Daniel Jacobowitz wrote:
> The interesting question isn't where it gets switched, but where we're
> expecting the wrong contents.  If we're accessing uiout.data->buffer
> then we must have reached mi_out_put.  So where from, and how did we
> get there without switching the global uiout back to MI's? 
> mi_cmd_interpreter_exec ought to be doing that on the way out.

This is the backtrace from the core dump file:

#0  0x0805a220 in ui_file_put (file=0x19, write=0x80863f8 <do_write>, 
dest=0xa030f18)
     at ../../src/gdb/ui-file.c:192
#1  0x0808642a in mi_out_put (uiout=0xa028b90, stream=0xa030f18)
     at ../../src/gdb/mi/mi-out.c:376
#2  0x0808adc9 in mi_load_progress (section_name=0xa11f79f ".init", 
sent_so_far=54,
     total_section=54, total_sent=54, grand_total=523177) at 
../../src/gdb/mi/mi-main.c:1402
#3  0x080c4857 in load_section_callback (abfd=0xa0a5278, asec=0x36, 
data=0xbfffb930)
     at ../../src/gdb/symfile.c:1597
#4  0x0818c69d in bfd_map_over_sections (abfd=0xa0a5278,
     operation=0x80c4670 <load_section_callback>, user_storage=0xbfffb930)
     at ../../src/bfd/section.c:1226
#5  0x080c4a17 in generic_load (args=0xbfffb930 "", from_tty=1) at 
../../src/gdb/symfile.c:1670
#6  0x080edf1f in target_load (arg=0xa0322b0 
"/home/afra/users/stubbsa/os21test-microdev",
     from_tty=1) at ../../src/gdb/target.c:268

mi_load_progress is actually called through the function pointer 
deprecated_show_load_progress.

The problem appears to be that the program is finding it's way into the 
MI through deprecated_show_load_progress when uiout is not set as expected.

The problem only occurs in -i=mi (no number) and -i=mi1 because 
mi_load_progress does not do anything in other versions. Strangely -i=mi 
is supposed to be the same as -i=mi2, but it isn't in this respect.

I attach a patch which fixes both the crash and the inconsistency. I 
have tested it and got no unexpected failures. Of course I doubt the 
testsuite covers this feature ...

OK? I would like to see this issued fixed in 6.4 also.

Andrew Stubbs