cirq-web shows a blank window for circuits with no-target operations #5172
Description
It would be reasonable to ignore no-target operations, as they are usually some sort of unobservable annotation. But currently cirq-web crashes instead.
Run this python code and then open the generated page and look at the browser console:
import stim
import stimcirq
import cirq_web
stim_circuit = stim.Circuit("""
QUBIT_COORDS(0, 0) 0
M 0
DETECTOR rec[-1]
""")
cirq_circuit = stimcirq.stim_circuit_to_cirq_circuit(stim_circuit)
cirq_web.Circuit3D(cirq_circuit).generate_html_file(
file_name="stim_circuit_viewer.html",
open_in_browser=True,
)
The python code succeeds, but the browser console says:
Uncaught TypeError: Cannot read properties of undefined (reading 'row')
at stim_circuit_viewer.html:5:625129
at Array.forEach (<anonymous>)
at s.buildAndAddMeshesToGroup (stim_circuit_viewer.html:5:624903)
at new s (stim_circuit_viewer.html:5:624781)
at addSymbol (stim_circuit_viewer.html:5:625961)
at new a (stim_circuit_viewer.html:5:625922)
at t.createGridCircuit (stim_circuit_viewer.html:5:629078)
at stim_circuit_viewer.html:9:56
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