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Auto merge of #108112 - nnethercote:clarify-iterator-interners, r=oli-obk,compiler-errors

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Clarify iterator interners

I found the iterator interners very confusing. This PR clarifies things.

r? `@compiler-errors`
This commit is contained in:
bors 2023-02-18 00:20:52 +00:00
commit a9842c73bc
36 changed files with 173 additions and 186 deletions
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2
compiler/rustc_mir_transform/src/shim.rs
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@ -597,7 +597,7 @@ fn build_call_shim<'tcx>(
let untuple_args = sig.inputs();
// Create substitutions for the `Self` and `Args` generic parameters of the shim body.
let arg_tup = tcx.mk_tup(untuple_args.iter());
let arg_tup = tcx.intern_tup(untuple_args);
(Some([ty.into(), arg_tup.into()]), Some(untuple_args))
} else {