Details
Critical Description
I have a forward proxy that just updated to the latest git master release on 2012-11-16, it crashed several times with the same assert:
Program terminated with signal 11, Segmentation fault. #0 RangeTransform::transform_to_range (this=0x2b12603c2c50) at Transform.cc:842 842 if (*done_byte < (*start - 1)) { Missing separate debuginfos, use: debuginfo-install expat-2.0.1-11.el6_2.x86_64 glibc-2.12-1.47.el6_2.9.x86_64 keyutils-libs-1.4-3.el6.x86_64 krb5-libs-1.9-22.el6_2.1.x86_64 libcom_err-1.41.12-11.el6.x86_64 libgcc-4.4.6-3.el6.x86_64 libselinux-2.0.94-5.2.el6.x86_64 libstdc++-4.4.6-3.el6.x86_64 openssl-1.0.0-20.el6_2.4.x86_64 pcre-7.8-3.1.el6.x86_64 tcl-8.5.7-6.el6.x86_64 xz-libs-4.999.9-0.3.beta.20091007git.el6.x86_64 zlib-1.2.3-27.el6.x86_64 (gdb) (gdb) bt #0 RangeTransform::transform_to_range (this=0x2b12603c2c50) at Transform.cc:842 #1 0x00000000004da440 in RangeTransform::handle_event (this=0x2b12603c2c50, event=<value optimized out>, edata=<value optimized out>) at Transform.cc:815 #2 0x0000000000654dd4 in handleEvent (this=0x2b1200404010, e=0x2b12841c0ea0, calling_code=1) at I_Continuation.h:146 #3 EThread::process_event (this=0x2b1200404010, e=0x2b12841c0ea0, calling_code=1) at UnixEThread.cc:142 #4 0x000000000065593b in EThread::execute (this=0x2b1200404010) at UnixEThread.cc:193 #5 0x00000000006540d2 in spawn_thread_internal (a=0x2c987d0) at Thread.cc:88 #6 0x0000003e878077f1 in start_thread () from /lib64/libpthread.so.0 #7 0x0000003e86ce5ccd in clone () from /lib64/libc.so.6 (gdb) f 1 #1 0x00000000004da440 in RangeTransform::handle_event (this=0x2b12603c2c50, event=<value optimized out>, edata=<value optimized out>) at Transform.cc:815 815 transform_to_range(); (gdb) l 810 m_output_vio->nbytes = m_done; 811 m_output_vio->reenable(); 812 return 0; 813 } 814 815 transform_to_range(); 816 break; 817 } 818 } 819 (gdb) p m_output_vio $1 = (VIO *) 0x2b12603c2e78 (gdb) p *m_output_vio $2 = {_cont = 0x2b12603c2c50, nbytes = 70664, ndone = 0, op = 2, buffer = {mbuf = 0x2b126c0b36e0, entry = 0x2b126c0b36f8}, vc_server = 0x2b12603c2df8, mutex = {m_ptr = 0x2b12686700e0}} (gdb) f 2 #2 0x0000000000654dd4 in handleEvent (this=0x2b1200404010, e=0x2b12841c0ea0, calling_code=1) at I_Continuation.h:146 146 return (this->*handler) (event, data); (gdb) l 141 @param data General purpose data related to the event code (Processor specific). 142 @return State machine and processor specific return code. 143 144 */ 145 int handleEvent(int event = CONTINUATION_EVENT_NONE, void *data = 0) { 146 return (this->*handler) (event, data); 147 } 148 149 /** 150 Contructor of the Continuation object. It should not be used (gdb) bt #0 RangeTransform::transform_to_range (this=0x2b12603c2c50) at Transform.cc:842 #1 0x00000000004da440 in RangeTransform::handle_event (this=0x2b12603c2c50, event=<value optimized out>, edata=<value optimized out>) at Transform.cc:815 #2 0x0000000000654dd4 in handleEvent (this=0x2b1200404010, e=0x2b12841c0ea0, calling_code=1) at I_Continuation.h:146 #3 EThread::process_event (this=0x2b1200404010, e=0x2b12841c0ea0, calling_code=1) at UnixEThread.cc:142 #4 0x000000000065593b in EThread::execute (this=0x2b1200404010) at UnixEThread.cc:193 #5 0x00000000006540d2 in spawn_thread_internal (a=0x2c987d0) at Thread.cc:88 #6 0x0000003e878077f1 in start_thread () from /lib64/libpthread.so.0 #7 0x0000003e86ce5ccd in clone () from /lib64/libc.so.6 (gdb) f 0 #0 RangeTransform::transform_to_range (this=0x2b12603c2c50) at Transform.cc:842 842 if (*done_byte < (*start - 1)) { (gdb) l 837 done_byte = &m_ranges[m_current_range]._done_byte; 838 start = &m_ranges[m_current_range]._start; 839 avail = reader->read_avail(); 840 841 while (true) { 842 if (*done_byte < (*start - 1)) { 843 toskip = *start - *done_byte - 1; 844 845 if (toskip > avail) 846 toskip = avail; (gdb) p m_ranges $4 = (RangeRecord *) 0x0 (gdb) p start $5 = (const int64_t *) 0x0 (gdb) p avail $6 = 70664 (gdb) p done_byte $7 = (int64_t *) 0x10
