[Webkit-unassigned] [Bug 189440] New: ASSERTION FAILED: overwriteExistingItem == OverwriteExistingItem::Yes || !idToHistoryItemMap().contains(itemID) in WebBackForwardListProxy::addItemFromUIProcess()

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=189440

            Bug ID: 189440
           Summary: ASSERTION FAILED: overwriteExistingItem ==
                    OverwriteExistingItem::Yes ||
                    !idToHistoryItemMap().contains(itemID) in
                    WebBackForwardListProxy::addItemFromUIProcess()
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: iPhone / iPad
                OS: iOS 11
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit2
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: dbates at webkit.org
                CC: beidson at apple.com, cdumez at apple.com

Seen using a debug build of WebKit for iOS Simulator at r235759.

Steps to reproduce:

1. Open an iPad simulator instance.
2. Visit <https://www.icloud.com>.
3. Tap the share button. Then tap Request Desktop Site from the share sheet.
4. Sign in to iCloud.
5. Tap Pages.
6. Tap the + icon at the top of the page to open the template chooser.
7. Press the return key on the keyboard.

The the WebProcess crashes because ASSERT_UNUSED(overwriteExistingItem, overwriteExistingItem == OverwriteExistingItem::Yes || !idToHistoryItemMap().contains(itemID)) fails in WebBackForwardListProxy::addItemFromUIProcess().

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