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-rw-r--r--src/runtime/mgcsweep.go1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/runtime/mgcsweep.go b/src/runtime/mgcsweep.go
index 0d58f8e0b5..2aa670e1b8 100644
--- a/src/runtime/mgcsweep.go
+++ b/src/runtime/mgcsweep.go
@@ -623,6 +623,7 @@ func (sl *sweepLocked) sweep(preserve bool) bool {
s.allocCount = nalloc
s.freeindex = 0 // reset allocation index to start of span.
+ s.freeIndexForScan = 0
if trace.enabled {
getg().m.p.ptr().traceReclaimed += uintptr(nfreed) * s.elemsize
}