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Panic when using mem::uninitialized or mem::zeroed on an uninhabited type #54667

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Merged
merged 11 commits into from
Oct 1, 2018
Merged

Panic when using mem::uninitialized or mem::zeroed on an uninhabited type #54667

merged 11 commits into from
Oct 1, 2018

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RalfJung
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All code by @japaric. This re-submits one half of #53508. This is likely not the one that introduced the perf regression, but just to be sure I'll do a perf run anyway.

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r? @cramertj

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@rust-highfive rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Sep 29, 2018
@RalfJung RalfJung mentioned this pull request Sep 29, 2018
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@bors try

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bors commented Sep 29, 2018

⌛ Trying commit a1a74ab5ad7fae002fe65b388a19be7275536871 with merge cd661db2bccbe284334ee486254891e2858a667a...

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bors commented Sep 29, 2018

💔 Test failed - status-travis

@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-review Status: Awaiting review from the assignee but also interested parties. labels Sep 29, 2018
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It got cancelled by another try build. Try again.

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@bors retry

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bors commented Sep 29, 2018

⌛ Trying commit a1a74ab5ad7fae002fe65b388a19be7275536871 with merge 31ec4bcad01a3a5f6214474912ec7f53478414d7...

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Dang, it's that gdb test again. :/ @japaric any idea?

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Oh I see. I put all commits related to that test into the other PR because I though it was only about the changed data structures. But it is also about this panic.

@RalfJung RalfJung added the S-waiting-on-perf Status: Waiting on a perf run to be completed. label Sep 29, 2018
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@rust-timer build 31ec4bcad01a3a5f6214474912ec7f53478414d7

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Success: Queued 31ec4bcad01a3a5f6214474912ec7f53478414d7 with parent 7e7bc06, comparison URL.

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Perf came back; looks clean to me.

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@RalfJung RalfJung added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. S-waiting-on-perf Status: Waiting on a perf run to be completed. labels Sep 30, 2018
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oli-obk commented Oct 1, 2018

@bors r+

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bors commented Oct 1, 2018

📌 Commit dd65d73 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 Oct 1, 2018
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bors commented Oct 1, 2018

⌛ Testing commit dd65d73 with merge 48e45914f2f6dc7499fee2c031c06cf4b4c5ddf7...

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pnkfelix commented Oct 1, 2018

@bors r+

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bors commented Oct 1, 2018

💡 This pull request was already approved, no need to approve it again.

  • This pull request is currently being tested. If there's no response from the continuous integration service, you may use retry to trigger a build again.

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bors commented Oct 1, 2018

📌 Commit dd65d73 has been approved by pnkfelix

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bors commented Oct 1, 2018

⌛ Testing commit dd65d73 with merge de3d640...

bors added a commit that referenced this pull request Oct 1, 2018
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Auto merge of #54667 - RalfJung:maybe-uninit, r=pnkfelix
de3d640 
Panic when using mem::uninitialized or mem::zeroed on an uninhabited type

All code by @japaric. This re-submits one half of #53508. This is likely not the one that introduced the perf regression, but just to be sure I'll do a perf run anyway.
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bors commented Oct 1, 2018

☀️ Test successful - status-appveyor, status-travis
Approved by: pnkfelix
Pushing de3d640 to master...

@bors bors merged commit dd65d73 into rust-lang:master Oct 1, 2018
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bors added a commit that referenced this pull request Oct 8, 2018
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Auto merge of #54668 - RalfJung:use-maybe-uninit, r=<try>
d4c1752 
Use MaybeUninit

All code by @japaric. This re-submits the second half of #53508 (the first half is at #54667). This is likely the one containing the perf regression.
bors added a commit that referenced this pull request Oct 10, 2018
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Auto merge of #54668 - RalfJung:use-maybe-uninit, r=<try>
9177334 
Use MaybeUninit in libcore

All code by @japaric. This re-submits the second half of #53508 (the first half is at #54667). This is likely the one containing the perf regression.
@RalfJung RalfJung deleted the maybe-uninit branch November 9, 2018 15:35
bors added a commit that referenced this pull request Nov 26, 2018
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Auto merge of #54668 - RalfJung:use-maybe-uninit, r=SimonSapin
75d937c 
Use MaybeUninit in libcore

All code by @japaric. This re-submits the second half of #53508 (the first half is at #54667). This is likely the one containing the perf regression.
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@RalfJung @rust-highfive @bors @rust-timer @scottmcm @oli-obk @pnkfelix @cramertj @japaric