Mr. Michael Vogt helped me to resolve this issue. According to his suggestion I had removed /usr/lib/libjackasyn.so.0 from my LD_PRELOAD and apt-get update did complete successfully. Backtrace (with LD_PRELOAD=/usr/lib/libjackasyn.so.0): GNU gdb 6.3-debian Copyright 2004 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "i386-linux". Attaching to process 18171 Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1". warning: could not load vsyscall page because no executable was specified warning: try using the "file" command first Reading symbols from /usr/lib/apt/methods/gpgv...done. Reading symbols from /usr/lib/libjackasyn.so.0...done. Loaded symbols for /usr/lib/libjackasyn.so.0 Reading symbols from /usr/lib/libapt-pkg-libc6.3-6.so.3.10...done. Loaded symbols for /usr/lib/libapt-pkg-libc6.3-6.so.3.10 Reading symbols from /usr/lib/libstdc++.so.6...done. Loaded symbols for /usr/lib/libstdc++.so.6 Reading symbols from /lib/tls/i686/cmov/libm.so.6...done. Loaded symbols for /lib/tls/i686/cmov/libm.so.6 Reading symbols from /lib/libgcc_s.so.1...done. Loaded symbols for /lib/libgcc_s.so.1 Reading symbols from /lib/tls/i686/cmov/libc.so.6...done. Loaded symbols for /lib/tls/i686/cmov/libc.so.6 Reading symbols from /usr/lib/libsamplerate.so.0...done. Loaded symbols for /usr/lib/libsamplerate.so.0 Reading symbols from /usr/lib/libjack-0.100.0.so.0...done. Loaded symbols for /usr/lib/libjack-0.100.0.so.0 Reading symbols from /lib/tls/i686/cmov/libdl.so.2...done. Loaded symbols for /lib/tls/i686/cmov/libdl.so.2 Reading symbols from /lib/tls/i686/cmov/librt.so.1...done. Loaded symbols for /lib/tls/i686/cmov/librt.so.1 Reading symbols from /lib/ld-linux.so.2...done. Loaded symbols for /lib/ld-linux.so.2 Reading symbols from /lib/tls/i686/cmov/libpthread.so.0...done. [Thread debugging using libthread_db enabled] [New Thread -1480964416 (LWP 18171)] Loaded symbols for /lib/tls/i686/cmov/libpthread.so.0 0xffffe410 in ?? () (gdb) continue Continuing. Program received signal SIGINT, Interrupt. [Switching to Thread -1480964416 (LWP 18171)] 0xffffe410 in ?? () (gdb) bt #0 0xffffe410 in ?? () #1 0xafb18e18 in ?? () #2 0x00000000 in ?? () #3 0xafb18e54 in ?? () #4 0xa7cc3d7d in select () from /lib/tls/i686/cmov/libc.so.6 #5 0xa7ef1a00 in select () from /usr/lib/libjackasyn.so.0 #6 0xa7e68398 in WaitFd () from /usr/lib/libapt-pkg-libc6.3-6.so.3.10 #7 0xa7e8629b in pkgAcqMethod::Run () from /usr/lib/libapt-pkg-libc6.3-6.so.3.10 #8 0x0804b851 in main () at gpgv.cc:295 (gdb)
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