}

	copystack(gp, newsize)
}

// freeStackSpans frees unused stack spans at the end of GC.
func freeStackSpans() {
	// Scan stack pools for empty stack spans.
	for order := range stackpool {
		lock(&stackpool[order].item.mu)
		list := &stackpool[order].item.span
		for s := list.first; s != nil; {
			next := s.next
			if s.allocCount == 0 {
				list.remove(s)

// Inferno utils/6l/span.c
// https://bitbucket.org/inferno-os/inferno-os/src/master/utils/6l/span.c
//
//	Copyright © 1994-1999 Lucent Technologies Inc.  All rights reserved.
//	Portions Copyright © 1995-1997 C H Forsyth (******@****.***)
//	Portions Copyright © 1997-1999 Vita Nuova Limited
//	Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
//	Portions Copyright © 2004,2006 Bruce Ellis

      if (rangeMap.asMapOfRanges().isEmpty()) {
        return;
      }
      Range<K> span = rangeMap.span();
      checkArgument(
          subRange.encloses(span),
          "Cannot putAll rangeMap with span %s into a subRangeMap(%s)",
          span,
          subRange);
      TreeRangeMap.this.putAll(rangeMap);
    }

    @Override
    public void clear() {

.dead-block.highlight-skyblue,
.dead-value span.highlight-lightgray,
.dead-block.highlight-lightgray,
.dead-value span.highlight-yellow,
.dead-block.highlight-yellow,
.dead-value span.highlight-lime,
.dead-block.highlight-lime,
.dead-value span.highlight-khaki,
.dead-block.highlight-khaki,
.dead-value span.highlight-aqua,
.dead-block.highlight-aqua,
.dead-value span.highlight-salmon,
.dead-block.highlight-salmon {

            event.spans.size() == 1 && event.spans[0].text == toNative('task2\n')
        })
        1 * target.onOutput({ StyledTextOutputEvent event ->
            event.spans.size() == 3 &&
                event.spans[0].text == toNative('task1 ') &&
                event.spans[1].text == toNative('task1-done') &&
                event.spans[2].text == toNative('\n')
        })

        then:
        1 * listener.onOutput(!null) >> { args ->
            def event = args[0]
            assert event.spans.size() == 2
            assert event.spans[0].style == Header
            assert event.spans[0].text == 'header'
            assert event.spans[1].style == Normal
            assert event.spans[1].text == toNative('normal\n')
        }
        0 * listener._
    }

    def ignoresEmptySpans() {

      if (rangeMap.asMapOfRanges().isEmpty()) {
        return;
      }
      Range<K> span = rangeMap.span();
      checkArgument(
          subRange.encloses(span),
          "Cannot putAll rangeMap with span %s into a subRangeMap(%s)",
          span,
          subRange);
      TreeRangeMap.this.putAll(rangeMap);
    }

    @Override
    public void clear() {

		rzSize := computeRZlog(span.elemsize)
		span.elemsize -= rzSize
		span.largeType.Size_ = span.elemsize
		rzStart := span.base() + span.elemsize
		span.userArenaChunkFree = makeAddrRange(span.base(), rzStart)
		asanpoison(unsafe.Pointer(rzStart), span.limit-rzStart)
		asanunpoison(unsafe.Pointer(span.base()), span.elemsize)
	}

	if rate := MemProfileRate; rate > 0 {
		c := getMCache(mp)
		if c == nil {

 │                          │
 │  <span style="background-color:#272822"><font color="#FF4689">from</font></span><span style="background-color:#272822"><font color="#F8F8F2"> main </font></span><span style="background-color:#272822"><font color="#FF4689">import</font></span><span style="background-color:#272822"><font color="#F8F8F2"> app</font></span><span style="background-color:#272822">  </span>  │
 │                          │

          {{/* source line */ -}}
          <span class=line>{{printf " %6d" .Line}}</span>{{" " -}}
          <span class={{.HTMLClass}}>
            {{- printf "  %10s %10s %8s  %s " .Flat .Cumulative "" .SrcLine -}}
          </span>{{"" -}}

          {{if .Instructions -}}
            {{/* instructions for this source line */ -}}
            <span class=asm>{{"" -}}
            {{range .Instructions -}}