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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - struct DefinitionData &clang::CXXRecordDecl::data() const: Assertion `DD && "queried property of class with no definition"' failed"
href="https://bugs.llvm.org/show_bug.cgi?id=48307">48307</a>
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<th>Summary</th>
<td>struct DefinitionData &clang::CXXRecordDecl::data() const: Assertion `DD && "queried property of class with no definition"' failed
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>C++
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>chenyang@cs.utah.edu
</td>
</tr>
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<th>CC</th>
<td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<pre>The following code triggered an assertion failure. It might be a dup of bug
12777.
$ cat foo.cc
namespace NS {
template<typename T> struct S {
struct S1;
struct S2;
struct S3 : public S1, public S2 {};
};
}
$ clang -v
clang version 12.0.0 (<a href="https://github.com/llvm/llvm-project.git">https://github.com/llvm/llvm-project.git</a>
75f50e15bf8fff6fba1d4678adedd33ef6a945e5)
Target: x86_64-unknown-linux-gnu
Thread model: posix
$ clang -c foo.cc
clang:
/backup/work/compilers/compiler-source/llvm-project/clang/include/clang/AST/DeclCXX.h:434:
struct DefinitionData &clang::CXXRecordDecl::data() const: Assertion `DD &&
"queried property of class with no definition"' failed.
PLEASE submit a bug report to <a href="https://bugs.llvm.org/">https://bugs.llvm.org/</a> and include the crash
backtrace, preprocessed source, and associated run script.
Stack dump:
0. Program arguments:
/backup/work/compilers/compiler-install/llvm-12.0.0-dev/bin/clang -c foo.cc
1. foo.cc:5:36: current parser token '{'
2. foo.cc:1:1: parsing namespace 'NS'
3. foo.cc:2:22: parsing struct/union/class body 'NS::S'
4. foo.cc:5:3: parsing struct/union/class body 'NS::S::S3'
...</pre>
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