<br><font size=2 face="sans-serif">Looks like a bug in presolve which has
been fixed in trunk. I will have a look at the differences between
stable and trunk.</font>
<br>
<br><font size=2 face="sans-serif">John Forrest</font>
<br>
<br>
<br>
<table width=100%>
<tr>
<td><img src=cid:_1_0D6CA0440D6C9C5C005F6BD58525750C>
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<td width=100%><font size=2 face="sans-serif"><b>[Clp] Assertion/Segfault
during postsolve</b></font></table>
<br>
<table width=100%>
<tr>
<td><font size=2 color=#e26200 face="sans-serif"><b>Christoph Cullmann
</b></font>
<td><font size=2 color=#8f8f8f face="sans-serif">to:</font>
<td><font size=2 face="sans-serif">clp</font>
<td>
<div align=right><font size=1 face="sans-serif">11/25/2008 06:41 AM</font></div></table>
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<td><font size=2 color=#8f8f8f face="sans-serif">Sent by:</font>
<td width=100%><font size=2 color=#e26200 face="sans-serif"><b>clp-bounces@list.coin-or.org</b></font></table>
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<hr>
<br>
<br>
<br><tt><font size=2>Hi,<br>
<br>
with the attached generated lp-file, I get the following assertion in the
<br>
debug build or segfault in release, any ideas?<br>
I am using a up-to-date 2.2 version from SVN.<br>
<br>
clpsolve: CoinPackedMatrix.cpp:638: void CoinPackedMatrix::removeGaps(double):
<br>
Assertion `start_[i] == start_[i-1] + length_[i-1]' failed.
<br>
<br>
Program received signal SIGABRT, Aborted.<br>
0x00007f537e9ab095 in raise () from /lib/libc.so.6<br>
(gdb) bt
<br>
#0 0x00007f537e9ab095 in raise () from /lib/libc.so.6<br>
#1 0x00007f537e9acaf0 in abort () from /lib/libc.so.6<br>
#2 0x00007f537e9a42df in __assert_fail () from /lib/libc.so.6<br>
#3 0x00000000008973db in CoinPackedMatrix::removeGaps (this=<value
optimized <br>
out>, removeValue=-1) at CoinPackedMatrix.cpp:638<br>
#4 0x000000000075ebda in CoinPostsolveMatrix (this=0x7fff87176930,
si=<value <br>
optimized out>, ncols0_in=<value optimized out>, nrows0_in=60,
<br>
nelems0=192, maxmin=1, sol_in=<value optimized out>,
acts_in=0xb68640,<br>
colstat_in=0xb68b40 <br>
"\003\003\003\003\001\003\003\003\003\003\003\002\003\003\003\003\002\003\001\003\001",
<br>
'\003' <repeats 64 times>, '\001'<repeats 57 times>, "�",
rowstat_in=0xb68b92 <br>
"\003\003\003", <br>
'\001' <repeats 57 times>, "�") at ClpPresolve.cpp:1321<br>
#5 0x000000000075f168 in ClpPresolve::postsolve (this=0x7fff87177730,
<br>
updateStatus=true) at ClpPresolve.cpp:227<br>
#6 0x00000000007c2e22 in ClpSimplex::initialSolve (this=0x7fff871778a0,
<br>
options=@0x7fff87177f50) at ClpSolve.cpp:2320<br>
#7 0x000000000070aa25 in OsiClpSolverInterface::initialSolve <br>
(this=0x7fff87178b00) at OsiClpSolverInterface.cpp:358<br>
<br>
Greetings<br>
Christoph<br>
<br>
-- <br>
-------------------------------------- Christoph Cullmann ---------<br>
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<br>
[attachment "17191-t17_2-main.lp" deleted by John J Forrest/Watson/IBM]
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</font></tt>
<br>