capnp: Calculate ssa next allocation based on cap

Fixes capnproto#123
thsnr · Oct 4, 2018 · 031395d · 031395d
1 parent 6e2d12f
commit 031395d
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/mem.go b/mem.go
@@ -360,7 +360,7 @@ func (ssa *singleSegmentArena) Allocate(sz Size, segs map[SegmentID]*Segment) (S
  if hasCapacity(data, sz) {
  return 0, data, nil
  }
- inc, err := nextAlloc(int64(len(data)), int64(maxSegmentSize()), sz)
+ inc, err := nextAlloc(int64(cap(data)), int64(maxSegmentSize()), sz)
  if err != nil {
  return 0, nil, fmt.Errorf("capnp: alloc %d bytes: %v", sz, err)
  }