outroing transition group never unmounts if one sibling remounts with delay in bidirectional transition

[pushkine]

https://svelte.dev/repl/7157234039fa43c2ac779c534941e263?version=3.23.0

svelte/src/runtime/internal/transitions.ts

Lines 309 to 320 in 8fc85f0

	if (!pending_program) {
	// we're done
	if (running_program.b) {
	// intro — we can tidy up immediately
	clear_animation();
	} else {
	// outro — needs to be coordinated
	if (!--running_program.group.r) run_all(running_program.group.c);
	}
	}
	running_program = null;

pending_program is only present in bidirectional transitions with delay

reversing one while it's outroing will fail the !pending_program check, and discard running_program

the group running_program belongs to subsequently cannot complete its transition

[Conduitry]

This should be fixed now in 3.29.0.

[pushkine]

it's not, the REPL is expected to outro b after clicking the button

[orange4glace]

As I've seen this issue again, #5353 is not related with this issue. My apology.

#5353 fixes child component with delayed bidirectional transition prevents its parent component being unmounted.
This issue describes that parent component which has child component with delayed transition prevents its child component being unmounted.

#5353 should be stay what it was since it actually fixes the existing bug which is described in #5353,
and this issue should be reopened since #5353 does not fixes the bug described in here.