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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - ICE/Segfault when parsing incorrect template arguments of nested classes, OS X only?"
href="https://bugs.llvm.org/show_bug.cgi?id=40374">40374</a>
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<th>Summary</th>
<td>ICE/Segfault when parsing incorrect template arguments of nested classes, OS X only?
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>7.0
</td>
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<th>Hardware</th>
<td>Macintosh
</td>
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<th>OS</th>
<td>MacOS X
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>-New Bugs
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>markus@dreseler.de
</td>
</tr>
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<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=21354" name="attach_21354" title="Crash info">attachment 21354</a> <a href="attachment.cgi?id=21354&action=edit" title="Crash info">[details]</a></span>
Crash info
The following code leads to an ICE:
#include <type_traits>
class JoinHash {};
template <typename LeftType, typename = std::enable_if_t<bool>
class JoinHash::JoinHashImpl {};
Error:
1. clangice.cpp:6:30: current parser token '{'
0 clang-7 0x000000010a9e2356
llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 37
1 clang-7 0x000000010a9e274e SignalHandler(int) + 192
2 libsystem_platform.dylib 0x00007fff6e56ab3d _sigtramp + 29
3 libsystem_platform.dylib 0x00007ffee61e1597 _sigtramp + 2009557623
4 clang-7 0x000000010bc0dbf6 clang::TypeLoc::getBeginLoc()
const + 118
5 clang-7 0x000000010bbd3437
clang::NestedNameSpecifierLoc::getLocalSourceRange() const + 143
6 clang-7 0x000000010b62698d
clang::CXXScopeSpec::getLastQualifierNameLoc() const + 37
[...]
Interestingly, this happens *after* the correct error message is printed. Also,
I am unable to reproduce it on Godbolt or my Linux machines.
clang version 7.0.0 (tags/RELEASE_700/final)
Target: x86_64-apple-darwin18.2.0
Thread model: posix
InstalledDir: /usr/local/opt/llvm/bin
(Installed via brew)</pre>
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