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/sync/lock.py", line 76 in acquire File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/sync/lock.py", line 140 in <genexpr> File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/sync/lock.py", line 140 in acquire File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/sync/lock.py", line 151 in __enter__ File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/microscope.py", line 276 in force_get_configuration File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/microscope.py", line 308 in get_configuration File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/microscope.py", line 312 in configuration File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/api/v2/views/stage.py", line 20 in get File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/marshalling/marshalling.py", line 63 in wrapper File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/views/__init__.py", line 235 in dispatch_request File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/views.py", line 89 in view File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/app.py", line 1936 in dispatch_request File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/app.py", line 1950 in full_dispatch_request File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/app.py", line 2447 in wsgi_app File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/app.py", line 2464 in __call__ File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/werkzeug/serving.py", line 312 in execute File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/werkzeug/serving.py", line 323 in run_wsgi File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/werkzeug/serving.py", line 379 in handle_one_request File "/usr/lib/python3.7/http/server.py", line 426 in handle File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/werkzeug/serving.py", line 345 in handle File "/usr/lib/python3.7/socketserver.py", line 720 in __init__ File "/usr/lib/python3.7/socketserver.py", line 360 in finish_request File "/usr/lib/python3.7/socketserver.py", line 650 in process_request_thread File "/usr/lib/python3.7/threading.py", line 865 in run File "/usr/lib/python3.7/threading.py", line 917 in _bootstrap_inner File "/usr/lib/python3.7/threading.py", line 885 in _bootstrap Thread 0xa14f9460 (most recent call first): File "/usr/lib/python3.7/threading.py", line 148 in acquire File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/sync/lock.py", line 76 in acquire File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/sync/lock.py", line 140 in <genexpr> File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/sync/lock.py", line 140 in acquire File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/sync/lock.py", line 151 in __enter__ File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/microscope.py", line 244 in read_settings File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/api/v2/views/instrument.py", line 17 in get File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/views/__init__.py", line 235 in dispatch_request File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/views.py", line 89 in view File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/app.py", line 1936 in dispatch_request File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/app.py", line 1950 in full_dispatch_request File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/app.py", line 2447 in wsgi_app File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/app.py", line 2464 in __call__ File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/werkzeug/serving.py", line 312 in execute File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/werkzeug/serving.py", line 323 in run_wsgi File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/werkzeug/serving.py", line 379 in handle_one_request File "/usr/lib/python3.7/http/server.py", line 426 in handle File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/werkzeug/serving.py", line 345 in handle File "/usr/lib/python3.7/socketserver.py", line 720 in __init__ File "/usr/lib/python3.7/socketserver.py", line 360 in finish_request File "/usr/lib/python3.7/socketserver.py", line 650 in process_request_thread File "/usr/lib/python3.7/threading.py", line 865 in run File "/usr/lib/python3.7/threading.py", line 917 in _bootstrap_inner File "/usr/lib/python3.7/threading.py", line 885 in _bootstrap Thread 0xa24fb460 (most recent call first): File "/usr/lib/python3.7/threading.py", line 148 in acquire File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/sync/lock.py", line 76 in acquire File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/sync/lock.py", line 140 in <genexpr> File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/sync/lock.py", line 140 in acquire File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/sync/lock.py", line 151 in __enter__ File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/microscope.py", line 191 in state File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/api/v2/views/instrument.py", line 91 in get File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/views/__init__.py", line 84 in dispatch_request File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/views.py", line 89 in view File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/app.py", line 1936 in dispatch_request File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/app.py", line 1950 in full_dispatch_request File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/app.py", line 2447 in wsgi_app