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<base href="https://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [mingw] unordered_map crashes clang with -O2 optimisation"
href="https://llvm.org/bugs/show_bug.cgi?id=25537">25537</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[mingw] unordered_map crashes clang with -O2 optimisation
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>3.7
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Windows NT
</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>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>vit9696@avp.su
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=15292" name="attach_15292" title="t-089b7b">attachment 15292</a> <a href="attachment.cgi?id=15292&action=edit" title="t-089b7b">[details]</a></span>
t-089b7b
Clang appears to badly dislike -O2 (and higher) when compiling code with
unordered_maps. My package manager is msys2 on Windows 8.1, and I do not have
debug symbols for the binary. Postprocessed code and expanded arguments are
included in the attachement. Could be a duplicate, but I failed to find any.
#include <unordered_map>
int main() {
std::unordered_map <int, int> m;
}
clang++ -c -std=c++11 -O2 t.cpp
0x04F7D8D8 (0x04F7D8D1 0x00000001 0x0028E040 0x04FA3C38) <unknown module>
0x0028E409 (0x00000001 0x0028E040 0x04FA3C38 0x0000000A) <unknown module>
0x04F7D8D1 (0x01000000 0x00000000 0xFC000000 0x00FFFFFF) <unknown module>
clang++.exe: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 3.7.0 (tags/RELEASE_370/final)
Target: i686-w64-windows-gnu
Thread model: posix
clang++.exe: note: diagnostic msg: PLEASE submit a bug report to
<a href="http://llvm.org/bugs/">http://llvm.org/bugs/</a> and include the crash backtrace, preprocessed source, and
associated run script.
clang++.exe: note: diagnostic msg:
********************
PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang++.exe: note: diagnostic msg: C:\msys64\tmp\t-089b7b.cpp
clang++.exe: note: diagnostic msg: C:\msys64\tmp\t-089b7b.sh
clang++.exe: note: diagnostic msg:</pre>
</div>
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