Cyclic dependencies in constants cause stack overflow #40

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opened 2026-06-12 13:42:58 +00:00 by Furkan · 1 comment

Furkan commented

2026-06-12 13:42:58 +00:00

Expected behaviour: detect cycles and report error

Code to reproduce

const {
	x = z - 8
	y = x + 2
	z = y * 3
}

main() {
	assert x == 1
	assert y == 3
	assert z == 9
}

Expected behaviour: detect cycles and report error Code to reproduce ``` const { x = z - 8 y = x + 2 z = y * 3 } main() { assert x == 1 assert y == 3 assert z == 9 } ```

👍 1

ed added the

bug

label

2026-06-12 13:54:56 +00:00

ed self-assigned this

2026-06-12 13:55:34 +00:00

ed commented

2026-06-12 15:49:15 +00:00

Owner

Fixed in 32c308910d.
Ideally this detection would work for constant definitions even without triggering lazy evaluation.
But for now this is good enough. The cycle is detected during lazy evaluation only.

Fixed in https://git.urbach.dev/cli/q/commit/32c308910de1663fab593d645b1abcfab6199ca1. Ideally this detection would work for constant definitions even without triggering lazy evaluation. But for now this is good enough. The cycle is detected during lazy evaluation only.

ed added spent time

2026-06-12 15:53:00 +00:00

30 minutes

Furkan closed this issue

2026-06-13 09:37:23 +00:00