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Title: Bugfix/mpc parse segfault by Memnoc · Pull Request #177 · orangeduck/mpc · GitHub

Open Graph Title: Bugfix/mpc parse segfault by Memnoc · Pull Request #177 · orangeduck/mpc

X Title: Bugfix/mpc parse segfault by Memnoc · Pull Request #177 · orangeduck/mpc

Description: A Parser Combinator library for C. Contribute to orangeduck/mpc development by creating an account on GitHub.

Open Graph Description: Hey Daniel, Sorry about the long PR, this fix took me places 🛝 I have started with a much more naive fix that worked in my follow along repo, but that did not work for main, so here we are 😄 What I...

X Description: Hey Daniel, Sorry about the long PR, this fix took me places 🛝 I have started with a much more naive fix that worked in my follow along repo, but that did not work for main, so here we are 😄 What I...

Opengraph URL: https://github.com/orangeduck/mpc/pull/177

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og:image:altHey Daniel, Sorry about the long PR, this fix took me places 🛝 I have started with a much more naive fix that worked in my follow along repo, but that did not work for main, so here we are 😄 What I...
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Jan 9, 2026https://github.com/orangeduck/mpc/pull/177#issue-3796112258
Fixes #184https://github.com/orangeduck/BuildYourOwnLisp/issues/184
Please reload this pagehttps://github.com/orangeduck/mpc/pull/177
Memnochttps://github.com/Memnoc
December 31, 2025 18:01https://github.com/orangeduck/mpc/pull/177#commits-pushed-ade1e67
https://github.com/Memnoc
Add NULL sentinel macro and tracking fields for parser lookuphttps://github.com/orangeduck/mpc/pull/177/commits/ade1e674742c1272fc9c4e2c3213d4555718aaf9
ade1e67https://github.com/orangeduck/mpc/pull/177/commits/ade1e674742c1272fc9c4e2c3213d4555718aaf9
https://github.com/Memnoc
Fix segfault in mpca_grammar_find_parserhttps://github.com/orangeduck/mpc/pull/177/commits/c4ce02a2cdc16b6df2dedc5e88e234d084ef1215
c4ce02ahttps://github.com/orangeduck/mpc/pull/177/commits/c4ce02a2cdc16b6df2dedc5e88e234d084ef1215
https://github.com/Memnoc
Initialize tracking fields and surface errors in mpca_lang functionshttps://github.com/orangeduck/mpc/pull/177/commits/645952f52b497e5dd08978e455b00dd8c4cd3cec
645952fhttps://github.com/orangeduck/mpc/pull/177/commits/645952f52b497e5dd08978e455b00dd8c4cd3cec
https://github.com/Memnoc
Update test_missingrule for fail-fast behaviorhttps://github.com/orangeduck/mpc/pull/177/commits/8e90f316c50f1cb5621f091eaeabaeacdf1ea0af
8e90f31https://github.com/orangeduck/mpc/pull/177/commits/8e90f316c50f1cb5621f091eaeabaeacdf1ea0af
https://github.com/Memnoc
Add test for issue #184: parser name mismatch detectionhttps://github.com/orangeduck/mpc/pull/177/commits/9d4f786d2b213e051b83694dad6b207dd45e60ca
9d4f786https://github.com/orangeduck/mpc/pull/177/commits/9d4f786d2b213e051b83694dad6b207dd45e60ca
https://github.com/Memnoc
Added comments and technical explanations for mpca_grammar_find_parserhttps://github.com/orangeduck/mpc/pull/177/commits/81d3bc2bc74b43eaf705da5ac76953bb6fcc98f7
81d3bc2https://github.com/orangeduck/mpc/pull/177/commits/81d3bc2bc74b43eaf705da5ac76953bb6fcc98f7
https://github.com/Memnoc
added comment explaining why I am using two types of error messagehttps://github.com/orangeduck/mpc/pull/177/commits/da6bd86d5cd61b85ee5a067750bbbf64192e25da
da6bd86https://github.com/orangeduck/mpc/pull/177/commits/da6bd86d5cd61b85ee5a067750bbbf64192e25da
https://github.com/Memnoc
better docs for mpca_lang_internalhttps://github.com/orangeduck/mpc/pull/177/commits/bbdaa1a5c88f30746f875fa1070d45a47b96622d
bbdaa1ahttps://github.com/orangeduck/mpc/pull/177/commits/bbdaa1a5c88f30746f875fa1070d45a47b96622d
https://github.com/Memnoc
better comments, placement and indentation: mpca_lang_internal, mpca_…https://github.com/orangeduck/mpc/pull/177/commits/3f53c36260c81337d9d839d8e7c2cfc761afec7c
3f53c36https://github.com/orangeduck/mpc/pull/177/commits/3f53c36260c81337d9d839d8e7c2cfc761afec7c
https://github.com/Memnoc
better docs and docs clean up on grammar.chttps://github.com/orangeduck/mpc/pull/177/commits/a082b0b497666bcf7218a2b9a96cffb25a0903c6
a082b0bhttps://github.com/orangeduck/mpc/pull/177/commits/a082b0b497666bcf7218a2b9a96cffb25a0903c6
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docs for test.chttps://github.com/orangeduck/mpc/pull/177/commits/395c9a39a44a1e0ce4d31133d140cd6ff6dac5f8
395c9a3https://github.com/orangeduck/mpc/pull/177/commits/395c9a39a44a1e0ce4d31133d140cd6ff6dac5f8
https://github.com/Memnoc
issue_184.c docs and docs clean uphttps://github.com/orangeduck/mpc/pull/177/commits/3ff2c259db57bae68fd2871384f2ea58cc3994af
3ff2c25https://github.com/orangeduck/mpc/pull/177/commits/3ff2c259db57bae68fd2871384f2ea58cc3994af
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Jan 10, 2026https://github.com/orangeduck/mpc/pull/177#issuecomment-3733548613
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Please reload this pagehttps://github.com/orangeduck/mpc/pull/177
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Jan 11, 2026https://github.com/orangeduck/mpc/pull/177#issuecomment-3735163256
Please reload this pagehttps://github.com/orangeduck/mpc/pull/177
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Jan 20, 2026 https://github.com/orangeduck/mpc/pull/177#ref-issue-3765643999
Better error handling on potential name mismatch orangeduck/BuildYourOwnLisp#184 https://github.com/orangeduck/BuildYourOwnLisp/issues/184
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