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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Macro generated try-catch results in abortion of subsequent throw's..."
href="https://bugs.llvm.org/show_bug.cgi?id=42080">42080</a>
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<th>Summary</th>
<td>Macro generated try-catch results in abortion of subsequent throw's...
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>7.0
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>Linux
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>release blocker
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>C++
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>Paul.Hancock.17041993@live.com
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<th>CC</th>
<td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.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=22056" name="attach_22056" title="crude testing example source">attachment 22056</a> <a href="attachment.cgi?id=22056&action=edit" title="crude testing example source">[details]</a></span>
crude testing example source
It seems that the code in a macro, such as this;
<span class="quote">>> #define EXCEPTION_ESCAPE_TRY(F, N) \
>> try { \
>> F; \
>> } catch (...) \
>> { \
>> printf("macro catch success"); \
>> printf(N); \
>> return -1; \
>> }</span >
...will be stripped out of existence, for reasons unknown. Even under pedantic
mode, passing a cc* to N will fail to trigger a warning or error, as it
apparently "doesn't even exist".
'F;' will occur still however, but any throw's within will compile as
abort(0)'s, even if the macro itself resides inside a parent try-catch. If the
F; is replaced with a simple throw; the entire macro seems to vanish
entirely...
A crude example source is attached, that tests each general try-catch case
before the macro-generated one. All behaves as expected when jumping through
the debugger, until you get to the macro where it simply abort's...</pre>
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