Dan,

This one occurs even less frequently than the last one, but 
unfortunately it still segfaults occasionally when garbage collection 
kicks in.  It appears to crop up in random places (inside active-record, 
inside erb, etc.) instead of just when the XML document access is 
occurring like the previous ones, so I'm not sure any of the backtraces 
are worth anything for this one.  The backtrace below which I included 
just in case is the only one that has even had a reference in it to 
anything libxml related, they all have garbage collection in common though.

Calvin

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1208449344 (LWP 29695)]
0x006cda7b in malloc_consolidate () from /lib/libc.so.6
(gdb) bt
#0  0x006cda7b in malloc_consolidate () from /lib/libc.so.6
#1  0x006ce165 in _int_free () from /lib/libc.so.6
#2  0x006ce72b in free () from /lib/libc.so.6
#3  0x0027e103 in xmlHashFree () from /usr/lib/libxml2.so.2
#4  0x002a2c8e in xmlXPathRegisteredFuncsCleanup () from 
/usr/lib/libxml2.so.2
#5  0x002a3e40 in xmlXPathFreeContext () from /usr/lib/libxml2.so.2
#6  0x00ea5a8c in ruby_xml_xpath_context_free (rxxpc=0x8efb560) at 
ruby_xml_xpath_context.c:28
#7  0x00dad48f in garbage_collect () at gc.c:1209
#8  0x00dad658 in ruby_xmalloc (size=97804) at gc.c:103
#9  0x00df3bba in str_new (klass=Variable "klass" is not available.
) at string.c:92
#10 0x00df8508 in rb_str_plus (str1=3065727700, str2=3065727380) at 
string.c:391
#11 0x00d900b8 in call_cfunc (func=0xdf84d4 <rb_str_plus>, 
recv=3065727700, len=Variable "len" is not available.
) at eval.c:5665
#12 0x00d9a4dd in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5815
#13 0x00d9b106 in rb_call (klass=3086505960, recv=3065727700, mid=43, 
argc=1, argv=0xbf9518b0, scope=0, self=3065785320) at eval.c:6062
#14 0x00d97129 in rb_eval (self=3065785320, n=Variable "n" is not available.
) at eval.c:3447
#15 0x00d970ba in rb_eval (self=3065785320, n=Variable "n" is not available.
) at eval.c:3442
#16 0x00d98177 in rb_eval (self=3065785320, n=Variable "n" is not available.
) at eval.c:3424
#17 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#18 0x00d9b106 in rb_call (klass=3083080640, recv=3065785320, mid=53641, 
argc=0, argv=0x0, scope=2, self=3065785320) at eval.c:6062
#19 0x00d9869e in rb_eval (self=Variable "self" is not available.
) at eval.c:3468
#20 0x00d97cb7 in rb_eval (self=3065785320, n=Variable "n" is not available.
) at eval.c:3628
#21 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#22 0x00d9b106 in rb_call (klass=3083160680, recv=3065785320, mid=56497, 
argc=0, argv=0x0, scope=2, self=3065785320) at eval.c:6062
#23 0x00d9869e in rb_eval (self=Variable "self" is not available.
) at eval.c:3468
#24 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#25 0x00d9b106 in rb_call (klass=3083157600, recv=3065785320, mid=12585, 
argc=0, argv=0x0, scope=2, self=3065785320) at eval.c:6062
#26 0x00d9869e in rb_eval (self=Variable "self" is not available.
) at eval.c:3468
#27 0x00d97cb7 in rb_eval (self=3065785320, n=Variable "n" is not available.
) at eval.c:3628
#28 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#29 0x00d9b106 in rb_call (klass=3083080640, recv=3065785320, mid=53609, 
argc=0, argv=0x0, scope=2, self=3065785320) at eval.c:6062
#30 0x00d9869e in rb_eval (self=Variable "self" is not available.
) at eval.c:3468
#31 0x00d97cb7 in rb_eval (self=3065785320, n=Variable "n" is not available.
) at eval.c:3628
#32 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#33 0x00d9b106 in rb_call (klass=3083160680, recv=3065785320, mid=51809, 
argc=0, argv=0x0, scope=2, self=3065785320) at eval.c:6062
#34 0x00d9869e in rb_eval (self=Variable "self" is not available.
) at eval.c:3468
#35 0x00d96db2 in rb_eval (self=3065785320, n=Variable "n" is not available.
