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<base href="https://bugs.webkit.org/" />
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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 - CrashOnOverflow in JSC::Yarr::YarrPatternConstructor::setupAlternativeOffsets"
href="https://bugs.webkit.org/show_bug.cgi?id=159954">159954</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>CrashOnOverflow in JSC::Yarr::YarrPatternConstructor::setupAlternativeOffsets
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>Product</th>
<td>WebKit
</td>
</tr>
<tr>
<th>Version</th>
<td>WebKit Nightly 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@lists.webkit.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>msaboff@apple.com
</td>
</tr></table>
<p>
<div>
<pre>We are failing on regular expressions that exceed 2^32 characters. For example:
/a{2147483649,2147483650}a{2147483649,2147483650}/
Backtraces look something like:
#0 0x10a0d2cb8 in WTFCrash (JavaScriptCore+0x2a87cb8)
#1 0x10766291d in WTF::CrashOnOverflow::crash() (JavaScriptCore+0x1791d)
#2 0x1076628bd in WTF::CrashOnOverflow::overflowed() (JavaScriptCore+0x178bd)
#3 0x10a0ab684 in WTF::Checked<unsigned int, WTF::CrashOnOverflow> const WTF::Checked<unsigned int, WTF::CrashOnOverflow>::operator+=<unsigned int>(unsigned int) (JavaScriptCore+0x2a60684)
#4 0x10a0ab0b0 in WTF::Checked<unsigned int, WTF::CrashOnOverflow> const WTF::Checked<unsigned int, WTF::CrashOnOverflow>::operator+=<unsigned int, WTF::CrashOnOverflow>(WTF::Checked<unsigned int, WTF::CrashOnOverflow>) (JavaScriptCore+0x2a600b0)
#5 0x10a0a9f6a in JSC::Yarr::YarrPatternConstructor::setupAlternativeOffsets(JSC::Yarr::PatternAlternative*, unsigned int, unsigned int, unsigned int&) (JavaScriptCore+0x2a5ef6a)
#6 0x10a0a8035 in JSC::Yarr::YarrPatternConstructor::setupDisjunctionOffsets(JSC::Yarr::PatternDisjunction*, unsigned int, unsigned int, unsigned int&) (JavaScriptCore+0x2a5d035)
#7 0x10a0aa835 in JSC::Yarr::YarrPatternConstructor::setupAlternativeOffsets(JSC::Yarr::PatternAlternative*, unsigned int, unsigned int, unsigned int&) (JavaScriptCore+0x2a5f835)
#8 0x10a0a8035 in JSC::Yarr::YarrPatternConstructor::setupDisjunctionOffsets(JSC::Yarr::PatternDisjunction*, unsigned int, unsigned int, unsigned int&) (JavaScriptCore+0x2a5d035)
#9 0x10a09d9f2 in JSC::Yarr::YarrPatternConstructor::setupOffsets() (JavaScriptCore+0x2a529f2)
#10 0x10a09ba89 in JSC::Yarr::YarrPattern::compile(WTF::String const&, void*) (JavaScriptCore+0x2a50a89)
...</pre>
</div>
</p>
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