Avoid crashes on missing positions #19250
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All positions should be set on these trees and symbols at this point. If one is missing it is due to a compiler bug. We default the position to 0 if there is a missing position to avoid crashing when calling methods on Position. To make it possible for us to fix these missing positions, we warn if there is a missing position when compiling with -Xcheck-macros.
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Backports #19250 to the LTS branch. PR submitted by the release tooling. [skip ci]
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All positions should be set on these trees and symbols at this point. If one is missing it is due to a compiler bug. We default the position to 0 if there is a missing position to avoid crashing when calling methods on Position. To make it possible for us to fix these missing positions, we warn if there is a missing position when compiling with -Xcheck-macros.