This can happen when in the filetype configuration we set
```ini
[settings]
tag_parser=
```
This then leads to this crash in the ctags code:
```
#0 countKinds (kcb=0x0) at main/kind.c:230
#1 0x0000fffff7e802c8 in countLanguageKinds (language=language@entry=-2)
at main/parse.c:300
#2 0x0000fffff7e15f88 in tm_ctags_get_lang_kinds (lang=lang@entry=-2)
at tm_ctags.c:467
#3 0x0000fffff7e173e8 in read_ctags_file
(file_tags=0xaaaaaad7e260, lang=-2, tags_file=0xaaaaaaf86de0
"/usr/local/share/geany/tags/std.py.tags") at tm_source_file.c:313
#4 tm_source_file_read_tags_file
(tags_file=tags_file@entry=0xaaaaaaf86de0
"/usr/local/share/geany/tags/std.py.tags", mode=-2) at
tm_source_file.c:552
#5 0x0000fffff7e1a4dc in tm_workspace_load_global_tags
(tags_file=tags_file@entry=0xaaaaaaf86de0
"/usr/local/share/geany/tags/std.py.tags", mode=<optimized
out>) at tm_workspace.c:379
#6 0x0000fffff7c9937c in symbols_load_global_tags
(tags_file=0xaaaaaaf86de0
"/usr/local/share/geany/tags/std.py.tags",
ft=ft@entry=0xaaaaab4cdf40) at symbols.c:166
#7 0x0000fffff7c997bc in load_user_tags (ft_id=GEANY_FILETYPES_PYTHON)
at symbols.c:1377
#8 symbols_global_tags_loaded (file_type_idx=<optimized out>) at
symbols.c:193
#9 0x0000fffff7c53bdc in document_load_config
(doc=0xaaaaac1c90d0, type=0xaaaaab4cdf40, filetype_changed=<optimized
out>)
at document.c:2820
#10 0x0000fffff7c53cc8 in document_set_filetype
(doc=0xaaaaac1c90d0, type=0xaaaaab4cdf40) at document.c:2859
#11 0x0000fffff7c55ac4 in document_open_file_full (doc=<optimized out>,
doc@entry=0x0, filename=<optimized out>, pos=pos@entry=0,
readonly=readonly@entry=0, ft=ft@entry=0x0, forced_enc=forced_enc@entry=0x0) at
document.c:1490
#12 0x0000fffff7c55b00 in document_open_file
(locale_filename=<optimized out>, readonly=readonly@entry=0,
ft=ft@entry=0x0, forced_enc=forced_enc@entry=0x0) at document.c:904
```
Until there's some LSP support in Geany, setting `tag_parser` to the empty
value is necessary to disable ctags parsing so it doesn't clash with the
LSP implementation.
You can view, comment on, or merge this pull request online at:
https://github.com/geany/geany/pull/3865
-- Commit Summary --
* Protect tm_ctags_*() functions against TM_PARSER_NONE language parameter
-- File Changes --
M src/tagmanager/tm_ctags.c (29)
-- Patch Links --
https://github.com/geany/geany/pull/3865.patch
https://github.com/geany/geany/pull/3865.diff
--
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