Check requested message before trying callbacks #14
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Hi,
I encountered this while working on #13.
Here is an example program to reproduce it: https://gist.github.com/BrechtSerckx/e682a30fb946292be58ab2be64ed49e3.
When no feedback handler is registered, calls to
getFeedback
fail. When a feedback handler is registered, calls still fail, but the callback is called.getFeedback
should not conflict with registered callbacks.This patch first checks if a CAN message has been requested. Only if it wasn't, the callback handlers are checked.