When using %! item in 'statusline' option, Vim sometimes shows an error
and sometimes crash.
vimrc.vim:
set statusline=%!MyStatusLine()
set laststatus=2
function MyStatusLine()
return ""
endfunction
$ gvim -u vimrc.vim
Error detected while processing function MyStatusLine:
E121: Undefined variable: MyStatusLine
Error detected while processing function MyStatusLine:
E15: Invalid expression: MyStatusLine
E15: Invalid expression: ~W^Iá3~L (message is random text)
I am using GTK2 GUI. I saw the error at startup and when using
scrollbar.
The error can be reproduced by using :redraw! command in MyStatusLine().
function MyStatusLine()
redraw!
return ""
endfunction
It seems that:
1. build_stl_str_hl()
w_p_stl is "%!MyStatusLine()".
2. eval_to_string()
Evaluate "MyStatusLine()".
3. call_func()
8021 cc = name[len];
8022 name[len] = NUL;
At this time, name == w_p_stl + 2.
Then w_p_stl is changed from "%!MyStatusLine()" to "%!MyStatusLine"
4. call_user_func()
In this function, line_breakcheck() is invoked. Then Vim processes
the GUI event loop. If there is an event which is cause of drawing,
Vim draws statusline again.
5. build_stl_str_hl()
At this time, w_p_stl is "%!MyStatusLine" by 3. call_func().
6. eval_to_string()
Evaluate "MyStatusLine"
7. get_var_tv()
Echo error "E121: Undefined variable: MyStatusLine"
8. eval0()
Echo error "E15: Invalid expression: MyStatusLine"
9. redraw_custum_statusline()
5907 if (called_emsg)
5908 set_string_option_direct((char_u *)"statusline", -1,
5909 (char_u *)"", OPT_FREE | (*wp->w_p_stl != NUL
5910 ? OPT_LOCAL : OPT_GLOBAL),
SID_ERROR);
Since error is raised, w_p_stl is freed.
(back to first statusline drawing)
10. eval0()
3924 if (!aborting())
3925 EMSG2(_(e_invexpr2), arg);
Echo error "E15: Invalid expression: ~W^Iá3~L"
At this time, arg == w_p_stl + 2.
And w_p_stl is already freed.
The following is an backtrace at 7.
Breakpoint 1, get_var_tv (name=0x8216f02 "MyStatusLine", len=12,
rettv=0xbfff961c, verbose=1) at eval.c:18349
18349 EMSG2(_(e_undefvar), name);
(gdb) bt
#0 get_var_tv (name=0x8216f02 "MyStatusLine", len=12, rettv=0xbfff961c,
verbose=1) at eval.c:18349
#1 0x08076a9b in eval7 (arg=0xbfff95b8, rettv=0xbfff961c, evaluate=1,
want_string=0) at eval.c:5027
#2 0x08076367 in eval6 (arg=0xbfff95b8, rettv=0xbfff961c, evaluate=1,
want_string=0) at eval.c:4680
#3 0x08075f5d in eval5 (arg=0xbfff95b8, rettv=0xbfff961c, evaluate=1)
at eval.c:4496
#4 0x08075507 in eval4 (arg=0xbfff95b8, rettv=0xbfff961c, evaluate=1)
at eval.c:4191
#5 0x08075375 in eval3 (arg=0xbfff95b8, rettv=0xbfff961c, evaluate=1)
at eval.c:4103
#6 0x08075217 in eval2 (arg=0xbfff95b8, rettv=0xbfff961c, evaluate=1)
at eval.c:4032
#7 0x08075068 in eval1 (arg=0xbfff95b8, rettv=0xbfff961c, evaluate=1)
at eval.c:3957
#8 0x08074fd3 in eval0 (arg=0x8216f02 "MyStatusLine", rettv=0xbfff961c,
nextcmd=0x0, evaluate=1) at eval.c:3914
#9 0x08070e15 in eval_to_string (arg=0x8216f02 "MyStatusLine", nextcmd=0x0,
convert=0) at eval.c:1296
#10 0x08070f5a in eval_to_string_safe (arg=0x8216f02 "MyStatusLine",
nextcmd=0x0, use_sandbox=0) at eval.c:1340
#11 0x080577df in build_stl_str_hl (wp=0x8216fc8, out=0xbfffa36c "\364\257U",
