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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - JSExport protocol with an NSInteger property converts negative values to 18446744073709552000"
href="https://bugs.webkit.org/show_bug.cgi?id=145563">145563</a>
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<th>Summary</th>
<td>JSExport protocol with an NSInteger property converts negative values to 18446744073709552000
</td>
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<th>Classification</th>
<td>Unclassified
</td>
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<th>Product</th>
<td>WebKit
</td>
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<th>Version</th>
<td>528+ (Nightly build)
</td>
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<th>Hardware</th>
<td>Unspecified
</td>
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<th>OS</th>
<td>Unspecified
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>Normal
</td>
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<th>Priority</th>
<td>P2
</td>
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<th>Component</th>
<td>JavaScriptCore
</td>
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
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<th>Reporter</th>
<td>keith_miller@apple.com
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<pre>Steps to Reproduce:
My code roughly looks like:
@protocol XXThingExports <JSExport>
@property (nonatomic) NSInteger level;
@end
@interface XXThing : NSObject <XXThingExports>
@property (nonatomic) NSInteger level;
@end
1. From Objective-C, set `level` to a negative value like -46.
2. Accessing the `level` property of an XXThing object from JavaScript gives 18446744073709552000.
Expected Results:
thing.level should be -46
Actual Results:
thing.level is 18446744073709552000</pre>
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