checker: fix the issue that a region does not merge to the sibling with smaller size (#1723) #1726
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cherry-pick #1723 to release-3.0
Signed-off-by: disksing i@disksing.com
What problem does this PR solve?
The
target
argument passed tocheckTarget
is alwaysnil
, sonext
andprev
are never compared.What is changed and how it works?
Make it right and clear and add test.
Check List
Tests
Related changes