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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - DFG Validation fails when performing a concatenation with only a single entry"
href="https://bugs.webkit.org/show_bug.cgi?id=158699">158699</a>
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<th>Summary</th>
<td>DFG Validation fails when performing a concatenation with only a single entry
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<th>Classification</th>
<td>Unclassified
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<th>Product</th>
<td>WebKit
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<th>Version</th>
<td>WebKit Nightly Build
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<th>Hardware</th>
<td>Unspecified
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<th>OS</th>
<td>Unspecified
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<th>Status</th>
<td>NEW
</td>
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<th>Keywords</th>
<td>NeedsRadar
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<th>Severity</th>
<td>Normal
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<th>Priority</th>
<td>P2
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<th>Component</th>
<td>JavaScriptCore
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
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<th>Reporter</th>
<td>oliver@apple.com
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<th>CC</th>
<td>fpizlo@apple.com, sbarati@apple.com
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<p>
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<pre>Fairly simple failure:
function f() {
for (;;)`${1}`
}
f();
The issue is that we appear to be issuing a str_concat with a single child, which the DFG thinks is invalid. The obvious solutions are to either:
* don't emit str_concat from a single child template literal
* Have the DFG acknowledge this can happen
I think the former is the better option.</pre>
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