) at eval.c:3614
#36 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#37 0x00d9b106 in rb_call (klass=3083080640, recv=3065785320, mid=53455, 
argc=0, argv=0x0, scope=1, self=3065785320) at eval.c:6062
#38 0x00d9723f in rb_eval (self=Variable "self" is not available.
) at eval.c:3462
#39 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#40 0x00d9b106 in rb_call (klass=3083163700, recv=3065785320, mid=56071, 
argc=0, argv=0x0, scope=1, self=3065785320) at eval.c:6062
#41 0x00d9723f in rb_eval (self=Variable "self" is not available.
) at eval.c:3462
#42 0x00d9d501 in rb_yield_0 (val=Variable "val" is not available.
) at eval.c:4991
#43 0x00d9880b in rb_eval (self=3065931960, n=Variable "n" is not available.
) at eval.c:3252
#44 0x00d99674 in rb_eval (self=3065931960, n=Variable "n" is not available.
) at eval.c:3263
#45 0x00d99a62 in rb_eval (self=3065931960, n=Variable "n" is not available.
) at eval.c:3311
#46 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#47 0x00d9b106 in rb_call (klass=3084869620, recv=3065931960, mid=55513, 
argc=1, argv=0xbf956480, scope=0, self=3065414060) at eval.c:6062
#48 0x00d97129 in rb_eval (self=3065414060, n=Variable "n" is not available.
) at eval.c:3447
#49 0x00da251d in block_pass (self=3065414060, node=0xb7d6e5cc) at 
eval.c:8871
#50 0x00d97c5a in rb_eval (self=3065414060, n=Variable "n" is not available.
) at eval.c:3163
#51 0x00d97cb7 in rb_eval (self=3065414060, n=Variable "n" is not available.
) at eval.c:3628
#52 0x00d99674 in rb_eval (self=3065414060, n=Variable "n" is not available.
) at eval.c:3263
#53 0x00d99a62 in rb_eval (self=3065414060, n=Variable "n" is not available.
) at eval.c:3311
#54 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#55 0x00d9b106 in rb_call (klass=3083136420, recv=3065414060, mid=55513, 
argc=0, argv=0xbf9578f0, scope=0, self=3065785320) at eval.c:6062
#56 0x00d97129 in rb_eval (self=3065785320, n=Variable "n" is not available.
) at eval.c:3447
#57 0x00da251d in block_pass (self=3065785320, node=0xb7d6b750) at 
eval.c:8871
#58 0x00d97c5a in rb_eval (self=3065785320, n=Variable "n" is not available.
) at eval.c:3163
#59 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#60 0x00d9b106 in rb_call (klass=3083137420, recv=3065785320, mid=55513, 
argc=0, argv=0x0, scope=1, self=3065785320) at eval.c:6062
#61 0x00d9723f in rb_eval (self=Variable "self" is not available.
) at eval.c:3462
#62 0x00d99e99 in rb_eval (self=3065785320, n=Variable "n" is not available.
) at eval.c:3177
#63 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#64 0x00d9b106 in rb_call (klass=3083137420, recv=3065785320, mid=51823, 
argc=0, argv=0x0, scope=0, self=3065797980) at eval.c:6062
#65 0x00d97129 in rb_eval (self=3065797980, n=Variable "n" is not available.
) at eval.c:3447
#66 0x00d9d501 in rb_yield_0 (val=Variable "val" is not available.
) at eval.c:4991
#67 0x00d9880b in rb_eval (self=3065931960, n=Variable "n" is not available.
) at eval.c:3252
#68 0x00d99674 in rb_eval (self=3065931960, n=Variable "n" is not available.
) at eval.c:3263
#69 0x00d99a62 in rb_eval (self=3065931960, n=Variable "n" is not available.
) at eval.c:3311
#70 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
---Type <return> to continue, or q <return> to quit---
#71 0x00d9b106 in rb_call (klass=3084869620, recv=3065931960, mid=55513, 
argc=1, argv=0xbf959e10, scope=0, self=3065414060) at eval.c:6062
#72 0x00d97129 in rb_eval (self=3065414060, n=Variable "n" is not available.
) at eval.c:3447
#73 0x00da251d in block_pass (self=3065414060, node=0xb7d6e5cc) at 
eval.c:8871
#74 0x00d97c5a in rb_eval (self=3065414060, n=Variable "n" is not available.
