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<base href="http://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 --- - Crash in SmallVector.h from driver while reporting another crash"
href="http://llvm.org/bugs/show_bug.cgi?id=19515">19515</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Crash in SmallVector.h from driver while reporting another crash
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</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>Driver
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>douglas_yung@playstation.sony.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>While running clang, I am hitting an assertion failure in the compiler driver
while it is trying to report another crash in the front-end.
Clang information:
- Host: AMD64
- Target: AMD64
- Host OS: Linux (Ubuntu 13.10)
- SVN Revision: 204763 (This failure has also been observed in revision
206712)
The assert that failed is the following:
clang: /home/snc/llvm/llvm/include/llvm/ADT/SmallVector.h:145: const T&
llvm::SmallVectorTemplateCommon<T, <template-parameter-1-2>
<span class="quote">>::operator[](unsigned int) const [with T = const char*;</span >
<template-parameter-1-2> = void; llvm::SmallVectorTemplateCommon<T,
<template-parameter-1-2> >::const_reference = const char* const&]: Assertion
`begin() + idx < end()' failed.
To reproduce this failure, compile the code from PR19514 (reproduced here for
convenience) with the command line “clang –c repro.cpp –lstdc++”.
struct A { };
struct D { int fld4; };
struct B: virtual D, A { };
struct C: B, A { void vf1 (); };
void C::vf1 () { }
Note that this will produce two assertion failures in the compiler, the first
is in the front-end and is filed as PR19514, and the second is in the driver
which is the subject of this bug.
The crash in the driver produces the following output:
…
clang: error: unable to execute command: Aborted (core dumped)
clang: error: clang frontend command failed due to signal (use -v to see
invocation)
clang version 3.5.0 (trunk 204763)
Target: x86_64-unknown-linux-gnu
Thread model: posix
clang: 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: /home/snc/llvm/llvm/include/llvm/ADT/SmallVector.h:145: const T&
llvm::SmallVectorTemplateCommon<T, <template-parameter-1-2>
<span class="quote">>::operator[](unsigned int) const [with T = const char*;</span >
<template-parameter-1-2> = void; llvm::SmallVec
torTemplateCommon<T, <template-parameter-1-2> >::const_reference = const char*
const&]: Assertion `begin() + idx < end()' failed.
0 clang 0x00000000036cd47a llvm::sys::PrintStackTrace(_IO_FILE*) +
38
1 clang 0x00000000036cd6f7
2 clang 0x00000000036cd0ab
3 libpthread.so.0 0x00007fb1e2ac6bb0
4 libc.so.6 0x00007fb1e1d03f77 gsignal + 55
5 libc.so.6 0x00007fb1e1d075e8 abort + 328
6 libc.so.6 0x00007fb1e1cfcd43
7 libc.so.6 0x00007fb1e1cfcdf2
8 clang 0x0000000000e857b1
9 clang 0x0000000000e82574
10 clang 0x0000000000fcd24b
clang::driver::Driver::generateCompilationDiagnostics(clang::driver::Compilation&,
clang::driver::Command const*) + 825
11 clang 0x0000000000e8c70b main + 3672
12 libc.so.6 0x00007fb1e1ceede5 __libc_start_main + 245
13 clang 0x0000000000e7e189
Stack dump:
0. Program arguments: /home/snc/llvm/build/Debug+Asserts/bin/clang -c
repro.cpp -lstdc++
As an aside, removing the “-lstdc++” seems to prevent this second assert from
happening.</pre>
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