<html>
<head>
<base href="http://llvm.org/bugs/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - YAML IO crashes in Input::beginMapping() when trying to read from an empty string"
href="http://llvm.org/bugs/show_bug.cgi?id=15927">15927</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>YAML IO crashes in Input::beginMapping() when trying to read from an empty string
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>new bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>alexfh@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>The code to reproduce this is:
#include "llvm/Support/YAMLTraits.h"
struct T { int a; };
namespace llvm {
namespace yaml {
template <> struct MappingTraits<T> {
static void mapping(llvm::yaml::IO &IO, T &T) {
IO.mapOptional("a", T.a);
}
};
}
}
int main(int argc, const char **argv) {
llvm::yaml::Input Input("");
T T;
Input >> T;
return 0;
}
-----------------
$ ./test
test: llvm/include/llvm/Support/Casting.h:97: static bool
llvm::isa_impl_cl<llvm::yaml::Input::MapHNode, const llvm::yaml::Input::HNode
*>::doit(const From *) [To = llvm::yaml::Input::MapHNode, From = const
llvm::yaml::Input::HNode *]: Assertion `Val && "isa<> used on a null pointer"'
failed.
Aborted (core dumped)
The problem is in the line 88 of lib/Support/YAMLTraits.cpp:
88 MapHNode *MN = dyn_cast<MapHNode>(CurrentNode);</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>