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ca5df9ab25
fixes #24338 When unrolling each iteration of a `fields` iterator, the compiler only opens a new scope for semchecking, but doesn't generate a node that signals to the codegen that a new scope should be created. This causes issues for reused template instantiations that reuse variable symbols between each iteration, which causes the codegen to generate multiple declarations for them in the same scope (regardless of `inject` or `gensym`). To fix this, we wrap the unrolled iterations in an `if true: body` node, which both opens a new scope and doesn't interfere with `break`.