init tests/database_callbacks.exe

_c1 = database_callbacks:VariableTarget
_c2 = _c1 + 4

commentset _c1, old1
commentset _c2, old2
dbreset

dbreentrantcommentset _c1, reentrant
commentclear

// Both removals must reach every plugin before the reentrant add.
assertopsize 3
assertlastop mod.hash(mod.base(_c1)), (_c1-mod.base(_c1)), c, a, 0, reentrant
