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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - libclang crashes with segmentation fault with python bindings"
href="https://bugs.llvm.org/show_bug.cgi?id=34484">34484</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>libclang crashes with segmentation fault with python bindings
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
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<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>libclang
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>sagi@auroralabs.com
</td>
</tr>
<tr>
<th>CC</th>
<td>klimek@google.com, llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>The full description can be found here :
<a href="https://stackoverflow.com/questions/45901636/python-clang-crashes-with-segmentation-fault">https://stackoverflow.com/questions/45901636/python-clang-crashes-with-segmentation-fault</a>
While trying to traverse clang AST using python-clang bindings on bitcoin
opensource project. libclang crashes with segmentation fault.
At start I used libclang version 3.8 but it happens with versions 3.9, 4.0, 5.0
and 6.0 (6.0~svn312460-1~exp1)
backtrace :
#0 clang::TagType::getDecl (this=0x0) at
/build/llvm-toolchain-3.8-_PD09B/llvm-toolchain-3.8-3.8/tools/clang/lib/AST/Type.cpp:2962
#1 0x00007f9ecbe65caf in clang::RecordType::getDecl (this=<optimized out>) at
/build/llvm-toolchain-3.8-_PD09B/llvm-toolchain-3.8-3.8/tools/clang/include/clang/AST/Type.h:3554
#2 (anonymous namespace)::CXXNameMangler::mangleUnqualifiedName
(this=this@entry=0x7ffe35f45470, ND=ND@entry=0x7f9ec0092cc8, Name=...,
AdditionalAbiTags=AdditionalAbiTags@entry=0x7ffe35f453c0,
KnownArity=4294967295)
at
/build/llvm-toolchain-3.8-_PD09B/llvm-toolchain-3.8-3.8/tools/clang/lib/AST/ItaniumMangle.cpp:1184
#3 0x00007f9ecbe60250 in (anonymous
namespace)::CXXNameMangler::mangleUnqualifiedName
(AdditionalAbiTags=0x7ffe35f453c0, ND=<optimized out>, this=0x7ffe35f45470)
at
/build/llvm-toolchain-3.8-_PD09B/llvm-toolchain-3.8-3.8/tools/clang/lib/AST/ItaniumMangle.cpp:481
#4 (anonymous namespace)::CXXNameMangler::mangleLocalName
(this=this@entry=0x7ffe35f45470, D=D@entry=0x7f9ec0092cc8,
AdditionalAbiTags=AdditionalAbiTags@entry=0x7ffe35f453c0,
ExcludeUnqualifiedName=ExcludeUnqualifiedName@entry=false) at
/build/llvm-toolchain-3.8-_PD09B/llvm-toolchain-3.8-3.8/tools/clang/lib/AST/ItaniumMangle.cpp:1471
#5 0x00007f9ecbe607b7 in (anonymous
namespace)::CXXNameMangler::mangleNameWithAbiTags
(this=this@entry=0x7ffe35f45470, ND=ND@entry=0x7f9ec0092cc8,
AdditionalAbiTags=AdditionalAbiTags@entry=0x7ffe35f453c0,
ExcludeUnqualifiedName=ExcludeUnqualifiedName@entry=false)
at
/build/llvm-toolchain-3.8-_PD09B/llvm-toolchain-3.8-3.8/tools/clang/lib/AST/ItaniumMangle.cpp:801
#6 0x00007f9ecbe61621 in (anonymous namespace)::CXXNameMangler::mangleName
(this=0x7ffe35f45470, ND=0x7f9ec0092cc8, ExcludeUnqualifiedName=<optimized
out>)
at
/build/llvm-toolchain-3.8-_PD09B/llvm-toolchain-3.8-3.8/tools/clang/lib/AST/ItaniumMangle.cpp:776
#7 0x00007f9ecbe62822 in (anonymous
namespace)::ItaniumMangleContextImpl::mangleCXXName (this=<optimized out>,
D=0x7f9ec0092cc8, Out=...)
at
/build/llvm-toolchain-3.8-_PD09B/llvm-toolchain-3.8-3.8/tools/clang/lib/AST/ItaniumMangle.cpp:4422
#8 0x00007f9ecbd4df6b in clang_Cursor_getMangling (C=...) at
/build/llvm-toolchain-3.8-_PD09B/llvm-toolchain-3.8-3.8/tools/clang/tools/libclang/CIndex.cpp:3996
#9 0x00007f9eccbd2e40 in ffi_call_unix64 () from
/usr/lib/x86_64-linux-gnu/libffi.so.6
#10 0x00007f9eccbd28ab in ffi_call () from
/usr/lib/x86_64-linux-gnu/libffi.so.6</pre>
</div>
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