) at eval.c:3163
#75 0x00d97cb7 in rb_eval (self=3065414060, n=Variable "n" is not available.
) at eval.c:3628
#76 0x00d99674 in rb_eval (self=3065414060, n=Variable "n" is not available.
) at eval.c:3263
#77 0x00d99a62 in rb_eval (self=3065414060, n=Variable "n" is not available.
) at eval.c:3311
#78 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#79 0x00d9b106 in rb_call (klass=3083136420, recv=3065414060, mid=55513, 
argc=0, argv=0x0, scope=0, self=3065797980) at eval.c:6062
#80 0x00d97129 in rb_eval (self=3065797980, n=Variable "n" is not available.
) at eval.c:3447
#81 0x00d99e99 in rb_eval (self=3065797980, n=Variable "n" is not available.
) at eval.c:3177
#82 0x00d99674 in rb_eval (self=3065797980, n=Variable "n" is not available.
) at eval.c:3263
#83 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#84 0x00d9b106 in rb_call (klass=3065549560, recv=3065797980, mid=12585, 
argc=0, argv=0xbf95c164, scope=1, self=6) at eval.c:6062
#85 0x00d9b789 in rb_f_send (argc=0, argv=0xbf95c164, recv=3065797980) 
at eval.c:6110
#86 0x00d900d6 in call_cfunc (func=0xd9b6e4 <rb_f_send>, 
recv=3065797980, len=Variable "len" is not available.
) at eval.c:5659
#87 0x00d9a4dd in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5815
#88 0x00d9b106 in rb_call (klass=3086515360, recv=3065797980, mid=4049, 
argc=1, argv=0xbf95c160, scope=1, self=3065797980) at eval.c:6062
#89 0x00d9723f in rb_eval (self=Variable "self" is not available.
) at eval.c:3462
#90 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#91 0x00d9b106 in rb_call (klass=3069736560, recv=3065797980, mid=69129, 
argc=0, argv=0x0, scope=2, self=3065797980) at eval.c:6062
#92 0x00d9869e in rb_eval (self=Variable "self" is not available.
) at eval.c:3468
#93 0x00d983ed in rb_eval (self=3065797980, n=Variable "n" is not available.
) at eval.c:3391
#94 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#95 0x00d9b106 in rb_call (klass=3069662980, recv=3065797980, mid=69097, 
argc=2, argv=0xbf95d000, scope=1, self=3065797980) at eval.c:6062
#96 0x00d9723f in rb_eval (self=Variable "self" is not available.
) at eval.c:3462
#97 0x00d97cb7 in rb_eval (self=3065797980, n=Variable "n" is not available.
) at eval.c:3628
#98 0x00d9d501 in rb_yield_0 (val=Variable "val" is not available.
) at eval.c:4991
#99 0x00d9880b in rb_eval (self=3065492240, n=Variable "n" is not available.
) at eval.c:3252
#100 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#101 0x00d9b106 in rb_call (klass=3069491600, recv=3065492240, mid=5265, 
argc=1, argv=0xbf95de30, scope=0, self=3065797980) at eval.c:6062
#102 0x00d97129 in rb_eval (self=3065797980, n=Variable "n" is not 
available.
) at eval.c:3447
#103 0x00d99e99 in rb_eval (self=3065797980, n=Variable "n" is not 
available.
) at eval.c:3177
#104 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#105 0x00d9b106 in rb_call (klass=3069662980, recv=3065797980, 
mid=69097, argc=2, argv=0xbf95e730, scope=1, self=3065797980) at eval.c:6062
#106 0x00d9723f in rb_eval (self=Variable "self" is not available.
) at eval.c:3462
#107 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#108 0x00d9b106 in rb_call (klass=3069662980, recv=3065797980, 
mid=68481, argc=0, argv=0x0, scope=2, self=3065797980) at eval.c:6062
#109 0x00d9869e in rb_eval (self=Variable "self" is not available.
) at eval.c:3468
#110 0x00d9d501 in rb_yield_0 (val=Variable "val" is not available.
) at eval.c:4991
#111 0x00d9880b in rb_eval (self=3082862180, n=Variable "n" is not 
available.
) at eval.c:3252
#112 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#113 0x00d9b106 in rb_call (klass=3082862080, recv=3082862180, 
mid=57129, argc=0, argv=0x0, scope=0, self=3065797980) at eval.c:6062
#114 0x00d97129 in rb_eval (self=3065797980, n=Variable "n" is not 
available.
