librustc: Add an intrinsic to retrieve the return pointer of a function. #16248
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This is needed for some GC stuff in Servo.
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Pulled in as part of #16081. |
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Remove the return_address intrinsic. This intrinsic to get the return pointer was introduced in #16248 / #16081 by @pcwalton for Servo. However, as explained in #34227, it's impossible to ensure it's used correctly, and it broke with `-Zorbit`. Servo's usage is being replaced in servo/servo#11872, and I expect nobody else to have abused it. But I've also started a crater run, just in case this is a `[breaking-change]` for anyone else.
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internal: Add proc-macro-test crate back to the main workspace Should fix rust-lang/rust-analyzer#16194
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This is needed for some GC stuff in Servo.
r? @alexcrichton