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Crash after loading of annotations

From: Urs Holzer <urs@andonyar.com>
Date: Sat, 9 Jun 2007 18:15:17 +0200
To: www-amaya@w3.org
Message-Id: <200706091815.17847.urs@andonyar.com>

Hello

Amaya crashes right after it requests annotations from the server.
More precise:
When I hit 'load' in the annotations menu, Amaya sends a request to the 
server. If needed, it also asks for authentication and sends the request to 
the server with the credentials. Then it crashes. I don't know, wether it 
parses the answer of the server before the crash. The errormessage on the 
console is 
*** Amaya: Irrecoverable error ***Segmentation fault

If the server isn't reachable, i.e. If I load annotations without being 
connected to the internet, something similar happens. (Note: Trying to 
connect to an unreachable server by entering an URI into the URI-field, 
everything works as expected.) The error message then is 
*** glibc detected *** free(): invalid pointer: 0x0a243d44 ***
*** Amaya: Irrecoverable error ***Aborted

This happens on the revision HEAD from the CVS repository. On an older release 
of amaya, Amaya9.53, loading annotations worked, but Amaya then crashed on 
the _next_ request to a server it made.

I am running Debian Linux 4.0 (i.e. the stable distribution etch) on an x86 
machine.

As I am not familiar with debuggin C applications, please tell me how I can 
help locating the problem. I ran Amaya under strace, here is the last part of 
the trace, perhaps it helps you:
....
read(18, "382\r\n5\">\n    <ns97:creator xmlns"..., 32768) = 910
write(16, "5\">\n    <ns97:creator xmlns:ns97"..., 898) = 898
write(17, "5\">\n    <ns97:creator xmlns:ns97"..., 898) = 898
close(17)                               = 0
munmap(0xb6f90000, 4096)                = 0
open("/home/urs/.amaya/libwww-cache/44/filen5hQ34.meta", O_WRONLY|O_CREAT|
O_TRUNC, 0666) = 17
fstat64(17, {st_mode=S_IFREG|0644, st_size=0, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 
0xb6f90000
write(17, "Content-Type: application/xml\nSe"..., 99) = 99
close(17)                               = 0
munmap(0xb6f90000, 4096)                = 0
gettimeofday({1181405277, 39560}, NULL) = 0
gettimeofday({1181405277, 39614}, NULL) = 0
close(16)                               = 0
munmap(0xb6f91000, 4096)                = 0
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
rt_sigaction(SIGBUS, {SIG_DFL}, {0x8211814, [BUS], SA_RESTART}, 8) = 0
rt_sigaction(SIGPIPE, {SIG_IGN}, {SIG_DFL}, 8) = 0
rt_sigaction(SIGSEGV, {SIG_DFL}, {0x8211814, [SEGV], SA_RESTART}, 8) = 0
rt_sigaction(SIGABRT, {SIG_DFL}, {0x8211814, [ABRT], SA_RESTART}, 8) = 0
write(2, "*** Amaya: Irrecoverable error *"..., 34*** Amaya: Irrecoverable 
error ***) = 34
stat64("/home/urs/.amaya-check-instance", {st_mode=S_IFSOCK|0700, 
st_size=0, ...}) = 0
unlink("/home/urs/.amaya-check-instance") = 0
sigreturn()                             = ? (mask now [])
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
+++ killed by SIGSEGV +++
Process 4264 detached

Greetings
Urs
Received on Saturday, 9 June 2007 21:01:06 UTC

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