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pnkfelix
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@pnkfelix pnkfelix commented Nov 1, 2019

As discussed on PR #65781, this is a targeted attempt to undo the main semantic change from PR #64324, by putting dylib back in the set of crate types that export generic symbols.

The main reason to do this is that PR #64324 had unanticipated side-effects that caused bugs like #64872, and in the opinion of @alexcrichton and myself, the impact of #64872 is worse than #64319.

In other words, it is better for us, in the short term, to reopen #64319 as currently unfixed for now than to introduce new bugs like #64872.

Fix #64872

Reopen #64319

…rics export).

Includes the anticipated fallout to run-make-fulldeps test suite from
this change. (We need to reopen issue 64319 as part of landing this.)
(Many thanks to alex for 1. making this even smaller than what I had
originally minimized, and 2. pointing out that there is precedent for
having ui tests with crate dependency chains of length > 2, thus
allowing me to avoid encoding this as a run-make test.)
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r? @davidtwco

(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 Nov 1, 2019
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pnkfelix commented Nov 1, 2019

r? @alexcrichton

@pnkfelix pnkfelix added the beta-nominated Nominated for backporting to the compiler in the beta channel. label Nov 1, 2019
@pnkfelix pnkfelix added the T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. label Nov 1, 2019
@alexcrichton
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@bors: r+

Thanks for all this @pnkfelix! And yeah the original PR (or so I thought) didn't impact share-generics in the general case, which I think you ended up finding out. I could be wrong though, and it could be good to revert anyway!

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bors commented Nov 1, 2019

📌 Commit 6457914 has been approved by alexcrichton

@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 Nov 1, 2019
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pnkfelix commented Nov 1, 2019

briefly discussed at today's T-compiler design meeting. Approved for beta-backport, (assuming it passes bors and lands successfully in nightly).

@pnkfelix pnkfelix added the beta-accepted Accepted for backporting to the compiler in the beta channel. label Nov 1, 2019
tmandry added a commit to tmandry/rust that referenced this pull request Nov 1, 2019
…r=alexcrichton

Revert PR 64324: dylibs export generics again (for now)

As discussed on PR rust-lang#65781, this is a targeted attempt to undo the main semantic change from PR rust-lang#64324, by putting `dylib` back in the set of crate types that export generic symbols.

The main reason to do this is that PR rust-lang#64324 had unanticipated side-effects that caused bugs like rust-lang#64872, and in the opinion of @alexcrichton and myself, the impact of rust-lang#64872 is worse than rust-lang#64319.

In other words, it is better for us, in the short term, to reopen rust-lang#64319 as currently unfixed for now than to introduce new bugs like rust-lang#64872.

Fix rust-lang#64872

Reopen rust-lang#64319
bors added a commit that referenced this pull request Nov 1, 2019
Rollup of 16 pull requests

Successful merges:

 - #65112 (Add lint and tests for unnecessary parens around types)
 - #65470 (Don't hide ICEs from previous incremental compiles)
 - #65471 (Add long error explanation for E0578)
 - #65857 (rustdoc: Resolve module-level doc references more locally)
 - #65902 (Make ItemContext available for better diagnositcs)
 - #65914 (Use structured suggestion for unnecessary bounds in type aliases)
 - #65946 (Make `promote_consts` emit the errors when required promotion fails)
 - #65960 (doc: reword iter module example and mention other methods)
 - #65963 (update submodules to rust-lang)
 - #65972 (Fix libunwind build: Define __LITTLE_ENDIAN__ for LE targets)
 - #65977 (Fix incorrect diagnostics for expected type in E0271 with an associated type)
 - #65995 (Add error code E0743 for "C-variadic has been used on a non-foreign function")
 - #65997 (Fix outdated rustdoc of Once::init_locking function)
 - #66002 (Stabilize float_to_from_bytes feature)
 - #66005 (vxWorks: remove code related unix socket)
 - #66018 (Revert PR 64324: dylibs export generics again (for now))

Failed merges:

r? @ghost
@bors bors merged commit 6457914 into rust-lang:master Nov 1, 2019
@Mark-Simulacrum
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It seems like the PR this reverts (#64324) did not ever land into beta, so presumably this PR also does not need to land into beta. De-nominating.

@Mark-Simulacrum Mark-Simulacrum removed beta-accepted Accepted for backporting to the compiler in the beta channel. beta-nominated Nominated for backporting to the compiler in the beta channel. labels Nov 1, 2019
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bjorn3 commented Nov 1, 2019

Thanks!

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