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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Writing WASM obj file with debug information fails at writeObject"
href="https://bugs.llvm.org/show_bug.cgi?id=37409">37409</a>
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<th>Summary</th>
<td>Writing WASM obj file with debug information fails at writeObject
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Backend: WebAssembly
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>ydelendik@mozilla.com
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<p>
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<pre>Created <span class=""><a href="attachment.cgi?id=20288" name="attach_20288" title="minimal test case">attachment 20288</a> <a href="attachment.cgi?id=20288&action=edit" title="minimal test case">[details]</a></span>
minimal test case
llc fails at assert:
```
Assertion failed: (WasmIndices.count(&WS) > 0), function writeObject, file
/Users/yury/llvmwasm/llvm/lib/MC/WasmObjectWriter.cpp, line 1363
```
the test case can be run via `llc -- -filetype=obj fail-writeObject.ll`
the test case produced by clang from:
```
// clang-7.0 --target=wasm32-unknown-unknown-wasm -g -c fail-writeObject.c
static void *foo(void *p){}
int bar() {
unknown(foo);
}
```</pre>
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