ATG phase ideal loop SEGV

Method:
class=atg/core/net/URLHammerThread
name=run
signature=()V

[8] PhaseIdealLoop::get_loop(this = 0xd8d00b7c, n = (nil)), line 389 in
"loopnode.hpp"
  [9] PhaseIdealLoop::transform_lite(this = 0xd8d00b7c), line 1287 in
"loopopts.cpp"
  [10] IfNode::dominated_by(this = 0x29703c, prev_dom = 0x294620, igvn =
0xd8d00c1c, pil = 0xd8d00b7c), line 1557 in "cfgnode.cpp"
=>[11] PhaseIdealLoop::split_if_with_blocks_post(this = 0xd8d00b7c, n =
0x29703c), line 1145 in "loopopts.cpp"
  [12] PhaseIdealLoop::split_if_with_blocks(this = 0xd8d00b7c, n = 0x29703c,
visited = CLASS), line 959 in "loopopts.cpp"
  [13] PhaseIdealLoop::split_if_with_blocks(this = 0xd8d00b7c, n = 0x294d40,
visited = CLASS), line 955 in "loopopts.cpp"
  [14] PhaseIdealLoop::split_if_with_blocks(this = 0xd8d00b7c, n = 0x296f6c,
visited = CLASS), line 955 in "loopopts.cpp