) at eval.c:3447
#115 0x00d99e99 in rb_eval (self=3065797980, n=Variable "n" is not 
available.
) at eval.c:3177
#116 0x00d9704d in rb_eval (self=3065797980, n=Variable "n" is not 
available.
) at eval.c:3441
#117 0x00d985d1 in rb_eval (self=3065797980, n=Variable "n" is not 
available.
) at eval.c:3796
#118 0x00d9704d in rb_eval (self=3065797980, n=Variable "n" is not 
available.
) at eval.c:3441
#119 0x00d97cb7 in rb_eval (self=3065797980, n=Variable "n" is not 
available.
) at eval.c:3628
#120 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#121 0x00d9b106 in rb_call (klass=3069662960, recv=3065797980, 
mid=68377, argc=0, argv=0x0, scope=2, self=3065797980) at eval.c:6062
#122 0x00d9869e in rb_eval (self=Variable "self" is not available.
) at eval.c:3468
#123 0x00d99674 in rb_eval (self=3065797980, n=Variable "n" is not 
available.
) at eval.c:3263
#124 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#125 0x00d9b106 in rb_call (klass=3069662920, recv=3065797980, 
mid=63513, argc=0, argv=0xbf9618f4, scope=1, self=6) at eval.c:6062
#126 0x00d9b789 in rb_f_send (argc=0, argv=0xbf9618f4, recv=3065797980) 
at eval.c:6110
#127 0x00d900d6 in call_cfunc (func=0xd9b6e4 <rb_f_send>, 
recv=3065797980, len=Variable "len" is not available.
) at eval.c:5659
#128 0x00d9a4dd in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5815
#129 0x00d9b106 in rb_call (klass=3086515360, recv=3065797980, mid=4049, 
argc=1, argv=0xbf9618f0, scope=1, self=3065797980) at eval.c:6062
#130 0x00d9723f in rb_eval (self=Variable "self" is not available.
) at eval.c:3462
#131 0x00d99a62 in rb_eval (self=3065797980, n=Variable "n" is not 
available.
) at eval.c:3311
#132 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#133 0x00d9b106 in rb_call (klass=3069736560, recv=3065797980, 
mid=69121, argc=3, argv=0xbf962230, scope=1, self=3065797980) at eval.c:6062
#134 0x00d9723f in rb_eval (self=Variable "self" is not available.
) at eval.c:3462
#135 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#136 0x00d9b106 in rb_call (klass=3069662980, recv=3065797980, 
mid=71297, argc=3, argv=0xbf962820, scope=1, self=3065797980) at eval.c:6062
#137 0x00d9723f in rb_eval (self=Variable "self" is not available.
) at eval.c:3462
#138 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#139 0x00d9b106 in rb_call (klass=3069654620, recv=3065797980, 
mid=30209, argc=2, argv=0xbf962e30, scope=0, self=3065549560) at eval.c:6062
#140 0x00d97129 in rb_eval (self=3065549560, n=Variable "n" is not 
available.
) at eval.c:3447
#141 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
---Type <return> to continue, or q <return> to quit---
#142 0x00d9b106 in rb_call (klass=3069736440, recv=3065549560, 
mid=30209, argc=2, argv=0xbf963420, scope=0, self=3066734700) at eval.c:6062
#143 0x00d97129 in rb_eval (self=3066734700, n=Variable "n" is not 
available.
) at eval.c:3447
#144 0x00d9704d in rb_eval (self=3066734700, n=Variable "n" is not 
available.
) at eval.c:3441
#145 0x00d99674 in rb_eval (self=3066734700, n=Variable "n" is not 
available.
) at eval.c:3263
#146 0x00d99a62 in rb_eval (self=3066734700, n=Variable "n" is not 
available.
) at eval.c:3311
#147 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#148 0x00d9b106 in rb_call (klass=3066734680, recv=3066734700, 
mid=49913, argc=3, argv=0xbf964350, scope=0, self=3066708100) at eval.c:6062
#149 0x00d97129 in rb_eval (self=3066708100, n=Variable "n" is not 
available.
) at eval.c:3447
#150 0x00d9d501 in rb_yield_0 (val=Variable "val" is not available.
