Malte Ubl e520c9f3b6 Buffer only union boxes whose trace can reach a cycle ...

scr_union_release buffered every union box left alive by a release as a
cycle-collector candidate, including boxes whose arm_trace is NULL (scalar
arms, and ref arms whose type the compiler proved acyclic, such as
TreeNode | null once TreeNode is constructor-only). Such a box's trace visits
nothing, so it can never be on a collectable cycle: skip the candidate
buffer for it. Deaths check the header's buffered bit inline before calling
scr_cyc_on_dead, because typed-ref cache commits swap arm contents between
boxes of one union type, so a box can have been buffered under an earlier
arm.

test_closure.c checks that string- and f64-armed boxes are never buffered,
that closure-armed boxes are, and that a closure -> box -> union -> closure
cycle is still collected under the RC audit.

2026-10-08 15:26:31 -05:00

..

src

Buffer only union boxes whose trace can reach a cycle

2026-10-08 15:26:31 -05:00

test

Buffer only union boxes whose trace can reach a cycle

2026-10-08 15:26:31 -05:00

vendor

…

LICENSE

…

package.json

…