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based on #67134

closes #66975

r? @oli-obk

@rust-highfive rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Dec 8, 2019
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oli-obk commented Dec 9, 2019

Please also add the test from the issue as a ui test showing that we error if the value is actually used.

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oli-obk commented Dec 9, 2019

Also, does your change fix

#![feature(const_panic)]
#![allow(const_err)]

const VOID: ! = panic!();

fn main() {
    let _ = VOID;
}

Or will this still compile?

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oli-obk commented Dec 10, 2019

@bors r+

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bors commented Dec 10, 2019

📌 Commit d2ed209 has been approved by oli-obk

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Dec 10, 2019
Centril added a commit to Centril/rust that referenced this pull request Dec 11, 2019
…=oli-obk

Ensure that panicking in constants eventually errors

based on rust-lang#67134

closes rust-lang#66975

r? @oli-obk
bors added a commit that referenced this pull request Dec 11, 2019
Rollup of 6 pull requests

Successful merges:

 - #66881 (Optimize Ord trait implementation for bool)
 - #67015 (Fix constant propagation for scalar pairs)
 - #67074 (Add options to --extern flag.)
 - #67164 (Ensure that panicking in constants eventually errors)
 - #67174 (Remove `checked_add` in `Layout::repeat`)
 - #67205 (Make `publish_toolstate.sh` executable)

Failed merges:

r? @ghost
@bors bors merged commit d2ed209 into rust-lang:master Dec 11, 2019
@matthewjasper matthewjasper deleted the never-remove-const branch December 15, 2019 16:24
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Successfully merging this pull request may close these issues.

Program that uses the const VOID: ! =panic!() associated constant compiles and runs into illegal intruction.
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