Strange assertion failure in 2.6 snapshot...

From: Joe Cooper <joe@dont-contact.us>
Date: Tue, 05 Mar 2002 08:30:14 -0600

Hey folks,

It appears that 2.6 after the commloops merge will not perform a PURGE
without an assertion failure. I get the following:

2002/03/05 08:36:30| assertion failed: store_client.c:211:
"sc->cmp_offset == copy_offset"

And a backtrace of:

Program received signal SIGABRT, Aborted.
[Switching to Thread 1024 (LWP 27216)]
0x400db5c1 in __kill () from /lib/libc.so.6
(gdb) bt
#0 0x400db5c1 in __kill () from /lib/libc.so.6
#1 0x4005538e in raise (sig=6) at signals.c:65
#2 0x400dc9a8 in abort () at ../sysdeps/generic/abort.c:88
#3 0x08065e15 in xassert ()
#4 0x0809bf30 in storeClientCopy ()
#5 0x0805fb83 in clientWriteComplete ()
#6 0x0806274d in CommWriteStateCallbackAndFree ()
#7 0x08065249 in comm_select ()
#8 0x08085b35 in main ()
#9 0x400c9e5e in __libc_start_main (main=0x8085860 <main>, argc=2,
     ubp_av=0xbffffb54, init=0x8049fb0 <_init>, fini=0x80bc720 <_fini>,
     rtld_fini=0x4000d3c4 <_dl_fini>, stack_end=0xbffffb4c)
     at ../sysdeps/generic/libc-start.c:129

(gdb) frame 4
#4 0x0809bf30 in storeClientCopy ()
(gdb) print sc->cmp_offset
Attempt to extract a component of a value that is not a structure pointer.
(gdb) print sc
$1 = 0x400830d0
(gdb) print *sc
$2 = 0.0084132443630149294931509329313612522

This is a snapshot from immediately after the merge, so maybe Adrian has
fixed it since then? I'll fetch it and check it out next. I was just
guessing about what sort of information would be needed for debugging--I
can do another backtrace and print any other values needed to figure out
what's happening.

Anyway. This seemed weird enough to get some input from Adrian...

Will give this a go on 2.5 and 2.4, also, but I seem to recall I was
already running 2.5 for some earlier work in this area with no problems.
  (And I suspect someone would have mentioned it by now, also.)

-- 
Joe Cooper <joe@swelltech.com>
http://www.swelltech.com
Web Caching Appliances and Support
Received on Tue Mar 05 2002 - 07:31:16 MST

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