[Webkit-unassigned] [Bug 152775] New: Modern IDB: storage/indexeddb/transaction-scope-sequencing.html fails

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=152775

            Bug ID: 152775
           Summary: Modern IDB:
                    storage/indexeddb/transaction-scope-sequencing.html
                    fails
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: beidson at apple.com

Modern IDB: storage/indexeddb/transaction-scope-sequencing.html fails

The test is sound, and Modern IDB's transaction scheduler is non-complaint.

tx1 blocks tx2, and tx2 blocks tx3.

Our scheduler starts tx1, then sees that tx2 is blocked so it passes over it. It then sees that tx3 is *not* blocked by in-progress tx1, so it starts tx3.

But the spec actually says any previous transaction that overlaps with your scope must run to completion before you get to run.

So because tx3 is blocked by tx2, it can't run until tx2 finishes. Which means tx3 is implicitly blocked by tx1.

The fix will be easy.

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