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clojurescript 2025-04-30
woody992 2025-04-30T08:41:06.950509Z
Hi, I've got an issue with the latest release of clojurescript 1.12.35 in a shadow-cljs 3.0.3 build. The issue seems to be around laziness where if I filter a lazy seq that results in filtering out all the elements if the lazy seq is too large it results in a Maximum call stack size exceeded error. The following code shows the issue
(let [things (zipmap (range 15000) (repeat 0))]
(count (filter #(-> % key string?) things)))filter is non lazy by using filterv the issue doesn't happen. Also, if the filter results in a non empty collection the issue doesn't happen.
Does this seem like a bug?
p-himik 2025-04-30T08:45:26.884409Z
A tiny correction - "filter a lazy seq" sounds like the things collection is lazy, but it is not - it's a regular map.
But yeah, it does seem like a bug.
scarytom 2025-04-30T08:46:26.827989Z
yes, we were looking at that commit @thheller (I work with @stuart055)
thheller 2025-04-30T08:47:02.845649Z
don't see how anything in shadow-cljs would affect this, so thats my only real guess looking at the cljs commit history
woody992 2025-04-30T09:11:50.597389Z
Thank you for the help so far, is there somewhere more official I should be raising this, or is here enough?
p-himik 2025-04-30T09:21:03.728679Z
I posted it in #cljs-dev. Feel free to pop by and add any useful details.
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