) at eval.c:4991
#151 0x00d9e7a2 in rb_yield (val=6) at eval.c:5073
#152 0x00d95071 in rb_ensure (b_proc=0xd9e78c <rb_yield>, data1=6, 
e_proc=0x5164c8 <rb_mutex_unlock>, data2=3066707980) at eval.c:5456
#153 0x005165f2 in rb_mutex_synchronize (self=3066707980) at 
fastthread.c:526
#154 0x00d900c7 in call_cfunc (func=0x5165c0 <rb_mutex_synchronize>, 
recv=3066707980, len=Variable "len" is not available.
) at eval.c:5662
#155 0x00d9a4dd in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5815
#156 0x00d9b106 in rb_call (klass=3083146280, recv=3066707980, 
mid=11689, argc=0, argv=0x0, scope=0, self=3066708100) at eval.c:6062
#157 0x00d97129 in rb_eval (self=3066708100, n=Variable "n" is not 
available.
) at eval.c:3447
#158 0x00d99e99 in rb_eval (self=3066708100, n=Variable "n" is not 
available.
) at eval.c:3177
#159 0x00d99674 in rb_eval (self=3066708100, n=Variable "n" is not 
available.
) at eval.c:3263
#160 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#161 0x00d9b106 in rb_call (klass=3084352760, recv=3066708100, 
mid=30209, argc=2, argv=0xbf9659b0, scope=0, self=3083667360) at eval.c:6062
#162 0x00d97129 in rb_eval (self=3083667360, n=Variable "n" is not 
available.
) at eval.c:3447
#163 0x00d9d501 in rb_yield_0 (val=Variable "val" is not available.
) at eval.c:4991
#164 0x00d9e7a2 in rb_yield (val=3066708100) at eval.c:5073
#165 0x00d7f14a in rb_ary_each (ary=3066707820) at array.c:1138
#166 0x00d900c7 in call_cfunc (func=0xd7f10c <rb_ary_each>, 
recv=3066707820, len=Variable "len" is not available.
) at eval.c:5662
#167 0x00d9a4dd in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5815
#168 0x00d9b106 in rb_call (klass=3086484700, recv=3066707820, mid=3841, 
argc=0, argv=0x0, scope=0, self=3083667360) at eval.c:6062
#169 0x00d97129 in rb_eval (self=3083667360, n=Variable "n" is not 
available.
) at eval.c:3447
#170 0x00d99e99 in rb_eval (self=3083667360, n=Variable "n" is not 
available.
) at eval.c:3177
#171 0x00d96f66 in rb_eval (self=3083667360, n=Variable "n" is not 
available.
) at eval.c:2919
#172 0x00d973a7 in rb_eval (self=3083667360, n=Variable "n" is not 
available.
) at eval.c:3101
#173 0x00d99674 in rb_eval (self=3083667360, n=Variable "n" is not 
available.
) at eval.c:3263
#174 0x00d99a62 in rb_eval (self=3083667360, n=Variable "n" is not 
available.
) at eval.c:3311
#175 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#176 0x00d9b106 in rb_call (klass=3082114880, recv=3083667360, 
mid=45561, argc=1, argv=0xbf9677b0, scope=1, self=3083667360) at eval.c:6062
#177 0x00d9723f in rb_eval (self=Variable "self" is not available.
) at eval.c:3462
#178 0x00d9d501 in rb_yield_0 (val=Variable "val" is not available.
) at eval.c:4991
#179 0x00da610a in rb_thread_start_0 (fn=0xd9da28 <rb_thread_yield>, 
arg=0xb6bec920, th=0x906cff8) at eval.c:11878
#180 0x00d8ffc8 in call_cfunc (func=0xda6190 <rb_thread_initialize>, 
recv=3065956660, len=Variable "len" is not available.
) at eval.c:5656
#181 0x00d9a4dd in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5815
#182 0x00d9b106 in rb_call (klass=3086499700, recv=3065956660, mid=2961, 
argc=1, argv=0xbf968540, scope=1, self=6) at eval.c:6062
#183 0x00d9ba0d in rb_obj_call_init (obj=3065956660, argc=1, 
argv=0xbf968540) at eval.c:7594
#184 0x00d9ba53 in rb_thread_s_new (argc=1, argv=0xbf968540, 
klass=3086499700) at eval.c:11991
#185 0x00d900d6 in call_cfunc (func=0xd9ba20 <rb_thread_s_new>, 
recv=3086499700, len=Variable "len" is not available.
