CT: reentry detected (SliderTrack)

[pixelzoom]

Reported for geometric-optics-basics, but would presumably be an issue in geometric-optics too.

geometric-optics-basics : multitouch-fuzz : unbuilt
https://bayes.colorado.edu/continuous-testing/ct-snapshots/1649933219440/geometric-optics-basics/geometric-optics-basics_en.html?continuousTest=%7B%22test%22%3A%5B%22geometric-optics-basics%22%2C%22multitouch-fuzz%22%2C%22unbuilt%22%5D%2C%22snapshotName%22%3A%22snapshot-1649933219440%22%2C%22timestamp%22%3A1649946409833%7D&brand=phet&ea&fuzz&fuzzPointers=2&memoryLimit=1000&supportsPanAndZoom=false
Query: brand=phet&ea&fuzz&fuzzPointers=2&memoryLimit=1000&supportsPanAndZoom=false
Uncaught Error: Assertion failed: reentry detected, value=40, oldValue=120
Error: Assertion failed: reentry detected, value=40, oldValue=120
at window.assertions.assertFunction (https://bayes.colorado.edu/continuous-testing/ct-snapshots/1649933219440/assert/js/assert.js:25:13)
at assert (Property.ts:273:14)
at _notifyListeners (Property.ts:208:13)
at set (SliderTrack.ts:103:20)
at handleTrackEvent (SliderTrack.ts:125:8)
at _dragListener (PressListener.ts:526:9)
at call (DragListener.ts:307:35)
at apply (PhetioAction.ts:123:16)
at execute (DragListener.ts:458:21)
at drag (PressListener.ts:895:13)
id: Bayes Chrome
Snapshot from 4/14/2022, 4:46:59 AM

I was unable to reproduce locally with:
?phet&ea&fuzz&fuzzPointers=2&memoryLimit=1000&supportsPanAndZoom=false
... and in case it was related to the Focal Length slider, which is difficult for CT to reach:
?phet&ea&fuzz&fuzzPointers=2&memoryLimit=1000&supportsPanAndZoom=false&focalLengthControl=direct

Unfortunately the stack trace isn't specific, so I can't tell which of the 4 SliderTrack-related Properties experienced the problem. Since this test is multitouch-fuzz, my hypothesis is that there was a press in the slider track while the thumb was being dragged (or visa versa).

This is not a blocking issue, because it wouldn't cause a problem in practice.

[pixelzoom]

... my hypothesis is that there was a press in the slider track while the thumb was being dragged (or visa versa).

I tested this hypothesis with a tethered iPad6, and could not reproduce the problem.

[KatieWoe]

Closing for phetsims/qa#832. Feel free to reopen if this is in error.

[pixelzoom]

Reopening. Please keep this open.

[pixelzoom]

It is not necessary to address this for #278, the 1.3 PhET-iO release.

[pixelzoom]

Closing. This seems to have been addressed elsewhere, and hasn't occurred in a long long time.