bug#45056: 28.0.50; lexical-let doesn't work with returned closures on nativecomp

[Mark A. Hershberger]

> have you checked if this behavior is common to the non native build?

I was using the non-native build when I wrote the code and it worked without a 
problem.  It was only after switching to native builds that the problem 
occurred.

I can compile a non-native build and verify that the problem goes away.  I'll 
report back when it is done.