) at eval.c:5659
#186 0x00d9a4dd in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5815
#187 0x00d9b106 in rb_call (klass=3086499680, recv=3086499700, mid=3353, 
argc=1, argv=0xbf968540, scope=0, self=3083667360) at eval.c:6062
#188 0x00d97129 in rb_eval (self=3083667360, n=Variable "n" is not 
available.
) at eval.c:3447
#189 0x00d99e99 in rb_eval (self=3083667360, n=Variable "n" is not 
available.
) at eval.c:3177
#190 0x00d98216 in rb_eval (self=3083667360, n=Variable "n" is not 
available.
) at eval.c:3638
#191 0x00d99674 in rb_eval (self=3083667360, n=Variable "n" is not 
available.
) at eval.c:3263
#192 0x00d973a7 in rb_eval (self=3083667360, n=Variable "n" is not 
available.
) at eval.c:3101
#193 0x00d9d501 in rb_yield_0 (val=Variable "val" is not available.
) at eval.c:4991
#194 0x00da610a in rb_thread_start_0 (fn=0xd9da28 <rb_thread_yield>, 
arg=0xb6c53544, th=0x8f46338) at eval.c:11878
#195 0x00d8ffc8 in call_cfunc (func=0xda6190 <rb_thread_initialize>, 
recv=3066377560, len=Variable "len" is not available.
) at eval.c:5656
#196 0x00d9a4dd in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5815
#197 0x00d9b106 in rb_call (klass=3086499700, recv=3066377560, mid=2961, 
argc=0, argv=0x0, scope=1, self=6) at eval.c:6062
#198 0x00d9ba0d in rb_obj_call_init (obj=3066377560, argc=0, argv=0x0) 
at eval.c:7594
#199 0x00d9ba53 in rb_thread_s_new (argc=0, argv=0x0, klass=3086499700) 
at eval.c:11991
#200 0x00d900d6 in call_cfunc (func=0xd9ba20 <rb_thread_s_new>, 
recv=3086499700, len=Variable "len" is not available.
) at eval.c:5659
#201 0x00d9a4dd in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5815
#202 0x00d9b106 in rb_call (klass=3086499680, recv=3086499700, mid=3353, 
argc=0, argv=0x0, scope=0, self=3083667360) at eval.c:6062
#203 0x00d97129 in rb_eval (self=3083667360, n=Variable "n" is not 
available.
) at eval.c:3447
#204 0x00d99e99 in rb_eval (self=3083667360, n=Variable "n" is not 
available.
) at eval.c:3177
#205 0x00d97f97 in rb_eval (self=3083667360, n=Variable "n" is not 
available.
) at eval.c:3648
#206 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#207 0x00d9b106 in rb_call (klass=3082114880, recv=3083667360, mid=5137, 
argc=0, argv=0x0, scope=0, self=3083668140) at eval.c:6062
#208 0x00d97129 in rb_eval (self=3083668140, n=Variable "n" is not 
available.
) at eval.c:3447
#209 0x00d9d501 in rb_yield_0 (val=Variable "val" is not available.
) at eval.c:4991
#210 0x00d9e7a2 in rb_yield (val=3066377740) at eval.c:5073
#211 0x00dae8e9 in each_i (key=3083666820, value=3083667360) at hash.c:1119
#212 0x00dadc74 in hash_foreach_iter (key=3083666820, value=3083667360, 
arg=0xbf96b2a8) at hash.c:170
---Type <return> to continue, or q <return> to quit---
#213 0x00df39cf in st_foreach (table=0x8a81cb0, func=0xdadc44 
<hash_foreach_iter>, arg=3214324392) at st.c:487
#214 0x00dadd88 in hash_foreach_call (arg=0xbf96b2a8) at hash.c:205
#215 0x00d95071 in rb_ensure (b_proc=0xdadd60 <hash_foreach_call>, 
data1=3214324392, e_proc=0xdadcfc <hash_foreach_ensure>, data2=3083668080)
    at eval.c:5456
#216 0x00daddf0 in rb_hash_foreach (hash=3083668080, func=0xdae8bc 
<each_i>, farg=0) at hash.c:223
#217 0x00dae918 in rb_hash_each (hash=3083668080) at hash.c:1147
#218 0x00d900c7 in call_cfunc (func=0xdae8f4 <rb_hash_each>, 
recv=3083668080, len=Variable "len" is not available.
