Bugs item #2938842, was opened at 2010-01-24 21:21
Message generated for change (Comment added) made by sjoerd
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Category: SQL/Core
Group: MonetDB5 CVS Head
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Sjoerd Mullender (sjoerd)
Assigned to: Sjoerd Mullender (sjoerd)
Summary: second dump causes crash
Initial Comment:
Using a database created with the HEAD version of 2009-12-02, but running with
a server checked out from HEAD on 2010-01-24, the second consecutive dump
(running msqldump) causes a segfault at
at /home/sjoerd/src/MonetDB/devel/MonetDB/src/gdk/gdk_bbp.mx:1830
1830 assert(BBP_cache(i)->batSharecnt >= 0);
The reason for the segfault is
(gdb) p BBP[i]
$1 = {b = {0x0, 0x0}, nme = {0x615288 "tmp_141", 0x6152a8 "tmpr_141"}, bak = {
0x0, 0x0}, next = {0, 0}, cache = 0x6150b8, path = 0x6152d8 "01/141",
refs = 0, lrefs = 4, lastused = 32996, status = 32}
(This is a new report based on a comment in #2935207 which was for a different
bug.)
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>Comment By: Sjoerd Mullender (sjoerd)
Date: 2010-01-24 21:23
Message:
It seems a BAT is decref'ed when it already has a refcount 0.
The crash does not occur when loading the database in the same version as
the version in which it is dumped.
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