dont create unnecessary `DefId`s under mgca Fixes rust-lang/rust#149977 Fixes rust-lang/rust#148838 Accidentally left this out of rust-lang/rust#149136 even though being able to do this was a large part of the point of the PR :3 First ICE was caused by the fact that we create a defid but never lower the nodeid associated with it to a hirid which later parts of the compiler can't handle. See test for second ICE r? oli-obk |
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