Maximum recursion depth exceeded after fixpoint simulation

[chipmuenk]

A RecursionError: maximum recursion depth exceeded occurs when changing coefficient width in the Fixpoint Tab and immediately switching to the b,a tab:

[WARNING] [pyfda.plot_widgets.plot_impz:176] Stopped infinite loop: sender : pyfda.plot_widgets.plot_impz fx_sim : finish

This might be a race condition, I think it only happens when fixpoint simulation is still running (h[n]) tab has to be open).

To reproduce:

• Open Tab Fixpoint and Tab h[n]
• Select FIR_DF or DELAY fixpoint filter
• Switch h[n] to fixpoint simulation
• Edit any of the fixpoint settings
• Click on the b,a tab

BOOM!

[chipmuenk]

Fixed for v0.3.0