outlen=4096, fmt=0x8216f00 "%!MyStatusLine", use_sandbox=0, fillchar=32,
maxwidth=81, hltab=0xbfffa0c0, tabtab=0xbfff9e40) at buffer.c:3415
#12 0x0815a857 in win_redr_custom (wp=0x8216fc8, draw_ruler=0) at screen.c:6101
#13 0x0815a367 in redraw_custum_statusline (wp=0x8216fc8) at screen.c:5906
#14 0x08159ebb in win_redr_status (wp=0x8216fc8) at screen.c:5775
#15 0x081515b5 in update_screen (type=40) at screen.c:529
#16 0x0819d68e in set_shellsize (width=0, height=0, mustset=0) at term.c:3161
#17 0x0819d4c6 in shell_resized () at term.c:3040
#18 0x081b19d3 in gui_resize_shell (pixel_width=587, pixel_height=663)
at gui.c:1318
#19 0x081bf86a in form_configure_event (widget=0x833b808, event=0xbfffb8c0,
data=0x0) at gui_gtk_x11.c:4002
#20 0x00bee474 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#21 0x00269072 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
#22 0x0027e7a8 in ?? () from /usr/lib/libgobject-2.0.so.0
#23 0x0027f9b8 in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
#24 0x0027ffb6 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
#25 0x00d0a96e in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#26 0x00be807c in gtk_main_do_event () from /usr/lib/libgtk-x11-2.0.so.0
#27 0x081c4b26 in gtk_form_send_configure (form=0x833b808) at gui_gtk_f.c:905
#28 0x081c4052 in gtk_form_size_allocate (widget=0x833b808,
allocation=0xbfffbcb0) at gui_gtk_f.c:519
#29 0x00276068 in g_cclosure_marshal_VOID__BOXED ()
from /usr/lib/libgobject-2.0.so.0
#30 0x002676f9 in ?? () from /usr/lib/libgobject-2.0.so.0
#31 0x00268f98 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
#32 0x0027e0b0 in ?? () from /usr/lib/libgobject-2.0.so.0
#33 0x0027fb2d in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
#34 0x0027ffb6 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
#35 0x00d125f0 in gtk_widget_size_allocate () from /usr/lib/libgtk-x11-2.0.so.0
#36 0x00b26c7f in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#37 0x00276068 in g_cclosure_marshal_VOID__BOXED ()
from /usr/lib/libgobject-2.0.so.0
#38 0x002676f9 in ?? () from /usr/lib/libgobject-2.0.so.0
#39 0x00268f98 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
#40 0x0027e0b0 in ?? () from /usr/lib/libgobject-2.0.so.0
#41 0x0027fb2d in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
#42 0x0027ffb6 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
#43 0x00d125f0 in gtk_widget_size_allocate () from /usr/lib/libgtk-x11-2.0.so.0
#44 0x00d24deb in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#45 0x00276068 in g_cclosure_marshal_VOID__BOXED ()
from /usr/lib/libgobject-2.0.so.0
#46 0x002676f9 in ?? () from /usr/lib/libgobject-2.0.so.0
#47 0x00269072 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
#48 0x0027e0b0 in ?? () from /usr/lib/libgobject-2.0.so.0
#49 0x0027fb2d in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
#50 0x0027ffb6 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
#51 0x00d125f0 in gtk_widget_size_allocate () from /usr/lib/libgtk-x11-2.0.so.0
#52 0x00d25260 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#53 0x002769fc in g_cclosure_marshal_VOID__VOID ()
from /usr/lib/libgobject-2.0.so.0
#54 0x002676f9 in ?? () from /usr/lib/libgobject-2.0.so.0
