c2_baseline nightly tests mostly failed with a stack trace that looks
like:

dbx) where
current thread: t@1
=>[1] _lwp_kill(0x0, 0x6, 0x0, 0x6, 0xffff0000, 0x0), at 0xff33d5ec
  [2] raise(0x6, 0x0, 0xff321af4, 0x42770, 0xff364278, 0x6), at 0xff2dd884
  [3] abort(0xffbfd680, 0x1, 0xfe0037f4, 0xa6544, 0xff367298, 0x0), at 0xff2bde38
  [4] os::abort(0x30400, 0xffbfd680, 0xfe0037c8, 0xff00f220, 0xff00f220, 0x1), at 0xfdff8608
  [5] VMError::report_and_die(0x2e000, 0xff025bc2, 0xfeeffcb2, 0xfef5e084, 0xff025bc2, 0x1), at 0xfe2e2614
  [6] JVM_handle_solaris_signal(0x21c00, 0x21f54, 0xffbfda00, 0x1, 0x4fb00, 0xfd7d93c0), at 0xfe001fec
  [7] __sighndlr(0xb, 0xffbfdcb8, 0xffbfda00, 0xfdffe248, 0x0, 0x1), at 0xff33c52c
  ---- called from signal handler with signal 11 (SIGSEGV) ------
  [8] CompileBroker::compilation_is_prohibited(0x4fec0, 0x1c, 0x30708, 0xffbfdf44, 0x502ac, 0xfef807d4), at 0xfd7d93c0
  [9] CompileBroker::compile_method(0x1c, 0xd680a120, 0xffbfdffc, 0x2f, 0xfe6024a0, 0x4fb00), at 0xfd7d76c4
  [10] SimpleCompPolicy::method_back_branch_event(0xffbfe160, 0x1c, 0xfe6024a0, 0x2f, 0x4fb00, 0x1), at 0xfd7bd3fc
  [11] InterpreterRuntime::frequency_counter_overflow(0x2ef9c, 0x2c590, 0x4fb00, 0x2c400, 0xffbfe164, 0xfefef9c3), at 0xfd9da408
  [12] 0xfb028148(0xf0014ca8, 0xb6, 0xd6894630, 0xfb02
###@###.### 2005-07-20 16:41:47 GMT