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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [Win] Assertion failed: D->getCachedLinkage() == LV.getLinkage()"
href="https://bugs.llvm.org/show_bug.cgi?id=42364">42364</a>
</td>
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<th>Summary</th>
<td>[Win] Assertion failed: D->getCachedLinkage() == LV.getLinkage()
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Windows NT
</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>Modules
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>mikhail.strelnikov@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=22132" name="attach_22132" title="reproduces the bug">attachment 22132</a> <a href="attachment.cgi?id=22132&action=edit" title="reproduces the bug">[details]</a></span>
reproduces the bug
TL;DR Please see attached 'build.bat'
file: my.cppm
export module my;
template <class>
struct v {
~v(){} // works, if destructor is removed
};
export v<int> foo(){ throw 1; }
file: main.cpp
import my;
int main(){ foo(); }
file: commands.bat
set CC="C:\Program Files\LLVM\bin\clang++.exe"
%CC% -std=c++2a -fmodules-ts --precompile my.cppm -fprebuilt-module-path=.
-o my.pcm
%CC% -std=c++2a -fmodules-ts -c my.pcm -o my.o
%CC% -std=c++2a -fmodules-ts -fuse-ld=lld -fprebuilt-module-path=. my.o
main.cpp -o main.exe
On Linux it does not fail on assert. It emits quite confusing warning, then
refuses to link:
my.cppm:4:5: warning: inline function 'v<int>::~v' is not defined
[-Wundefined-inline]
~v(){}
^
main.cpp:2:13: note: used here
int main(){ foo(); }
^
1 warning generated.
ld.lld: error: undefined symbol: _ZW2myEN1vIiED1Ev</pre>
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