#55 0x00269072 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
#56 0x0027e49e in ?? () from /usr/lib/libgobject-2.0.so.0
#57 0x0027fb2d in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
#58 0x0027ffb6 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
#59 0x00b5a31a in gtk_container_check_resize ()
from /usr/lib/libgtk-x11-2.0.so.0
#60 0x00b5a370 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#61 0x00125f78 in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#62 0x002d30f1 in ?? () from /lib/libglib-2.0.so.0
#63 0x002d4e78 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#64 0x002d8720 in ?? () from /lib/libglib-2.0.so.0
#65 0x002d8853 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#66 0x00be8203 in gtk_main_iteration_do () from /usr/lib/libgtk-x11-2.0.so.0
#67 0x081c217c in gui_mch_update () at gui_gtk_x11.c:6473
#68 0x081a0b4f in ui_breakcheck () at ui.c:364
#69 0x08103dc7 in line_breakcheck () at misc1.c:8423
#70 0x0808d2a1 in call_user_func (fp=0x82881a8, argcount=0, argvars=0xbfffcee8,
rettv=0xbfffd40c, firstline=1, lastline=1, selfdict=0x0) at eval.c:21096
#71 0x0807a81d in call_func (name=0x8216f02 "MyStatusLine", len=12,
rettv=0xbfffd40c, argcount=0, argvars=0xbfffcee8, firstline=1, lastline=1,
doesrange=0xbfffd078, evaluate=1, selfdict=0x0) at eval.c:8115
#72 0x0807a471 in get_func_tv (name=0x8216f02 "MyStatusLine", len=12,
rettv=0xbfffd40c, arg=0xbfffd3a8, firstline=1, lastline=1,
doesrange=0xbfffd078, evaluate=1, selfdict=0x0) at eval.c:7961
#73 0x08076a4e in eval7 (arg=0xbfffd3a8, rettv=0xbfffd40c, evaluate=1,
want_string=0) at eval.c:5013
#74 0x08076367 in eval6 (arg=0xbfffd3a8, rettv=0xbfffd40c, evaluate=1,
want_string=0) at eval.c:4680
#75 0x08075f5d in eval5 (arg=0xbfffd3a8, rettv=0xbfffd40c, evaluate=1)
at eval.c:4496
#76 0x08075507 in eval4 (arg=0xbfffd3a8, rettv=0xbfffd40c, evaluate=1)
at eval.c:4191
#77 0x08075375 in eval3 (arg=0xbfffd3a8, rettv=0xbfffd40c, evaluate=1)
at eval.c:4103
#78 0x08075217 in eval2 (arg=0xbfffd3a8, rettv=0xbfffd40c, evaluate=1)
at eval.c:4032
#79 0x08075068 in eval1 (arg=0xbfffd3a8, rettv=0xbfffd40c, evaluate=1)
at eval.c:3957
#80 0x08074fd3 in eval0 (arg=0x8216f02 "MyStatusLine", rettv=0xbfffd40c,
nextcmd=0x0, evaluate=1) at eval.c:3914
#81 0x08070e15 in eval_to_string (arg=0x8216f02 "MyStatusLine", nextcmd=0x0,
convert=0) at eval.c:1296
#82 0x08070f5a in eval_to_string_safe (arg=0x8216f02 "MyStatusLine",
nextcmd=0x0, use_sandbox=0) at eval.c:1340
#83 0x080577df in build_stl_str_hl (wp=0x8216fc8,
out=0xbfffe15c "?P\a\b\034aH\b\360\341\377\277\003", outlen=4096,
fmt=0x8216f00 "%!MyStatusLine", use_sandbox=0, fillchar=32, maxwidth=81,
hltab=0xbfffdeb0, tabtab=0xbfffdc30) at buffer.c:3415
#84 0x0815a857 in win_redr_custom (wp=0x8216fc8, draw_ruler=0) at screen.c:6101
#85 0x0815a367 in redraw_custum_statusline (wp=0x8216fc8) at screen.c:5906
#86 0x0815f96b in showruler (always=0) at screen.c:9468
#87 0x080dd6b2 in main_loop (cmdwin=0, noexmode=0) at main.c:1147
#88 0x080dd281 in main (argc=3, argv=0xbffff434) at main.c:942
--
Yukihiro Nakadaira - yukihiro.nakada...@gmail.com
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