Merge pull request #5110 from yglukhov/leaks

More workarounds for #5098

lib/pure/collections/deques.nim

@@ -160,7 +160,10 @@ proc peekLast*[T](deq: Deque[T]): T {.inline.} =
   emptyCheck(deq)
   result = deq.data[(deq.tail - 1) and deq.mask]
 
-proc default[T](t: typedesc[T]): T {.inline.} = discard
+template default[T](t: typedesc[T]): T =
+  var v: T
+  v
+
 proc popFirst*[T](deq: var Deque[T]): T {.inline, discardable.} =
   ## Remove and returns the first element of the `deq`.
   emptyCheck(deq)

lib/pure/collections/queues.nim

@@ -154,7 +154,10 @@ proc add*[T](q: var Queue[T], item: T) =
   q.data[q.wr] = item
   q.wr = (q.wr + 1) and q.mask
 
-proc default[T](t: typedesc[T]): T {.inline.} = discard
+template default[T](t: typedesc[T]): T =
+  var v: T
+  v
+
 proc pop*[T](q: var Queue[T]): T {.inline, discardable.} =
   ## Remove and returns the first (oldest) element of the queue `q`.
   emptyCheck(q)

lib/pure/collections/sets.nim

@@ -261,7 +261,9 @@ template doWhile(a, b) =
     b
     if not a: break
 
-proc default[T](t: typedesc[T]): T {.inline.} = discard
+template default[T](t: typedesc[T]): T =
+  var v: T
+  v
 
 proc excl*[A](s: var HashSet[A], key: A) =
   ## Excludes `key` from the set `s`.