Re: Current emacs blows up on OSX if any control key is pressed

[chad <yandros@gmail.com>]

On Jan 10, 2010, at 5:56 PM, Randal L. Schwartz wrote:

>>>>>> "David" == David Reitter <david.reitter@gmail.com> writes:
> 
> David> On Jan 10, 2010, at 7:41 PM, Randal L. Schwartz wrote:
>>> 
>>> Some change between Jan 6 and now causes emacs to blow up on OSX
>>> if any control key is pressed.
> 
> David> Is that the NS port, I take it?
> 
> Yes, using the NS stuff.
> 
> David> I just merged the latest changes in and, at least with my branch, I'm
> David> not getting any such problems.
> 
> I'm on Leopard, not Snow Leopard.  I did see some recent changes
> to src/nsterm.m that talked about modifier keys.

I saw the same thing, poked at it a little while, and got as far as verifying that reverting Chong Yidong's change to src/nsterm.m fixes the problem but not so far as to figure out why.  This is the first time I've been back to email since, and I don't expect to have time to dig for several days, sadly.  I'm building on Snow Leopard (configure --with-ns), in case it matters.

The actual crash is in keyboard.c, in a call to parse_solitary_modifer().  It gets called a few times successfully on startup, and then after all the init is done it tries to pass a zero to SREF() for the switch; I presume because of the init changes in nsterm.m.

I hope this helps.

*Chad


Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_INVALID_ADDRESS at address: 0x0000000000000008
0x00000001000979d8 in parse_solitary_modifier (symbol=0) at keyboard.c:6909
6909	  switch (SREF (name, 0))
(gdb) where
#0  0x00000001000979d8 in parse_solitary_modifier (symbol=0) at keyboard.c:6909
#1  0x0000000100169dab in -[EmacsView keyDown:] (self=0x1008ebf60, _cmd=<value temporarily unavailable, due to optimizations>, theEvent=0x116b4c700) at nsterm.m:4435
#2  0x000000010017bf96 in -[EmacsMenu performKeyEquivalent:] (self=0x0, _cmd=0x7fff80bde7e8, theEvent=0x50f) at nsmenu.m:592
#3  0x00007fff80637db1 in -[NSApplication _handleKeyEquivalent:] ()
#4  0x00007fff805089e1 in -[NSApplication sendEvent:] ()
#5  0x0000000100167b36 in -[EmacsApp sendEvent:] (self=0x10072a590, _cmd=<value temporarily unavailable, due to optimizations>, theEvent=0x116b4c700) at nsterm.m:3977
#6  0x00007fff8049f796 in -[NSApplication run] ()
#7  0x000000010016ab80 in ns_read_socket (terminal=<value temporarily unavailable, due to optimizations>, expected=0, hold_quit=0x7fff5fbfea40) at nsterm.m:3126
#8  0x0000000100097075 in read_avail_input (expected=0) at keyboard.c:7156
#9  0x0000000100097954 in gobble_input (expected=0) at keyboard.c:7067
#10 0x0000000100098d56 in get_input_pending (addr=0x100533378, flags=1) at keyboard.c:7035
#11 0x0000000100098fb2 in swallow_events (do_display=1) at keyboard.c:4468
#12 0x000000010000514b in sit_for (timeout=120, reading=1, do_display=1) at dispnew.c:6622
#13 0x000000010009ead2 in read_char (commandflag=1, nmaps=4, maps=0x7fff5fbfef10, prev_event=4320133130, used_mouse_menu=0x7fff5fbff064, end_time=0x0) at keyboard.c:2970
#14 0x00000001000a03bf in read_key_sequence (keybuf=0x7fff5fbff100, bufsize=30, prompt=4320133130, dont_downcase_last=0, can_return_switch_frame=1, fix_current_buffer=1) at keyboard.c:9502
#15 0x00000001000a293b in command_loop_1 () at keyboard.c:1643
#16 0x0000000100106857 in internal_condition_case (bfun=0x1000a26f0 <command_loop_1>, handlers=4320204170, hfun=0x10009aaa0 <cmd_error>) at eval.c:1490
#17 0x0000000100099e27 in command_loop_2 () at keyboard.c:1360
#18 0x0000000100106960 in internal_catch (tag=<value temporarily unavailable, due to optimizations>, func=0x100099df0 <command_loop_2>, arg=4320133130) at eval.c:1226
#19 0x000000010009a8b6 in command_loop () at keyboard.c:1339
#20 0x000000010009ad1f in recursive_edit_1 () at keyboard.c:954
#21 0x000000010009aebf in Frecursive_edit () at keyboard.c:1016
#22 0x0000000100090477 in main (argc=1, argv=0x7fff5fbff6d0) at emacs.c:1833