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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - CompilerInstance::createPreprocessor() leaks the Preprocessor sometimes"
href="https://llvm.org/bugs/show_bug.cgi?id=23290">23290</a>
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<th>Summary</th>
<td>CompilerInstance::createPreprocessor() leaks the Preprocessor sometimes
</td>
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<th>Product</th>
<td>clang
</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>Windows NT
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>-New Bugs
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>yaron.keren@gmail.com
</td>
</tr>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
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<p>
<div>
<pre>CompilerInstance::createPreprocessor should not be called more than once as
this will lead to a memory leak of the Preprocessor PP and probably to multiple
initializations of various other stuff such as what done in
InitializePreprocessor() = all sorts of trouble.
Yet, if an assert is added:
void CompilerInstance::createPreprocessor(TranslationUnitKind TUKind) {
assert(!PP);
three regression tests start failing, meaning they do call
CompilerInstance::createPreprocessor more than once and it's possible scenario.
Clang :: FixIt/fixit-recompile.c
Clang :: Misc/serialized-diags-single-issue.c
Clang :: PCH/local_static.cpp
The first two tests use fixit but the third do not.</pre>
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