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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 static analyzer on template with optional constructor parameter"
href="http://llvm.org/bugs/show_bug.cgi?id=15832">15832</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Crash in static analyzer on template with optional constructor parameter
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Macintosh
</td>
</tr>
<tr>
<th>OS</th>
<td>MacOS X
</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>Static Analyzer
</td>
</tr>
<tr>
<th>Assignee</th>
<td>kremenek@apple.com
</td>
</tr>
<tr>
<th>Reporter</th>
<td>bugzilla@jwwalker.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=10411" name="attach_10411" title="source (not preprocessed) showing bug">attachment 10411</a> <a href="attachment.cgi?id=10411&action=edit" title="source (not preprocessed) showing bug">[details]</a></span>
source (not preprocessed) showing bug
Overview: When I run the static analyzer on a certain C++ file, clang crashes
with a bad instruction error.
Steps to reproduce:
Run the analyzer on the attached file.
Actual results:
Crash (bad instruction error), with a log beginning:
Assertion failed: (Val && "isa<> used on a null pointer"), function doit, file
/open-source/llvm/include/llvm/Support/Casting.h, line 97.0
Expect results:
Maybe some analyzer warnings.
Build Date & Platform:
$ /opt/bin/clang --version
clang version 3.3 (trunk 180122) (llvm/trunk 180121)
Target: x86_64-apple-darwin11.4.2
Thread model: posix
Additional Information:
If I change the line defining the variable str1 to str1(NULL), the crash goes
away.
Mac OS crash log:
Process: clang [49444]
Path: /opt/bin/clang
Identifier: clang
Version: 3.3 (???)
Code Type: X86-64 (Native)
Parent Process: clang [49443]
Date/Time: 2013-04-23 16:39:39.796 -0700
OS Version: Mac OS X 10.7.5 (11G63)
Report Version: 9
Interval Since Last Report: 88475 sec
Crashes Since Last Report: 75
Per-App Crashes Since Last Report: 74
Anonymous UUID: C6540820-F0A3-4E61-82D4-3424027652A3
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_BAD_INSTRUCTION (SIGILL)
Exception Codes: 0x0000000000000001, 0x0000000000000000
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 clang 0x000000010358a850 0x101d73000 + 25262160
1 clang 0x000000010358a821 0x101d73000 + 25262113
2 clang 0x0000000102489ce5 0x101d73000 + 7433445
3 clang 0x000000010248702f 0x101d73000 + 7421999
4 clang 0x0000000102491f8f 0x101d73000 + 7466895
5 clang 0x0000000102492655 0x101d73000 + 7468629
6 clang 0x00000001024cf37d 0x101d73000 + 7717757
7 clang 0x00000001024e1a68 0x101d73000 + 7793256
8 clang 0x00000001024f9596 0x101d73000 + 7890326
9 clang 0x00000001024e86ba 0x101d73000 + 7820986
10 clang 0x00000001024d7336 0x101d73000 + 7750454
11 clang 0x00000001024d6f48 0x101d73000 + 7749448
12 clang 0x00000001024d6b52 0x101d73000 + 7748434
13 clang 0x00000001023e8184 0x101d73000 + 6771076
14 clang 0x00000001023e7925 0x101d73000 + 6768933
15 clang 0x00000001023e588e 0x101d73000 + 6760590
16 clang 0x000000010204e774 0x101d73000 + 2996084
17 clang 0x0000000101dd6957 0x101d73000 + 407895
18 clang 0x0000000101db282d 0x101d73000 + 260141
19 clang 0x0000000101d7d1ca 0x101d73000 + 41418
20 clang 0x0000000101d74370 0x101d73000 + 4976
21 clang 0x0000000101d7a4e9 0x101d73000 + 29929
22 clang 0x0000000101d74034 0x101d73000 + 4148
Thread 0 crashed with X86 Thread State (64-bit):
rax: 0x0000000000000000 rbx: 0x0000000103f3aef0 rcx: 0x00007fff8be70e42
rdx: 0xffffffffffffffff
rdi: 0x000000000000003c rsi: 0x0000000000000000 rbp: 0x00007fff6196ebb0
rsp: 0x00007fff6196ebb0
r8: 0x0000000000000000 r9: 0x00000000000f4240 r10: 0x0000000000000001
r11: 0x00007fff73920228
r12: 0x0000000000000001 r13: 0x00007fdce3c5b7a0 r14: 0x0000000000000000
r15: 0x00007fdce3c506a8
rip: 0x000000010358a850 rfl: 0x0000000000010206 cr2: 0x00007fdce3a60008
Logical CPU: 2</pre>
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