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[WIP] avoid to_region_vid ICE during constraint conversion #58839

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[WIP] avoid to_region_vid ICE during constraint conversion #58839

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@pnkfelix pnkfelix commented Mar 1, 2019 •
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Cc #57464

pnkfelix added 2 commits March 1, 2019 13:34
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Avoid ICE by using delay_span_bug on constraint_conversion's to_regio…
9f75f51 
…n_vid calls.

(required slight revision to to_region_vid to return Result.)
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Unit tests for rust-lang#57464 ICE.
88801bf
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r? @petrochenkov

(rust_highfive has picked a reviewer for you, use r? to override)

@rust-highfive rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Mar 1, 2019
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pnkfelix commented Mar 1, 2019

r? @matthewjasper

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@bors r+

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bors commented Mar 1, 2019

📌 Commit 88801bf has been approved by matthewjasper

@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 Mar 1, 2019
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@bors r- this does not appear to fully fix the problem. See #57464 (comment)

@bors bors added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. labels Mar 2, 2019
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pnkfelix commented Mar 4, 2019

@matthewjasper That's unfortunate.

What do you think about landing this anyway? I'm removing "fix" from the description.

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pnkfelix commented Mar 4, 2019

Cc @nikomatsakis

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I'm not sure, landing a partial fix that makes the code more complicated doesn't seem like such a great idea.

@pnkfelix pnkfelix changed the title avoid to_region_vid ICE during constraint conversion [WIP] avoid to_region_vid ICE during constraint conversion Mar 11, 2019
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I'm going to close this and see if I can attack the root problem.

@pnkfelix pnkfelix closed this Mar 12, 2019
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