Rollup merge of #98530 - davidkna:known-bug-ref, r=Mark-Simulacrum

compiletest: add issue number param to `known-bug`

I was getting some errors while testing this, but I'm pretty sure that was unrelated to my changes.

Closes #98436

> Basically, instead of `// known-bug`, do `// known-bug #00000` or maybe `// known-bug chalk#00`?
>
> From: https://rust-lang.zulipchat.com/#narrow/stream/326866-t-types.2Fnominated/topic/.2398095.3A.20NLL.3A.20unsound.20verification.20of.20higher.20ranked.20outlives.E2.80.A6/near/287258738

I also added an `unknown` escape-hatch because I didn't find corresponding issues for every `// known-bug`.

The syntax also ended up being `// known-bug: `, because of `set_name_value_directive`.

src/test/ui/chalkify/bugs/async.rs

@@ -1,5 +1,5 @@
 // check-fail
-// known-bug
+// known-bug: unknown
 // compile-flags: -Z chalk --edition=2021
 
 fn main() -> () {}

src/test/ui/generic-associated-types/bugs/issue-80626.rs

@@ -1,5 +1,5 @@
 // check-fail
-// known-bug
+// known-bug: #80626
 
 // This should pass, but it requires `Sized` to be coinductive.
 

src/test/ui/generic-associated-types/bugs/issue-86218.rs

@@ -1,5 +1,5 @@
 // check-fail
-// known-bug
+// known-bug: #86218
 
 // This should pass, but seems to run into a TAIT issue.
 

src/test/ui/generic-associated-types/bugs/issue-87735.rs

@@ -1,5 +1,5 @@
 // check-fail
-// known-bug
+// known-bug: #87735, #88526
 
 // This should pass, but we need an extension of implied bounds (probably).
 

src/test/ui/generic-associated-types/bugs/issue-87748.rs

@@ -1,5 +1,5 @@
 // check-fail
-// known-bug
+// known-bug: #87748
 
 // This should pass, but unnormalized input args aren't treated as implied.
 

src/test/ui/generic-associated-types/bugs/issue-87755.rs

@@ -1,5 +1,5 @@
 // check-fail
-// known-bug
+// known-bug: #87755
 
 // This should pass.
 

src/test/ui/generic-associated-types/bugs/issue-87803.rs

@@ -1,5 +1,5 @@
 // check-fail
-// known-bug
+// known-bug: #87803
 
 // This should pass, but using a type alias vs a reference directly
 // changes late-bound -> early-bound.

src/test/ui/generic-associated-types/bugs/issue-88382.rs

@@ -1,5 +1,5 @@
 // check-fail
-// known-bug
+// known-bug: #88382
 
 // This should pass, but has a missed normalization due to HRTB.
 

src/test/ui/generic-associated-types/bugs/issue-88460.rs

@@ -1,5 +1,5 @@
 // check-fail
-// known-bug
+// known-bug: #88460
 
 // This should pass, but has a missed normalization due to HRTB.
 

src/test/ui/generic-associated-types/bugs/issue-88526.rs

@@ -1,5 +1,5 @@
 // check-fail
-// known-bug
+// known-bug: #88526
 
 // This should pass, but requires more logic.
 

src/test/ui/generic-associated-types/bugs/issue-89008.rs

@@ -1,6 +1,6 @@
 // check-fail
 // edition:2021
-// known-bug
+// known-bug: #88908
 
 // This should pass, but seems to run into a TAIT bug.
 

src/test/ui/hrtb/issue-95034.rs

@@ -1,4 +1,4 @@
-// known-bug
+// known-bug: #95034
 // failure-status: 101
 // compile-flags: --edition=2021 --crate-type=lib
 // rustc-env:RUST_BACKTRACE=0

src/test/ui/issues/issue-47511.rs

@@ -1,5 +1,5 @@
 // check-fail
-// known-bug
+// known-bug: #47511
 
 // Regression test for #47511: anonymous lifetimes can appear
 // unconstrained in a return type, but only if they appear just once

src/test/ui/trait-bounds/select-param-env-instead-of-blanket.rs

@@ -1,4 +1,4 @@
-// known-bug
+// known-bug: #93008
 // build-fail
 // failure-status: 101
 // compile-flags:--crate-type=lib -Zmir-opt-level=3

src/test/ui/type-alias-impl-trait/cross_inference_pattern_bug_no_type.rs

@@ -1,4 +1,4 @@
-// known-bug
+// known-bug: #96572
 // compile-flags: --edition=2021 --crate-type=lib
 // rustc-env:RUST_BACKTRACE=0
 

src/test/ui/type-alias-impl-trait/issue-57611-trait-alias.rs

@@ -1,7 +1,7 @@
 // Regression test for issue #57611
 // Ensures that we don't ICE
 // FIXME: This should compile, but it currently doesn't
-// known-bug
+// known-bug: unknown
 
 #![feature(trait_alias)]
 #![feature(type_alias_impl_trait)]

src/tools/compiletest/src/header.rs

@@ -395,7 +395,29 @@ impl TestProps {
                 );
                 config.set_name_directive(ln, STDERR_PER_BITWIDTH, &mut self.stderr_per_bitwidth);
                 config.set_name_directive(ln, INCREMENTAL, &mut self.incremental);
-                config.set_name_directive(ln, KNOWN_BUG, &mut self.known_bug);
+
+                // Unlike the other `name_value_directive`s this needs to be handled manually,
+                // because it sets a `bool` flag.
+                if let Some(known_bug) = config.parse_name_value_directive(ln, KNOWN_BUG) {
+                    let known_bug = known_bug.trim();
+                    if known_bug == "unknown"
+                        || known_bug.split(',').all(|issue_ref| {
+                            issue_ref
+                                .trim()
+                                .split_once('#')
+                                .filter(|(_, number)| {
+                                    number.chars().all(|digit| digit.is_numeric())
+                                })
+                                .is_some()
+                        })
+                    {
+                        self.known_bug = true;
+                    } else {
+                        panic!(
+                            "Invalid known-bug value: {known_bug}\nIt requires comma-separated issue references (`#000` or `chalk#000`) or `unknown`."
+                        );
+                    }
+                }
                 config.set_name_value_directive(ln, MIR_UNIT_TEST, &mut self.mir_unit_test, |s| {
                     s.trim().to_string()
                 });