) at eval.c:5662
#219 0x00d9a4dd in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5815
#220 0x00d9b106 in rb_call (klass=3086481680, recv=3083668080, mid=3841, 
argc=0, argv=0x0, scope=0, self=3083668140) at eval.c:6062
#221 0x00d97129 in rb_eval (self=3083668140, n=Variable "n" is not 
available.
) at eval.c:3447
#222 0x00d99e99 in rb_eval (self=3083668140, n=Variable "n" is not 
available.
) at eval.c:3177
#223 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#224 0x00d9b106 in rb_call (klass=3082166300, recv=3083668140, mid=5137, 
argc=0, argv=0x0, scope=0, self=3083729140) at eval.c:6062
#225 0x00d97129 in rb_eval (self=3083729140, n=Variable "n" is not 
available.
) at eval.c:3447
#226 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#227 0x00d9b106 in rb_call (klass=3084144640, recv=3083729140, mid=5137, 
argc=0, argv=0x0, scope=0, self=3083730060) at eval.c:6062
#228 0x00d97129 in rb_eval (self=3083730060, n=Variable "n" is not 
available.
) at eval.c:3447
#229 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#230 0x00d9b106 in rb_call (klass=3082266480, recv=3083730060, mid=5137, 
argc=1, argv=0xbf96ca00, scope=0, self=3086510500) at eval.c:6062
#231 0x00d97129 in rb_eval (self=3086510500, n=Variable "n" is not 
available.
) at eval.c:3447
#232 0x00d9904f in rb_eval (self=3086510500, n=Variable "n" is not 
available.
) at eval.c:3008
#233 0x00da529e in rb_load (fname=3084819400, wrap=0) at eval.c:6857
#234 0x00da53a1 in rb_f_load (argc=1, argv=0xbf96d650) at eval.c:6925
#235 0x00d900d6 in call_cfunc (func=0xda535c <rb_f_load>, 
recv=3086510500, len=Variable "len" is not available.
) at eval.c:5659
#236 0x00d9a4dd in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5815
#237 0x00d9b106 in rb_call (klass=3086515360, recv=3086510500, mid=9737, 
argc=1, argv=0xbf96d650, scope=3, self=6) at eval.c:6062
#238 0x00da01d5 in rb_call_super (argc=1, argv=0xbf96d650) at eval.c:6230
#239 0x00d9857d in rb_eval (self=3086510500, n=Variable "n" is not 
available.
) at eval.c:3509
#240 0x00d9d501 in rb_yield_0 (val=Variable "val" is not available.
) at eval.c:4991
#241 0x00d9880b in rb_eval (self=3084340100, n=Variable "n" is not 
available.
) at eval.c:3252
#242 0x00d99a62 in rb_eval (self=3084340100, n=Variable "n" is not 
available.
) at eval.c:3311
#243 0x00d99a62 in rb_eval (self=3084340100, n=Variable "n" is not 
available.
) at eval.c:3311
#244 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#245 0x00d9b106 in rb_call (klass=3084339860, recv=3084340100, 
mid=41161, argc=1, argv=0xbf96e7d0, scope=0, self=3086510500) at eval.c:6062
#246 0x00d97129 in rb_eval (self=3086510500, n=Variable "n" is not 
available.
) at eval.c:3447
#247 0x00d99e99 in rb_eval (self=3086510500, n=Variable "n" is not 
available.
) at eval.c:3177
#248 0x00d99674 in rb_eval (self=3086510500, n=Variable "n" is not 
available.
) at eval.c:3263
#249 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#250 0x00d9b106 in rb_call (klass=3086515500, recv=3086510500, mid=9737, 
argc=1, argv=0xbf96f3e0, scope=1, self=3086510500) at eval.c:6062
#251 0x00d9723f in rb_eval (self=Variable "self" is not available.
) at eval.c:3462
#252 0x00d99a62 in rb_eval (self=3086510500, n=Variable "n" is not 
available.
) at eval.c:3311
#253 0x00da529e in rb_load (fname=3082098120, wrap=0) at eval.c:6857
#254 0x00da5729 in rb_require_safe (fname=3082102840, safe=0) at eval.c:7213
#255 0x00da59c3 in rb_f_require (obj=3086510500, fname=3082105720) at 
eval.c:7106
#256 0x00d900b8 in call_cfunc (func=0xda59a0 <rb_f_require>, 
recv=3086510500, len=Variable "len" is not available.