File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/app.py", line 2464 in __call__ File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/werkzeug/serving.py", line 312 in execute File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/werkzeug/serving.py", line 323 in run_wsgi File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/werkzeug/serving.py", line 379 in handle_one_request File "/usr/lib/python3.7/http/server.py", line 426 in handle File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/werkzeug/serving.py", line 345 in handle File "/usr/lib/python3.7/socketserver.py", line 720 in __init__ File "/usr/lib/python3.7/socketserver.py", line 360 in finish_request File "/usr/lib/python3.7/socketserver.py", line 650 in process_request_thread File "/usr/lib/python3.7/threading.py", line 865 in run File "/usr/lib/python3.7/threading.py", line 917 in _bootstrap_inner File "/usr/lib/python3.7/threading.py", line 885 in _bootstrap Thread 0x9bd64460 (most recent call first): File "/usr/lib/python3.7/threading.py", line 148 in acquire File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/sync/lock.py", line 76 in acquire File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/sync/lock.py", line 53 in __call__ File "/usr/lib/python3.7/contextlib.py", line 112 in __enter__ File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/camera/pi.py", line 349 in stop_preview File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/api/v2/views/actions/camera.py", line 147 in post File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/ctx.py", line 158 in wrapper File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/actions/thread.py", line 211 in wrapped File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/actions/thread.py", line 180 in run File "/usr/lib/python3.7/threading.py", line 917 in _bootstrap_inner File "/usr/lib/python3.7/threading.py", line 885 in _bootstrap Thread 0x9c565460 (most recent call first): File "/usr/lib/python3.7/threading.py", line 148 in acquire File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/sync/lock.py", line 76 in acquire File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/sync/lock.py", line 53 in __call__ File "/usr/lib/python3.7/contextlib.py", line 112 in __enter__ File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/camera/pi.py", line 349 in stop_preview File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/api/v2/views/actions/camera.py", line 147 in post File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/ctx.py", line 158 in wrapper File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/actions/thread.py", line 211 in wrapped File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/actions/thread.py", line 180 in run File "/usr/lib/python3.7/threading.py", line 917 in _bootstrap_inner File "/usr/lib/python3.7/threading.py", line 885 in _bootstrap Thread 0xa2cfc460 (most recent call first): File "/usr/lib/python3.7/threading.py", line 148 in acquire File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/sync/lock.py", line 76 in acquire File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/sync/lock.py", line 140 in <genexpr> File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/sync/lock.py", line 140 in acquire File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/sync/lock.py", line 151 in __enter__ File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/microscope.py", line 244 in read_settings File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/api/v2/views/instrument.py", line 47 in get File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/views/__init__.py", line 84 in dispatch_request File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/views.py", line 89 in view File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/app.py", line 1936 in dispatch_request File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/app.py", line 1950 in full_dispatch_request File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/app.py", line 2447 in wsgi_app File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/app.py", line 2464 in __call__ File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/werkzeug/serving.py", line 312 in execute File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/werkzeug/serving.py", line 323 in run_wsgi File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/werkzeug/serving.py", line 379 in handle_one_request File "/usr/lib/python3.7/http/server.py", line 426 in handle File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/werkzeug/serving.py", line 345 in handle File "/usr/lib/python3.7/socketserver.py", line 720 in __init__ File "/usr/lib/python3.7/socketserver.py", line 360 in finish_request File "/usr/lib/python3.7/socketserver.py", line 650 in process_request_thread File "/usr/lib/python3.7/threading.py", line 865 in run File "/usr/lib/python3.7/threading.py", line 917 in _bootstrap_inner File "/usr/lib/python3.7/threading.py", line 885 in _bootstrap Thread 0xa4e7e460 (most recent call first): File "/usr/lib/python3.7/threading.py", line 148 in acquire File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/sync/lock.py", line 76 in acquire File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/sync/lock.py", line 53 in __call__ File "/usr/lib/python3.7/contextlib.py", line 112 in __enter__ File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/camera/pi.py", line 349 in stop_preview File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/api/v2/views/actions/camera.py", line 147 in post File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/ctx.py", line 