info: infinite(?) loop with LC_ALL=C

[Hilmar Preuße]

Hi,

another issue for TeXinfo 7.0. This is texinfo 7.0 +

fc756d9128170d92cfacb367e2622c991b1ea5c7
b13b687f6358af61b9fe3a04f50f7824ba38ccef
40ec4f80ba9875cb801390bf7a2fed4371c6c4dc

I'm able to reproduce on Debian unstable, texinfo 7.0 is in experimental.

Hilmar

--- original report ---

This seems to hang forever:

  $ LC_ALL=C info python3.10 -n 'Other Language Changes<3>'

Backtrace:

  #0  0xf7c23be5 in iconv (cd=0x578d17a0, inbuf=0x56661668 <inptr>,
inbytesleft=0xff9565b8, outbuf=0xff956548, outbytesleft=0xff956544) at
./iconv/iconv.c:32
  #1  0x56644a19 in text_buffer_iconv (buf=0x56661614 <output_buf>,
iconv_state=0x578d17a0, inbuf=0x56661668 <inptr>,
inbytesleft=0xff9565b8)at ./info/util.c:357
  #2  0x56634757 in copy_converting (n=373) at ./info/scan.c:702
  #3  copy_input_to_output (n=n@entry=373) at ./info/scan.c:870
  #4  0x566358eb in copy_input_to_output (n=373) at ./info/scan.c:1554
  #5  scan_node_contents (node=0x578d16b0, fb=0x5726cc20,
tag_ptr=0xf7ee512c) at ./info/scan.c:1554
  #6  0x56633e01 in info_node_of_tag_ext (fb=fb@entry=0x5726cc20,
tag_ptr=<optimized out>, fast=fast@entry=0) at ./info/nodes.c:1289
  #7  0x56634137 in info_node_of_tag (tag_ptr=<optimized out>,
fb=0x5726cc20) at ./info/nodes.c:1329
  #8  0x566342c1 in info_get_node_with_defaults (filename_in=0x5726c7b0
"/usr/share/info/python3.10.info.gz", nodename_in=0x578cc420 "Other
Language Changes<3>", defaults=0x0) at ./info/nodes.c:996
  #9  0x5663c836 in info_select_reference (window=0x578cd590,
entry=0x578cc400) at ./info/session.c:2066
  #10 0x5664163e in begin_multiple_window_info_session
(error=<optimizedout>, references=<optimized out>) at ./info/session.c:126
  #11 info_session (ref_list=0x5728f290, user_filename=0x0, error=0x0)
at ./info/session.c:214
  #12 0x56624c91 in main (argc=<optimized out>, argv=<optimized out>)
at ./info/info.c:1082

Worse, when I change the terminal size while it's running, it segfaults.
Backtrace:

  #0  0x5661ca96 in window_make_modeline
(window=window@entry=0x582a0b30) at ./info/window.c:904
  #1  0x5661d16f in window_make_modeline (window=0x582a0b30) at
./info/window.c:862
  #2  0x565ff1a9 in display_update_one_window (win=0x582a0b30) at
./info/display.c:678
  #3  0x565ff2cb in display_update_display () at ./info/display.c:86
  #4  0x566188f1 in redisplay_after_signal () at ./info/signals.c:138
  #5  0x56618b25 in reset_info_window_sizes () at ./info/signals.c:149
  #6  info_signal_proc (sig=28) at ./info/signals.c:289
  #7  <signal handler called>
  #8  __gconv (cd=0x582a50c0, inbuf=0x56638668 <inptr>,
inbufend=0xf5c8676e "*note reversed(): 242.  (Contributed by Rémi
Lapeyre in\n    bpo-33462(6).)\n\n   * The syntax allowed for keyword
names in function calls was further\n     restricted.  In particular,
‘f((keyword)=ar"..., outbuf=0xfffa4b28, outbufend=0x582b024d"",
irreversible=0xfffa4ac8) at ./iconv/gconv.c:86
  #9  0xf7c23c5e in iconv (cd=0x582a50c0, inbuf=0x56638668 <inptr>,
inbytesleft=0xfffa4b98, outbuf=0xfffa4b28, outbytesleft=0xfffa4b24) at
./iconv/iconv.c:51
  #10 0x5661ba19 in text_buffer_iconv (buf=0x56638614 <output_buf>,
iconv_state=0x582a50c0, inbuf=0x56638668 <inptr>,
inbytesleft=0xfffa4b98)at ./info/util.c:357
  #11 0x5660b757 in copy_converting (n=373) at ./info/scan.c:702
  #12 copy_input_to_output (n=n@entry=373) at ./info/scan.c:870
  #13 0x5660c8eb in copy_input_to_output (n=373) at ./info/scan.c:1554
  #14 scan_node_contents (node=0x582a4fe0, fb=0x57c634a0,
tag_ptr=0xf7bbf12c) at ./info/scan.c:1554
  #15 0x5660ae01 in info_node_of_tag_ext (fb=fb@entry=0x57c634a0,
tag_ptr=<optimized out>, fast=fast@entry=0) at ./info/nodes.c:1289
  #16 0x5660b137 in info_node_of_tag (tag_ptr=<optimized out>,
fb=0x57c634a0) at ./info/nodes.c:1329
  #17 0x5660b2c1 in info_get_node_with_defaults (filename_in=0x57c4fff0
"/usr/share/info/python3.10.info.gz", nodename_in=0x582a05c0 "Other
Language Changes<3>", defaults=0x0) at ./info/nodes.c:996
  #18 0x56613836 in info_select_reference (window=0x582a0b30,
entry=0x582a05a0) at ./info/session.c:2066
  #19 0x5661863e in begin_multiple_window_info_session
(error=<optimizedout>, references=<optimized out>) at ./info/session.c:126
  #20 info_session (ref_list=0x57c63390, user_filename=0x0, error=0x0)
at ./info/session.c:214
  #21 0x565fbc91 in main (argc=<optimized out>, argv=<optimized out>)
at ./info/info.c:1082


-- System Information:
Architecture: i386

Versions of packages info depends on:
ii  libc6         2.36-5
ii  libtinfo6     6.3+20220423-2
ii  install-info  6.8-6+b1

--