) at eval.c:5665
#257 0x00d9a4dd in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5815
#258 0x00d9b106 in rb_call (klass=3086515380, recv=3086510500, 
mid=30129, argc=1, argv=0xbf970250, scope=1, self=3086510500) at eval.c:6062
#259 0x00d9723f in rb_eval (self=Variable "self" is not available.
) at eval.c:3462
#260 0x00d99674 in rb_eval (self=3086510500, n=Variable "n" is not 
available.
) at eval.c:3263
#261 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#262 0x00d9b106 in rb_call (klass=3086515360, recv=3086510500, mid=9745, 
argc=1, argv=0xbf970b90, scope=3, self=6) at eval.c:6062
#263 0x00da01d5 in rb_call_super (argc=1, argv=0xbf970b90) at eval.c:6230
#264 0x00d9857d in rb_eval (self=3086510500, n=Variable "n" is not 
available.
) at eval.c:3509
#265 0x00d9d501 in rb_yield_0 (val=Variable "val" is not available.
) at eval.c:4991
#266 0x00d9880b in rb_eval (self=3084340100, n=Variable "n" is not 
available.
) at eval.c:3252
#267 0x00d99a62 in rb_eval (self=3084340100, n=Variable "n" is not 
available.
) at eval.c:3311
#268 0x00d99a62 in rb_eval (self=3084340100, n=Variable "n" is not 
available.
) at eval.c:3311
#269 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#270 0x00d9b106 in rb_call (klass=3084339860, recv=3084340100, 
mid=41161, argc=1, argv=0xbf971d10, scope=0, self=3086510500) at eval.c:6062
#271 0x00d97129 in rb_eval (self=3086510500, n=Variable "n" is not 
available.
) at eval.c:3447
#272 0x00d99e99 in rb_eval (self=3086510500, n=Variable "n" is not 
available.
) at eval.c:3177
#273 0x00d99674 in rb_eval (self=3086510500, n=Variable "n" is not 
available.
) at eval.c:3263
#274 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#275 0x00d9b106 in rb_call (klass=3086515500, recv=3086510500, mid=9745, 
argc=1, argv=0xbf972920, scope=1, self=3086510500) at eval.c:6062
#276 0x00d9723f in rb_eval (self=Variable "self" is not available.
) at eval.c:3462
#277 0x00da529e in rb_load (fname=3084709760, wrap=0) at eval.c:6857
#278 0x00da5729 in rb_require_safe (fname=3086445780, safe=0) at eval.c:7213
#279 0x00da59c3 in rb_f_require (obj=3086510500, fname=3084895880) at 
eval.c:7106
#280 0x00d900b8 in call_cfunc (func=0xda59a0 <rb_f_require>, 
recv=3086510500, len=Variable "len" is not available.
) at eval.c:5665
#281 0x00d9a4dd in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5815
#282 0x00d9b106 in rb_call (klass=3086515380, recv=3086510500, 
mid=30129, argc=1, argv=0xbf9733a0, scope=1, self=3086510500) at eval.c:6062
---Type <return> to continue, or q <return> to quit---
#283 0x00d9723f in rb_eval (self=Variable "self" is not available.
) at eval.c:3462
#284 0x00d99674 in rb_eval (self=3086510500, n=Variable "n" is not 
available.
) at eval.c:3263
#285 0x00d9adbf in rb_call0 (klass=Variable "klass" is not available.
) at eval.c:5966
#286 0x00d9b106 in rb_call (klass=3086515360, recv=3086510500, mid=9745, 
argc=1, argv=0xbf973ca0, scope=1, self=3086510500) at eval.c:6062
#287 0x00d9723f in rb_eval (self=Variable "self" is not available.
) at eval.c:3462
#288 0x00da4345 in ruby_exec_internal () at eval.c:1608
#289 0x00da4381 in ruby_exec () at eval.c:1628
#290 0x00da629c in ruby_run () at eval.c:1638
#291 0x08048669 in main (argc=Could not find the frame base for "main".
) at main.c:48

Dan Janowski wrote:
> Calvin,
>
> This bug took some time to find, but I got it. XPath was probably the  
> best way to expose it, since it had to do with random access to nodes  
> (really freeing them, but what's the difference). It would have had  
> an impact somewhere else for sure.
>
> It is all committed and an update should yield #187. Give it a try  
> (one more time).
>
> Hopeful you will report all clear.
>
> Dan
>
>
>   
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