Allow adjusting the recursion limit and stop masking overflows #19466
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You can shrink this tower a bit with if let.
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@sfackler done |
…prove error reporting to suggest to user how to fix.
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I'm surprised this went in without more visibility since it's a source-level interface that has to be specced and maintained. It's also tied to compiler implementation details. |
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See #19466 for background. r? @steveklabnik
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This is particularly important for deeply nested types, which generate deeply nested impls. This is a fix for #19318. It's possible we could also improve this particular case not to increment the recursion count, but it's worth being able to adjust the recursion limit anyhow.
cc @jdm
r? @pcwalton