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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - lld/mac crashes when ICFing code with undefs"
href="https://bugs.llvm.org/show_bug.cgi?id=52330">52330</a>
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<th>Summary</th>
<td>lld/mac crashes when ICFing code with undefs
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<th>Product</th>
<td>lld
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>MachO
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>nicolasweber@gmx.de
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<th>CC</th>
<td>gkm@fb.com, jezreel@gmail.com, llvm-bugs@lists.llvm.org, smeenai@fb.com
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<p>
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<pre>I noticed this in .s form while working on PR51999 (not caused by the fix
there). Turns out it's easy to hit from .c files too:
% cat foo.c
void g();
int main() { g(); }
% out/gn/bin/clang foo.c -fuse-ld=lld -Wl,--icf=all --target=arm64-apple-macos
-isysroot $(xcrun -show-sdk-path -sdk macosx) -fno-exceptions
foldIdenticalSections symbol kind
UNREACHABLE executed at ../../lld/MachO/ICF.cpp:250!
We shouldn't crash here but emit an "undefined symbol" error instead.
(I'll take a look.)</pre>
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