[ASSERTION] w32term.c/w32_per_char_metric

[David Abrahams]

The title function asserts in GLYPH_DEBUG mode.  At this point I am
stuck and need some help figuring out what's going wrong.

The assertion is:

  xassert (font_type != UNKNOWN_FONT);

The stack trace is:

        ntdll.dll!77f75a58()    
        emacs.exe!w32_abort()  Line 14621 + 0x8 C
>       emacs.exe!w32_per_char_metric(W32FontStruct * font=0x018d3500, unsigned 
> short * char2b=0x0082dc28, int font_type=0x00000000)  Line 898 + 0xb    C
        emacs.exe!x_get_glyph_overhangs(glyph * glyph=0x01934014, frame * 
f=0x01629c00, int * left=0x0082dca4, int * right=0x0082dc98)  Line 16822 + 0x26 
      C
        emacs.exe!w32_get_glyph_overhangs()  Line 1358 + 0x15   C
        emacs.exe!update_text_area(window * w=0x01629a00, int vpos=0x00000005)  
Line 4351 + 0x23        C
        emacs.exe!update_window_line(window * w=0x01629a00, int 
vpos=0x00000005, int * mouse_face_overwritten_p=0x0082dd48)  Line 4490 + 0xd    
C
        emacs.exe!update_window(window * w=0x01629a00, int force_p=0x00000001)  
Line 4147 + 0x11        C
        emacs.exe!update_window_tree(window * w=0x01629a00, int 
force_p=0x00000000)  Line 3881 + 0xd    C
        emacs.exe!update_frame(frame * f=0x01629c00, int force_p=0x00000000, 
int inhibit_hairy_id_p=0x00000000)  Line 3818 + 0xd        C
        emacs.exe!redisplay_internal(int preserve_echo_area=0x00000001)  Line 
10052 + 0x10      C
        emacs.exe!redisplay_preserve_echo_area(int from_where=0x00000008)  Line 
10249 + 0x7     C
        emacs.exe!detect_input_pending_run_timers(int do_display=0x00000001)  
Line 9913 + 0x7   C
        emacs.exe!wait_reading_process_input(int time_limit=0x00000000, int 
microsecs=0x00000000, int read_kbd=0x0fffffff, int do_display=0x00000001)  Line 
4116 + 0x9  C
        emacs.exe!kbd_buffer_get_event()  Line 3847 + 0xf       C
        emacs.exe!read_char(int commandflag=0x00000001, int nmaps=0x00000002, 
int * maps=0x0082e6c4, int prev_event=0x11377c04, int * 
used_mouse_menu=0x0082e884)  Line 2810 + 0x10     C
        emacs.exe!read_key_sequence(int * keybuf=0x0082ea18, int 
bufsize=0x0000001e, int prompt=0x11377c04, int dont_downcase_last=0x00000000, 
int can_return_switch_frame=0x00000001, int fix_current_buffer=0x00000001)  
Line 8827 + 0x2a     C
        emacs.exe!command_loop_1()  Line 1505 + 0x1b    C
        emacs.exe!internal_condition_case(int (void)* bfun=0x01017690, int 
handlers=0x1139ce44, int (void)* hfun=0x01017160)  Line 1333 + 0x5   C
        emacs.exe!command_loop_2()  Line 1292 + 0x15    C
        emacs.exe!internal_catch(int tag=0x113a4d6c, int (void)* 
func=0x010174e0, int arg=0x11377c04)  Line 1094 + 0x9  C
        emacs.exe!command_loop()  Line 1263 + 0x17      C
        emacs.exe!recursive_edit_1()  Line 987 + 0x5    C
        emacs.exe!Frecursive_edit()  Line 1044  C
        emacs.exe!Ffuncall(int nargs=0x00000001, int * args=0x0082ec7c)  Line 
2721 + 0xe        C
        emacs.exe!Fbyte_code(int bytestr=0x312f6300, int vector=0x412f6360, int 
maxdepth=0x00000006)  Line 710 + 0x10   C
        emacs.exe!Feval(int form=0x512f62f0)  Line 2085 + 0x22  C
        emacs.exe!internal_catch(int tag=0x115d065c, int (void)* 
