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[Bug gdb/16201] internal error on a cygwin program linked against a DLL with no .data section


https://sourceware.org/bugzilla/show_bug.cgi?id=16201

--- Comment #11 from Stas Maximov <smaximov at yahoo dot com> ---
Hi Tom, thanks to Keith's suggestion, here is the backtrace for the point of
failure:

$ gdb --args /usr/local/bin/gdb test1.exe 
GNU gdb (GDB) 7.6.50.20130728-cvs (cygwin-special)
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i686-pc-cygwin".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word".
..
Reading symbols from /usr/local/bin/gdb...done.
(gdb) b internal_error
Breakpoint 1 at 0x5cb530: file ../../gdb-7.6.50-4/gdb/utils.c, line 839.
(gdb) ru
Starting program: /usr/local/bin/gdb test1.exe
[New Thread 14808.0x1d60]
[New Thread 14808.0x3b6c]
GNU gdb (GDB) 7.6.50.20130728-cvs (cygwin-special)
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i686-pc-cygwin".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word".
..
Reading symbols from /home/user/test/test1.exe...done.
(gdb) [New Thread 14808.0xb44]
[New Thread 14808.0x3514]
run
run
Starting program: /home/user/test/test1.exe 
[New Thread 14704.0x2bcc]

Breakpoint 1, internal_error (file=file@entry=0x729c38
<__PRETTY_FUNCTION__.21996+1640> "../../gdb-7.6.50-4/gdb/minsyms.c", 
    line=line@entry=885, string=0x729dd8 <__PRETTY_FUNCTION__.21996+2056>
"sect_index_data not initialized")
    at ../../gdb-7.6.50-4/gdb/utils.c:839
839     {
(gdb) bt
#0  internal_error (file=file@entry=0x729c38 <__PRETTY_FUNCTION__.21996+1640>
"../../gdb-7.6.50-4/gdb/minsyms.c", 
    line=line@entry=885, string=0x729dd8 <__PRETTY_FUNCTION__.21996+2056>
"sect_index_data not initialized")
    at ../../gdb-7.6.50-4/gdb/utils.c:839
#1  0x00545c86 in prim_record_minimal_symbol (name=name@entry=0x801a7f38
"icudt49!icudt49_dat", 
    address=address@entry=1645875200, ms_type=mst_data,
objfile=objfile@entry=0x803e8c60)
    at ../../gdb-7.6.50-4/gdb/minsyms.c:885
#2  0x005501ce in add_pe_exported_sym (sym_name=0x8019f156 "icudt49_dat",
func_rva=<optimized out>, ordinal=<optimized out>, 
    section_data=0x801a7e8c, dll_name=dll_name@entry=0x8019f14a "icudt49",
objfile=0x803e8c60)
    at ../../gdb-7.6.50-4/gdb/coff-pe-read.c:178
#3  0x00550ad5 in read_pe_exported_syms (objfile=objfile@entry=0x803e8c60) at
../../gdb-7.6.50-4/gdb/coff-pe-read.c:585
#4  0x0054fbf2 in coff_symtab_read (objfile=0x803e8c60, nsyms=0,
symtab_offset=<optimized out>)
    at ../../gdb-7.6.50-4/gdb/coffread.c:1187
#5  coff_symfile_read (objfile=0x803e8c60, symfile_flags=8) at
../../gdb-7.6.50-4/gdb/coffread.c:646
#6  0x004e8c9b in read_symbols (objfile=objfile@entry=0x803e8c60,
add_flags=add_flags@entry=8)
    at ../../gdb-7.6.50-4/gdb/symfile.c:830
#7  0x004e8879 in syms_from_objfile_1 (add_flags=8, addrs=0x80166a40,
objfile=0x803e8c60)
    at ../../gdb-7.6.50-4/gdb/symfile.c:998
