Customer encuntered a crash when C2 is in compilation. Stack trace:

(dbx) where
current thread: t@20
  [1] __lwp_kill(0x14, 0x6), at 0xfef10d77
  [2] raise(0x6), at 0xfeebd093
  [3] abort(0xfecb8000, 0xf23da5a8, 0xf23da5a8, 0xfeb7d838, 0x1, 0x82d5000), at 0xfeea0b29
  [4] os::abort(0x1), at 0xfead7440
  [5] VMError::report_and_die(0xf23da740), at 0xfeb7d838
  [6] JVM_handle_solaris_signal(0xb, 0xf23daa5c, 0xf23da85c, 0x1), at 0xfe71bf0b
  [7] signalHandler(0xb, 0xf23daa5c, 0xf23da85c), at 0xfe71b7c2
  [8] __sighndlr(0xb, 0xf23daa5c, 0xf23da85c, 0xfe71b79c), at 0xfef1013f
  [9] call_user_handler(0xb, 0xf23daa5c, 0xf23da85c), at 0xfef066ed
  [10] sigacthandler(0xb, 0xf23daa5c, 0xf23da85c, 0xf, 0x0, 0x4), at 0xfef0686d
  ---- called from signal handler with signal 11 (SIGSEGV) ------
=>[11] PhaseIdealLoop::idom_no_update(0xf23db494, 0x83c4fd0), at 0xfe6c9d45
  [12] PhaseIdealLoop::clone_loop(0xf23db494, 0x83e2888, 0xf23dacc0, 0x16, 0x0), at 0xfeaa47c4
  [13] PhaseIdealLoop::do_unroll(0xf23db494, 0x83e2888, 0xf23dacc0, 0x1), at 0xfea9ee58
  [14] IdealLoopTree::iteration_split_impl(0x83e2888, 0xf23db494, 0xf23dacc0), at 0xfe70c992
  [15] IdealLoopTree::iteration_split(0x83e28c8, 0xf23db494, 0xf23dacc0), at 0xfe73b12d
  [16] PhaseIdealLoop::PhaseIdealLoop(0xf23db494, 0xf23dae70, 0x0, 0x0), at 0xfeaa28b6
  [17] Compile::Optimize(0xf23dc4e0), at 0xfe7592a4
  [18] Compile::Compile(0xf23dc4e0, 0xf23dc9d0, 0x806d788, 0x84a3aa0, 0xffffffff, 0x1), at 0xfe90cf66
  [19] C2Compiler::compile_method(0x806d788, 0xf23dc9d0, 0x84a3aa0, 0xffffffff), at 0xfe755fd6
  [20] CompileBroker::invoke_compiler_on_method(0x82f0038), at 0xfe7564d7
  [21] CompileBroker::compiler_thread_loop(0xfecb8000, 0x98, 0xf23dcbc8, 0xfe7811d8, 0x82d5000, 0x82d5000), at 0xfe7b799c
  [22] compiler_thread_entry(0x82d5000, 0x82d5000), at 0xfe7b9760
  [23] JavaThread::thread_main_inner(0x82d5000), at 0xfe7811d8
  [24] JavaThread::run(0x82d5000), at 0xfe781182
  [25] java_start(0x82d5000), at 0xfead6d62
  [26] _thr_setup(0xfe244400), at 0xfef0fd52
  [27] _lwp_start(), at 0xfef10040
This is the minimal test case from the other bug.

public class crash {
    public static void main(String[] args) {
        for (int i = 0; i < 100000; i++) {
            intToLeftPaddedAsciiBytes();
        }
    }

    public static int intToLeftPaddedAsciiBytes() {
        int offset = 40;
        int q;
        int r;
        int         i   = 100;
        int result = 1;
        while (offset > 0) {
            q = (i * 52429) >>> (16+3);
            r = i - (q * 10);
            offset--;
            i = q;
            if (i == 0) {
                break;
            }
        }
        if (offset > 0) {
            for(int j = 0; j < offset; j++) {
                result++;
            }
        }
        return result;
    }


}