gdb64 crash

[Bin Zhang_1]

gdb64 coredumps when I try to debug a particular program that is compiled with aCC. The program calls fortran90 libraries and does use pthreads. DDE is able to debug this program successively, though it gives lots of warnings like "A CLASS symbol was not found where it was expected (DNTT index 0x1f0aff)".

gdb64 prints out the following messages before it dies:
Detected 64-bit executable.
Invoking /opt/langtools/bin/gdb64.
HP gdb 2.1
Copyright 1986 - 1999 Free Software Foundation, Inc.
Hewlett-Packard Wildebeest 2.1 (based on GDB 5.0-hpwdb-20000630)
Wildebeest is free software, covered by the GNU General Public License, and
you are welcome to change it and/or distribute copies of it under certain
conditions. Type "show copying" to see the conditions. There is
absolutely no warranty for Wildebeest. Type "show warranty" for details.
Wildebeest was built for PA-RISC 2.0 (wide), HP-UX 11.00.
..( 0) 0x00061358 backtrace_command + 0x148 [/opt/langtools/bin/gdb]
( 1) 0x0026a3b8 __localtime64_r + 0x80 [/opt/langtools/bin/gdb]
( 2) 0x000fe81c annotate_arg_name_end + 0x1c [/opt/langtools/bin/gdb]
( 3) 0x00144798 elfread_add_partial_subspace_map_entry + 0x98 [/opt/langtools/bin/gdb]
( 4) 0x00068a50 reread_symbols + 0x480 [/opt/langtools/bin/gdb]
( 5) 0x00068fa8 init_filename_language_table + 0xa0 [/opt/langtools/bin/gdb]
( 6) 0x00069138 allocate_symtab + 0x20 [/opt/langtools/bin/gdb]
( 7) 0x00069268 allocate_psymtab + 0x10 [/opt/langtools/bin/gdb]
( 8) 0x00072f70 do_nothing + 0x8 [/opt/langtools/bin/gdb]
( 9) 0x00072ee8 stop_sig + 0x18 [/opt/langtools/bin/gdb]
(10) 0x00072fd8 init_signals + 0x28 [/opt/langtools/bin/gdb]
(11) 0x00060cfc frame_info + 0x32c [/opt/langtools/bin/gdb]
(12) 0x00072ee8 stop_sig + 0x18 [/opt/langtools/bin/gdb]
(13) 0x00060ec0 frame_info + 0x4f0 [/opt/langtools/bin/gdb]
(14) 0x0021260c qsort + 0x190 [/opt/langtools/bin/gdb]
(15) 0x0005f310 captured_main + 0x918 [/opt/langtools/bin/gdb]


Any ideas what's going on?

Thanks