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            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - storage/indexeddb/intversion-open-in-upgradeneeded.html is flaky on mac"
   href="https://bugs.webkit.org/show_bug.cgi?id=155050#c12">Comment # 12</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - storage/indexeddb/intversion-open-in-upgradeneeded.html is flaky on mac"
   href="https://bugs.webkit.org/show_bug.cgi?id=155050">bug 155050</a>
              from <span class="vcard"><a class="email" href="mailto:beidson&#64;apple.com" title="Brady Eidson &lt;beidson&#64;apple.com&gt;"> <span class="fn">Brady Eidson</span></a>
</span></b>
        <pre>A few things I can see:

WK1-mac is, apparently, working great.

Release builds sometimes fail with text differences, but never crash
Debug builds &quot;crash&quot; - They're all asserts.

Example assert:

No crash log found for com.apple.WebKit.Databases.Development:81065.

stdout:

stderr:
ASSERTION FAILED: !m_db.m_transactionInProgress
/Volumes/Data/slave/yosemite-debug/build/Source/WebCore/platform/sql/SQLiteTransaction.cpp(53) : void WebCore::SQLiteTransaction::begin()
1   0x105e99b60 WTFCrash
2   0x10a2a01f8 WebCore::SQLiteTransaction::begin()
3   0x10a29656e WebCore::IDBServer::SQLiteIDBTransaction::begin(WebCore::SQLiteDatabase&amp;)
4   0x10a27d5ac WebCore::IDBServer::SQLiteIDBBackingStore::beginTransaction(WebCore::IDBTransactionInfo const&amp;)
5   0x10a5cfb15 WebCore::IDBServer::UniqueIDBDatabase::beginTransactionInBackingStore(WebCore::IDBTransactionInfo const&amp;)
6   0x10a61ea5f WebCore::CrossThreadTaskImpl&lt;WebCore::IDBServer::UniqueIDBDatabase, WebCore::IDBTransactionInfo const&amp;&gt;::CrossThreadTaskImpl(WebCore::IDBServer::UniqueIDBDatabase*, void (WebCore::IDBServer::UniqueIDBDatabase::*)(WebCore::IDBTransactionInfo const&amp;), WebCore::IDBTransactionInfo const&amp;)::'lambda'()::operator()() const
7   0x10a61e9cc std::__1::__function::__func&lt;WebCore::CrossThreadTaskImpl&lt;WebCore::IDBServer::UniqueIDBDatabase, WebCore::IDBTransactionInfo const&amp;&gt;::CrossThreadTaskImpl(WebCore::IDBServer::UniqueIDBDatabase*, void (WebCore::IDBServer::UniqueIDBDatabase::*)(WebCore::IDBTransactionInfo const&amp;), WebCore::IDBTransactionInfo const&amp;)::'lambda'(), std::__1::allocator&lt;WebCore::CrossThreadTaskImpl&lt;WebCore::IDBServer::UniqueIDBDatabase, WebCore::IDBTransactionInfo const&amp;&gt;::CrossThreadTaskImpl(WebCore::IDBServer::UniqueIDBDatabase*, void (WebCore::IDBServer::UniqueIDBDatabase::*)(WebCore::IDBTransactionInfo const&amp;), WebCore::IDBTransactionInfo const&amp;)::'lambda'()&gt;, void ()&gt;::operator()()
8   0x10818103a std::__1::function&lt;void ()&gt;::operator()() const
9   0x108f2d125 WebCore::CrossThreadTask::performTask()
10  0x108f2a7a3 WebCore::IDBServer::IDBServer::databaseRunLoop()
11  0x108f27e14 WebCore::IDBServer::IDBServer::databaseThreadEntry(void*)
12  0x105f03379 WTF::createThread(void (*)(void*), void*, char const*)::$_0::operator()() const
13  0x105f0334c std::__1::__function::__func&lt;WTF::createThread(void (*)(void*), void*, char const*)::$_0, std::__1::allocator&lt;WTF::createThread(void (*)(void*), void*, char const*)::$_0&gt;, void ()&gt;::operator()()
14  0x10578184a std::__1::function&lt;void ()&gt;::operator()() const
15  0x105f0209e WTF::threadEntryPoint(void*)
16  0x105f03901 WTF::wtfThreadEntryPoint(void*)
17  0x7fff9441b05a _pthread_body
18  0x7fff9441afd7 _pthread_body
19  0x7fff944183ed thread_start

-Windows WK1 debug is seeing the crashes too, but I can't get windows crash logs.</pre>
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