158 in wrapper File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/actions/thread.py", line 211 in wrapped File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/actions/thread.py", line 180 in run File "/usr/lib/python3.7/threading.py", line 917 in _bootstrap_inner File "/usr/lib/python3.7/threading.py", line 885 in _bootstrap Current thread 0xa58ff460 (most recent call first): File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/picamerax/vcsmobj.py", line 142 in __init__ File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/picamerax/camera.py", line 2535 in _upload_lens_shading_table File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/picamerax/camera.py", line 2279 in _configure_camera File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/picamerax/camera.py", line 2765 in _set_resolution File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/camera/pi.py", line 437 in stop_stream_recording File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/camera/pi.py", line 524 in capture File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/microscope.py", line 393 in capture File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/api/default_extensions/scan.py", line 108 in capture File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/api/default_extensions/scan.py", line 303 in stack File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/api/default_extensions/scan.py", line 247 in tile File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/api/default_extensions/scan.py", line 380 in post File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/webargs/core.py", line 370 in wrapper File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/flask/ctx.py", line 158 in wrapper File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/actions/thread.py", line 211 in wrapped File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/actions/thread.py", line 180 in run File "/usr/lib/python3.7/threading.py", line 917 in _bootstrap_inner File "/usr/lib/python3.7/threading.py", line 885 in _bootstrap Thread 0xa34fd460 (most recent call first): File "/usr/lib/python3.7/threading.py", line 300 in wait File "/usr/lib/python3.7/threading.py", line 552 in wait File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/sync/event.py", line 33 in wait File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/camera/base.py", line 123 in get_frame File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/api/utilities/__init__.py", line 79 in gen File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/werkzeug/wrappers/base_response.py", line 45 in _iter_encoded File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/werkzeug/wsgi.py", line 506 in __next__ File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/werkzeug/serving.py", line 314 in execute File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/werkzeug/serving.py", line 323 in run_wsgi File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/werkzeug/serving.py", line 379 in handle_one_request File "/usr/lib/python3.7/http/server.py", line 426 in handle File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/werkzeug/serving.py", line 345 in handle File "/usr/lib/python3.7/socketserver.py", line 720 in __init__ File "/usr/lib/python3.7/socketserver.py", line 360 in finish_request File "/usr/lib/python3.7/socketserver.py", line 650 in process_request_thread File "/usr/lib/python3.7/threading.py", line 865 in run File "/usr/lib/python3.7/threading.py", line 917 in _bootstrap_inner File "/usr/lib/python3.7/threading.py", line 885 in _bootstrap Thread 0xa62ff460 (most recent call first): File "/usr/lib/python3.7/threading.py", line 300 in wait File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/zeroconf/__init__.py", line 1476 in run File "/usr/lib/python3.7/threading.py", line 917 in _bootstrap_inner File "/usr/lib/python3.7/threading.py", line 885 in _bootstrap Thread 0xa6c59460 (most recent call first): File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/zeroconf/__init__.py", line 1350 in run File "/usr/lib/python3.7/threading.py", line 917 in _bootstrap_inner File "/usr/lib/python3.7/threading.py", line 885 in _bootstrap Thread 0xb04f9460 (most recent call first): File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/camera/pi.py", line 657 in frames File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/camera/base.py", line 141 in _thread File "/usr/lib/python3.7/threading.py", line 865 in run File "/usr/lib/python3.7/threading.py", line 917 in _bootstrap_inner File "/usr/lib/python3.7/threading.py", line 885 in _bootstrap Thread 0xb6facad0 (most recent call first): File "/usr/lib/python3.7/selectors.py", line 415 in select File "/usr/lib/python3.7/socketserver.py", line 232 in serve_forever File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/werkzeug/serving.py", line 777 in serve_forever File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/werkzeug/serving.py", line 1009 in inner File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/werkzeug/serving.py", line 1052 in run_simple File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/wsgi.py", line 95 in start File "/var/openflexure/application/openflexure-microscope-server/.venv/lib/python3.7/site-packages/labthings/wsgi.py", line 131 in run File "/var/openflexure/application/openflexure-microscope-server/openflexure_microscope/api/app.py", line 209 in <module> File "/usr/lib/python3.7/runpy.py", line 85 in _run_code File "/usr/lib/python3.7/runpy.py", line 193 in _run_module_as_main Segmentation fault ``` /cc @jtc42