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Trim discriminants to their final type size #49403

Merged
merged 2 commits into from
Mar 30, 2018
Merged

Trim discriminants to their final type size #49403

merged 2 commits into from
Mar 30, 2018

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oli-obk
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@oli-obk oli-obk commented Mar 27, 2018

r? @eddyb

fixes #49181

@pietroalbini pietroalbini added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Mar 27, 2018
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eddyb commented Mar 27, 2018

@bors r+

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bors commented Mar 27, 2018

📌 Commit 6b3202a has been approved by eddyb

@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 27, 2018
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kennytm commented Mar 27, 2018

@bors r-

[00:53:07] ---- [run-pass] run-pass/match-arm-statics.rs stdout ----
[00:53:07] 	
[00:53:07] error: compilation failed!
[00:53:07] status: exit code: 101
[00:53:07] command: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2/bin/rustc" "/checkout/src/test/run-pass/match-arm-statics.rs" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass" "--target=x86_64-unknown-linux-gnu" "-C" "prefer-dynamic" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass/match-arm-statics.stage2-x86_64-unknown-linux-gnu" "-Crpath" "-O" "-Zmiri" "-Zunstable-options" "-Lnative=/checkout/obj/build/x86_64-unknown-linux-gnu/native/rust-test-helpers" "-g" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/test/run-pass/match-arm-statics.stage2-x86_64-unknown-linux-gnu.aux"
[00:53:07] stdout:
[00:53:07] ------------------------------------------
[00:53:07] 
[00:53:07] ------------------------------------------
[00:53:07] stderr:
[00:53:07] ------------------------------------------
[00:53:07] error: internal compiler error: librustc_mir/hair/pattern/mod.rs:873: discriminant 4 not found in [
[00:53:07]     Discr {
[00:53:07]         val: 0,
[00:53:07]         ty: isize
[00:53:07]     },
[00:53:07]     Discr {
[00:53:07]         val: 1,
[00:53:07]         ty: isize
[00:53:07]     },
[00:53:07]     Discr {
[00:53:07]         val: 2,
[00:53:07]         ty: isize
[00:53:07]     },
[00:53:07]     Discr {
[00:53:07]         val: 3,
[00:53:07]         ty: isize
[00:53:07]     }
[00:53:07] ]
[00:53:07] 
[00:53:07] thread 'rustc' panicked at 'Box<Any>', librustc_errors/lib.rs:543:9
[00:53:07] note: Run with `RUST_BACKTRACE=1` for a backtrace.
[00:53:07] error: aborting due to previous error
[00:53:07] 
[00:53:07] 
[00:53:07] note: the compiler unexpectedly panicked. this is a bug.
[00:53:07] 
[00:53:07] note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports
[00:53:07] 
[00:53:07] note: rustc 1.26.0-dev running on x86_64-unknown-linux-gnu
[00:53:07] 
[00:53:07] note: compiler flags: -Z miri -Z unstable-options -C prefer-dynamic -C rpath
[00:53:07] 
[00:53:07] 
[00:53:07] ------------------------------------------
[00:53:07] 
[00:53:07] thread '[run-pass] run-pass/match-arm-statics.rs' panicked at 'explicit panic', tools/compiletest/src/runtest.rs:2901:9
[00:53:07] note: Run with `RUST_BACKTRACE=1` for a backtrace.
[00:53:07] 
[00:53:07] 
[00:53:07] failures:
[00:53:07]     [run-pass] run-pass/match-arm-statics.rs

@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 27, 2018
@kennytm kennytm 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. labels Mar 27, 2018
oli-obk
oli-obk commented Mar 28, 2018
View reviewed changes
src/librustc_mir/hair/pattern/mod.rs Outdated
ty::layout::Variants::NicheFilling { dataful_variant, .. } =>
dataful_variant,
ty::layout::Variants::NicheFilling { .. } => {
assert_eq!(discr_val as usize as u128, discr_val);
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ping @eddyb works now

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oli-obk commented Mar 30, 2018

@bors r=eddyb

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bors commented Mar 30, 2018

📌 Commit 422efd7 has been approved by eddyb

@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 30, 2018
@oli-obk oli-obk added the beta-nominated Nominated for backporting to the compiler in the beta channel. label Mar 30, 2018
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bors commented Mar 30, 2018

⌛ Testing commit 422efd7 with merge 4379c86...

bors added a commit that referenced this pull request Mar 30, 2018
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Auto merge of #49403 - oli-obk:try2, r=eddyb
4379c86 
Trim discriminants to their final type size

r? @eddyb

fixes  #49181
eddyb
eddyb reviewed Mar 30, 2018
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src/librustc_mir/hair/pattern/mod.rs
@@ -851,13 +851,38 @@ impl<'a, 'tcx> PatternContext<'a, 'tcx> {
ty::TyAdt(adt_def, substs) if adt_def.is_enum() => {
match cv.val {
ConstVal::Value(val) => {
let discr = const_discr(
let discr_val = const_discr(
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Didn't we discuss that what const_discr calls is wrong, and the Tagged handling below should be fixed in there too?

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Ugh the PR just got merged >_<

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bors commented Mar 30, 2018

☀️ Test successful - status-appveyor, status-travis
Approved by: eddyb
Pushing 4379c86 to master...

@bors bors merged commit 422efd7 into rust-lang:master Mar 30, 2018
@oli-obk oli-obk deleted the try2 branch March 30, 2018 14:12
@kennytm kennytm removed the beta-nominated Nominated for backporting to the compiler in the beta channel. label Mar 30, 2018
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kennytm commented Mar 30, 2018

Removing "beta-nominated" tag since we didn't have a beta yet.

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