Anthony Bullard (Dec 03 2024 at 22:19): Anthony Bullard (Dec 03 2024 at 22:19):Bringing light to this here for more visibility: 7302
Also discussed here on Zulip.
Anthony Bullard (Dec 03 2024 at 22:20):TL;DR: I have a when expression with about 20 clauses, 7 of which have guards. I get an unwork-aroundable compiler crash during mono IR unless I remove one of two guards (The same set of guards are used in the same order, but don't cause an issue).
Anthony Bullard (Dec 03 2024 at 22:21):All this because I wanted to see if avoiding Strings would make my AOC solution faster!
Luke Boswell (Dec 03 2024 at 22:30):Thank you for digging into and reporting this.
Anthony Bullard (Dec 04 2024 at 03:20):No worries, I found a fix, and it's not pleasant and I think harmed the perf of the solution. But I updated the issue with good information on what allowed me to work around it
Anthony Bullard (Dec 04 2024 at 03:23):I'd love to know if any function inlining happens in guards, because if not I'd try moving the guard logic back out of functions
Anthony Bullard (Dec 04 2024 at 03:25):My last hope without getting _clever_ would be to try recursively inspecting a List U8 and building up the list of ops that way, and hope the compiler will emit a loop instead
Last updated: Jul 26 2025 at 12:14 UTC