func=0x0114eaa0, int arg=0x512f62f0)  Line 1094 + 0x9  C
        emacs.exe!Fbyte_code(int bytestr=0x312f6174, int vector=0x412f61bc, int 
maxdepth=0x00000006)  Line 873 + 0x14   C
        emacs.exe!funcall_lambda(int fun=0x412f6158, int nargs=0x00000000, int 
* arg_vector=0x0082f234)  Line 2913 + 0x2b       C
        emacs.exe!Ffuncall(int nargs=0x00000001, int * args=0x0082f230)  Line 
2772 + 0x14       C
        emacs.exe!Fbyte_code(int bytestr=0x312f7740, int vector=0x412f7764, int 
maxdepth=0x00000001)  Line 710 + 0x10   C
        emacs.exe!funcall_lambda(int fun=0x412f7720, int nargs=0x00000000, int 
* arg_vector=0x0082f48c)  Line 2913 + 0x2b       C
        emacs.exe!Ffuncall(int nargs=0x00000001, int * args=0x0082f488)  Line 
2772 + 0x14       C
        emacs.exe!Fbyte_code(int bytestr=0x312f791c, int vector=0x412f7d58, int 
maxdepth=0x0000000c)  Line 710 + 0x10   C
        emacs.exe!funcall_lambda(int fun=0x412f78fc, int nargs=0x00000001, int 
* arg_vector=0x0082f710)  Line 2913 + 0x2b       C
        emacs.exe!Ffuncall(int nargs=0x00000002, int * args=0x0082f70c)  Line 
2772 + 0x14       C
        emacs.exe!Fbyte_code(int bytestr=0x312f3f88, int vector=0x412f4430, int 
maxdepth=0x00000006)  Line 710 + 0x10   C
        emacs.exe!funcall_lambda(int fun=0x412f3f70, int nargs=0x00000000, int 
* arg_vector=0x0082f97c)  Line 2913 + 0x2b       C
        emacs.exe!Ffuncall(int nargs=0x00000001, int * args=0x0082f978)  Line 
2772 + 0x14       C
        emacs.exe!Fbyte_code(int bytestr=0x312f2c68, int vector=0x412f2d00, int 
maxdepth=0x00000006)  Line 710 + 0x10   C
        emacs.exe!funcall_lambda(int fun=0x412f2c50, int nargs=0x00000000, int 
* arg_vector=0x0082fb8c)  Line 2913 + 0x2b       C
        emacs.exe!apply_lambda(int fun=0x412f2c50, int args=0x11377c04, int 
eval_flag=0x00000001)  Line 2833 + 0x17     C
        emacs.exe!Feval(int form=0x51542734)  Line 2120 + 0xf   C
        emacs.exe!top_level_2()  Line 1301 + 0xb        C
        emacs.exe!internal_condition_case(int (void)* bfun=0x01017530, int 
handlers=0x1139ce44, int (void)* hfun=0x01017160)  Line 1333 + 0x5   C
        emacs.exe!top_level_1()  Line 1309 + 0x16       C
        emacs.exe!internal_catch(int tag=0x11392404, int (void)* 
func=0x01017550, int arg=0x11377c04)  Line 1094 + 0x9  C
        emacs.exe!command_loop()  Line 1270 + 0x18      C
        emacs.exe!recursive_edit_1()  Line 987 + 0x5    C
        emacs.exe!Frecursive_edit()  Line 1044  C
        emacs.exe!main()  Line 1668     C
        emacs.exe!mainCRTStartup()  Line 259 + 0x12     C
        emacs.exe!_start()  Line 131    C
        kernel32.dll!77e814c7()         
        shlwapi.dll!70a71a29()  

and the locals are:

+       font    0x018d3500 {font_type=UNKNOWN_FONT tm={tmHeight=0x0000000f 
tmAscent=0x0000000c tmDescent=0x00000003 ...} hfont=0x0d0a0d76 {unused=??? } 
...}    W32FontStruct *
+       char2b  0x0082dc28 "m????t???????e???T?????????C???T????????5"  
unsigned short *
        font_type       0x00000000      int
        retval  0xcccccccc      int
+       pcm     0xcccccccc {rbearing=??? lbearing=??? width=??? ...}    
_XCharStruct *

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com