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bug#60127: treesit-end-of-defun: possible bug with clojure grammar


From: Dmitry Gutov
Subject: bug#60127: treesit-end-of-defun: possible bug with clojure grammar
Date: Mon, 16 Jan 2023 03:56:10 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.4.2

On 22/12/2022 10:55, Yuan Fu wrote:
Danny Freeman<danny@dfreeman.email>  writes:

Yuan,

Thank you very much for this detailed report! This seems to be some
problem with either tree-sitter or tree-sitter-clojure, where
treesit-node-first-child-for-pos gives wrong result. We’ve had similar
problem with bash before[1].

At this point there aren’t much we can do in Emacs. If I find some time
I’ll make a reproduce recipe and submit an issue on tree-sitter-clojure.

[1]https://github.com/tree-sitter/tree-sitter-bash/issues/139

Yuan
I have a c program that I believe reproduces the problem. I'm not sure
how we will go about fixing it in tree-sitter-clojure, but at least we
have a minimal way to re-create it.

Here is a link to the issue I created:
https://github.com/sogaiu/tree-sitter-clojure/issues/32
that also includes the c-program. I've also put it on my source hut
https://paste.sr.ht/~dannyfreeman/8786059276c334036877159a5b0872cd2aa6fbc0
If you find the time, I would appreciate it if you could confirm my
findings. I'm a little in over my head with this bug I'm afraid.
I think it’s pretty good (the reproduce), the author’s modified program
is even better. Let’s wait and see what tree-sitter’s author have to
say.

Just to keep everyone of the same page:

clojure-tree-sitter's author posted an issue to tree-sitter last week: https://github.com/tree-sitter/tree-sitter/issues/2012

and, previously, he also suggested we might be able to work around it using treesit_search_dfs: https://github.com/sogaiu/tree-sitter-clojure/issues/32#issuecomment-1364830835





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