#8  syms_from_objfile (add_flags=8, addrs=0x80166a40, objfile=0x803e8c60) at
../../gdb-7.6.50-4/gdb/symfile.c:1014
#9  symbol_file_add_with_addrs (abfd=<optimized out>, add_flags=8,
addrs=addrs@entry=0x80166a40, flags=2, parent=0x0)
    at ../../gdb-7.6.50-4/gdb/symfile.c:1109
#10 0x004e8d31 in symbol_file_add_from_bfd (abfd=<optimized out>,
add_flags=<optimized out>, add_flags@entry=8, 
    addrs=addrs@entry=0x80166a40, flags=flags@entry=2, parent=parent@entry=0x0)
at ../../gdb-7.6.50-4/gdb/symfile.c:1196
#11 0x005dd5fe in solib_read_symbols (so=so@entry=0x80199200,
flags=flags@entry=8) at ../../gdb-7.6.50-4/gdb/solib.c:611
#12 0x005dda91 in solib_add (pattern=pattern@entry=0x0,
from_tty=from_tty@entry=0, 
    target=target@entry=0x877cc0 <current_target>, readsyms=1) at
../../gdb-7.6.50-4/gdb/solib.c:922
#13 0x004f636b in post_create_inferior (target=0x877cc0 <current_target>,
from_tty=from_tty@entry=0)
    at ../../gdb-7.6.50-4/gdb/infcmd.c:451
#14 0x004f69c7 in run_command_1 (args=0x0, from_tty=<optimized out>,
tbreak_at_main=<optimized out>)
    at ../../gdb-7.6.50-4/gdb/infcmd.c:603
#15 0x005c773e in execute_command (p=<optimized out>, p@entry=0x8003acf8 "",
from_tty=1) at ../../gdb-7.6.50-4/gdb/top.c:478
#16 0x00516238 in command_handler (command=0x8003acf8 "") at
../../gdb-7.6.50-4/gdb/event-top.c:433
#17 0x005165c1 in command_line_handler (rl=0x80161e60 "") at
../../gdb-7.6.50-4/gdb/event-top.c:631
#18 0x0060987e in rl_callback_read_char () at
../../gdb-7.6.50-4/readline/callback.c:220
#19 0x005162a8 in rl_callback_read_char_wrapper (client_data=0x0) at
../../gdb-7.6.50-4/gdb/event-top.c:164
#20 0x0051484e in handle_file_event (data=data@entry=...) at
../../gdb-7.6.50-4/gdb/event-loop.c:768
#21 0x00514fa4 in process_event () at ../../gdb-7.6.50-4/gdb/event-loop.c:342
#22 0x005152a7 in gdb_do_one_event () at
../../gdb-7.6.50-4/gdb/event-loop.c:394
#23 0x005154ee in start_event_loop () at
../../gdb-7.6.50-4/gdb/event-loop.c:431
#24 0x0050f282 in captured_command_loop (data=0x0) at
../../gdb-7.6.50-4/gdb/main.c:260
#25 0x0050d959 in catch_errors (func=func@entry=0x50f270
<captured_command_loop>, func_args=func_args@entry=0x0, 
    errstring=errstring@entry=0x70e766 <__PRETTY_FUNCTION__.13081+203> "",
mask=mask@entry=6)
    at ../../gdb-7.6.50-4/gdb/exceptions.c:546
#26 0x00510089 in captured_main (data=0x2dbabe0) at
../../gdb-7.6.50-4/gdb/main.c:1057
#27 0x0050d959 in catch_errors (func=func@entry=0x50f540 <captured_main>,
func_args=func_args@entry=0x2dbabe0, 
    errstring=errstring@entry=0x70e766 <__PRETTY_FUNCTION__.13081+203> "",
mask=mask@entry=6)
    at ../../gdb-7.6.50-4/gdb/exceptions.c:546
#28 0x005105b0 in gdb_main (args=args@entry=0x2dbabe0) at
../../gdb-7.6.50-4/gdb/main.c:1066
#29 0x006a4bc8 in main (argc=2, argv=0x2dbac1c) at
../../gdb-7.6.50-4/gdb/gdb.c:34
(gdb)

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