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fix #15941 (#15948)

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* fix #15941

* add testcase

* update
This commit is contained in:
flywind 2020-11-13 15:11:00 +08:00 • committed by GitHub
commit 492e9afa4c
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2 changed files with 24 additions and 4 deletions
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11
lib/pure/collections/sharedlist.nim
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@ -65,11 +65,14 @@ iterator items*[A](x: var SharedList[A]): A =
proc add*[A](x: var SharedList[A]; y: A) =
withLock(x):
var node: SharedListNode[A]
if x.tail == nil or x.tail.dataLen == ElemsPerNode:
node = cast[type node](allocShared0(sizeof(node[])))
node.next = x.tail
if x.tail == nil:
node = cast[typeof node](allocShared0(sizeof(node[])))
x.tail = node
x.head = node
elif x.tail.dataLen == ElemsPerNode:
node = cast[typeof node](allocShared0(sizeof(node[])))
x.tail.next = node
x.tail = node
if x.head == nil: x.head = node
else:
node = x.tail
node.d[node.dataLen] = y