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internal/packing: bug fix: node's links were not synced correctly

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Closes #2584
This commit is contained in:
Hajime Hoshi 2023-02-28 17:06:51 +09:00
parent 5e4652c4f8
commit 6b957063d4
2 changed files with 26 additions and 2 deletions
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8
internal/packing/packing.go
View File

@ -318,7 +318,8 @@ func (p *Page) extend(newWidth int, newHeight int) func() {
var rollback func()
if aborted {
origRoot := *p.root
origRoot := p.root
origRootCloned := *p.root
// Extend the page in the vertical direction.
if newHeight-p.height > 0 {
@ -366,7 +367,10 @@ func (p *Page) extend(newWidth int, newHeight int) func() {
rollback = func() {
p.width = origWidth
p.height = origHeight
p.root = &origRoot
// The node address must not be changed, so use the original root node's pointer (#2584).
// As the root node might be modified, recover the content from the cloned content.
p.root = origRoot
*p.root = origRootCloned
}
} else {
origWidth, origHeight := p.width, p.height

20
internal/packing/packing_test.go
View File

@ -431,3 +431,23 @@ func TestExtend3(t *testing.T) {
p.Free(n1)
p.Free(n2)
}
// Issue #2584
func TestRemoveAtRootsChild(t *testing.T) {
p := packing.NewPage(32, 32, 1024)
n0 := p.Alloc(18, 18)
n1 := p.Alloc(28, 59)
n2 := p.Alloc(18, 18)
n3 := p.Alloc(18, 18)
n4 := p.Alloc(8, 10)
n5 := p.Alloc(322, 242)
_ = n5
p.Free(n0)
p.Free(n2)
p.Free(n1)
p.Free(n3)
p.Free(n4)
n6 := p.Alloc(18, 18)
p.Free(n6)
}