225947 2021-05-18 17:44:43 -0700 Web Inspector: Uncaught exception: Page.setShowRulers' was not found when starting remote inspection 2021-05-18 17:45:09 -0700 1 1 1 Unclassified WebKit Web Inspector WebKit Nightly Build All All NEW InRadar P2 Normal --- 1 pangle webkit-unassigned inspector-bugzilla-changes pangle webkit-bug-importer oldest_to_newest 1761397 0 pangle 2021-05-18 17:44:43 -0700 It looks like we aren't checking for Page.setShowRulers somewhere in the frontend, and since iOS doesn't support rulers, this fails. The Rulers button also appears in the Elements Tab, even though it doesn't do anything. ``` 'Page.setShowRulers' was not found (at Connection.js:​162:​29)​ _dispatchResponseToPromise @ Connection.js:​162:​29 _dispatchResponse @ Connection.js:​124:​44 dispatch @ Connection.js:​77:​35 dispatchMessageFromTarget @ TargetManager.js:​176:​39 dispatchMessageFromTarget @ TargetObserver.js:​47:​51 _dispatchEvent @ Connection.js:​210:​26 dispatch @ Connection.js:​79:​32 dispatch @ InspectorBackend.js:​232:​52 ?​ @ MessageDispatcher.js:​42:​34 ``` 1761399 1 webkit-bug-importer 2021-05-18 17:44:56 -0700 <rdar://problem/78182057>