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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Assertion failure when initializing Intl prototypes"
   href="https://bugs.webkit.org/show_bug.cgi?id=158790">158790</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Assertion failure when initializing Intl prototypes
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>WebKit
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>WebKit Local Build
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>Normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P2
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>JavaScriptCore
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>webkit-unassigned&#64;lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>andre.bargull&#64;gmail.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>SVN: rev202088
Build with: perl Tools/Scripts/build-jsc --gtk --debug


The following test case triggers this assertion error:
---
ASSERTION FAILED: !state.hadException()
---


Test case:
---
Object.prototype.localeMatcher = &quot;invalid&quot;;
Intl.NumberFormat.prototype.resolvedOptions();
---


Stack trace:
---
#0  0x00007ffff6de7098 in WTFCrash () at ../../Source/WTF/wtf/Assertions.cpp:317
#1  0x00007ffff6b837b8 in JSC::IntlNumberFormat::resolvedOptions (this=0x7fffaf1e3eb0, state=...) at ../../Source/JavaScriptCore/runtime/IntlNumberFormat.cpp:492
#2  0x00007ffff6b85d5f in JSC::IntlNumberFormatPrototypeFuncResolvedOptions (state=0x7fffffffcb40)
    at ../../Source/JavaScriptCore/runtime/IntlNumberFormatPrototype.cpp:149
#3  0x00007fffb0bff028 in ?? ()
#4  0x00007fffffffcba0 in ?? ()
#5  0x00007ffff69f26a1 in llint_entry () at ../../Source/WTF/wtf/RefPtr.h:79
---


Similar issues can be reproduced with:
---
Object.prototype.localeMatcher = &quot;invalid&quot;; 
Intl.NumberFormat.prototype.format(0);
---

And:
---
Object.prototype.localeMatcher = &quot;invalid&quot;; 
Intl.Collator.prototype.resolvedOptions();
---

And:
---
Object.prototype.localeMatcher = &quot;invalid&quot;;
Intl.Collator.prototype.compare();
---</pre>
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