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kotlinlang

I'm running into an issue when I try to generate (via IR) a suspend lambda.  It fails validation because of duplicated nodes.  It seems like during lowering, the body of the lambda is copied into the continuation class's `invokeSuspend`, but the original isn't deleted.  Gists of the ir dump <https://gist.github.com/rnett/d0420f5f10c4dca3dcdd6d3d82a33f52#file-pre-lowering-L148|before lowering> and <https://gist.github.com/rnett/bdbea1755aa87bb56c2cc67b316317e5#file-post-lowering-L189|after lowering (when the error happens>).  Note in the after lowering the original lambda's body on line 192, and the body in the continuation on line 210.

Huh, apparently I didn't make the lambda functions `local` visibility, and doing so fixed this.