On 10/14/2016 3:18 AM, Nordlöw wrote:
t_scope.d(23,6): Error: variable t_scope.below.s has scoped destruction, cannot
build closure

  https://github.com/dlang/dmd/blob/master/src/toir.d#L820

The problem is the closure is generated when it is expected that the delegate will survive past the end of the scope (it's the whole point of a closure). But with a destructor that runs at the end of the scope, it cannot survive, and so the user of the closure will be referring to a destroyed object.

There is a current PR to improve the closure decision so that fewer closures are necessary,

  https://github.com/dlang/dmd/pull/5972

I don't know if that will resolve the issue you're having.

(A smaller test case would be nice!)

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