rega, row 43 case 3 at 52eeb0db: the coalescing landed — one event per click,
exactly as intended — and in 3 of 4 runs that one event was EMPTY,
{language:"", languageCode:"", languageCodes:[]}, so the grid stayed at 2,107.
The name fix works whenever it fires; the event just carried nothing to name.
THE CASCADE PASSES THROUGH A CLEARED STATE. mapStore.selectLanguage() sets
selectedDialect = null BEFORE it sets the language, so a dialect click walks the
store through "nothing selected" on its way to the answer. The settle timer fired
inside that window and read exactly what was there. The composite then did the
right thing with what it was told: an all-empty report IS how this element says
"the reader cleared everything".
MY FIRST FIX WAS A TIMEOUT, AND A TIMEOUT WAS THE WRONG KIND OF ANSWER. 60ms was
enough in my seat and not under headless swiftshader. That is the third time I
have tuned a duration on one machine and called it settled, so this one does not
get lengthened — lengthening moves the failure rather than removing it.
The guard is SEMANTIC instead. An all-empty read arriving straight after a filled
one is the one genuinely ambiguous case — it is what a mid-cascade read looks
like AND what a real clear looks like, and nothing in the payload separates them.
So it is re-taken rather than believed: the transient fills in and is reported
correctly, while a real clear stays empty through every re-take and is reported a
few tens of ms later, which no reader can perceive. The re-takes are BOUNDED
(3 x 60ms) so a clear can only ever be delayed, never swallowed, and the whole
budget stays far below the composite's 1.2s push window so the two cannot
collide. The budget resets on every fresh user action.
Note what is NOT assumed: the retries re-read the store on their own timer rather
than waiting for another watcher fire. In the failing runs the watcher fired only
ONCE, so a fix that depended on a second fire would not have worked.
check:language-code-link grows a section G for it, asserting both halves — the
guard exists, and it is bounded. Without the first the transient ships; without
the second a clear can never be reported at all. Both negative-tested.
Source only. STUDIO: needs a rebuild of doxa-research-map.
c53d356d3f