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Driver fail console message during update dependencies / rendering, appears to be working correctly though.
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Description

Blender Version
Broken: blender-2.80.0-git.bb2abacb4b5c

Exact steps for others to reproduce the error

Each one of my drivers is producing an error at each frame during rendering, or when I click Update Dependencies in the Driver Editor.

Here's a snippet of the log:

find_node_operation: Failed for (PARAMETERS_EXIT, '')
add_relation(ID Property -> Done) - Failed, but op_from (OperationKey(type: PARAMETERS, component name: '', operation code: ID_PROPERTY, 'top_lights')) was ok
add_relation(ID Property -> Done) - Could not find op_to (OperationKey(type: PARAMETERS, component name: '', operation code: PARAMETERS_EXIT))
find_node_operation: Failed for (PARAMETERS_EXIT, '')
add_relation(ID Property -> Done) - Failed, but op_from (OperationKey(type: PARAMETERS, component name: '', operation code: ID_PROPERTY, 'light.5')) was ok
add_relation(ID Property -> Done) - Could not find op_to (OperationKey(type: PARAMETERS, component name: '', operation code: PARAMETERS_EXIT))
find_node_operation: Failed for (PARAMETERS_EXIT, '')
add_relation(ID Property -> Done) - Failed, but op_from (OperationKey(type: PARAMETERS, component name: '', operation code: ID_PROPERTY, 'top_lights')) was ok
add_relation(ID Property -> Done) - Could not find op_to (OperationKey(type: PARAMETERS, component name: '', operation code: PARAMETERS_EXIT))
find_node_operation: Failed for (PARAMETERS_EXIT, '')

But as far as I can tell, the drivers are updating and the renderer is working correctly.

Here's an example file with lots of drivers set up:

Try clicking Update Dependencies in the Driver Editor or render a frame to trigger the messages.