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Assert collection is enabled when GC starts #279

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Oct 21, 2025
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Assert collection is enabled when GC starts #279

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2 changes: 2 additions & 0 deletions mmtk/src/collection.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -59,6 +59,8 @@ impl Collection<JuliaVM> for VMCollection {
// FIXME add wait var
}

assert!(Self::is_collection_enabled(), "Collection is disabled when threads are stopped for a GC. This is a concurrency bug, see https://github.com/mmtk/mmtk-julia/issues/278.");

trace!("Stopped the world!");
#[cfg(feature = "heap_dump")]
dump_heap(GC_COUNT.load(Ordering::SeqCst), 0);
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