Flesh out sections about crashes tests and update mentions of glacier

Author: fmease

src/fuzzing.md

@@ -74,20 +74,30 @@ To build a corpus, you may want to use:
 - The rustc/rust-analyzer/clippy test suites (or even source code) --- though avoid
   tests that are already known to cause failures, which often begin with comments
   like `// failure-status: 101` or `// known-bug: #NNN`.
-- The already-fixed ICEs in [Glacier][glacier] --- though avoid the unfixed
-  ones in `ices/`!
+- The already-fixed ICEs in the archived [Glacier][glacier] repository --- though
+  avoid the unfixed ones in `ices/`!
+
+[glacier]: https://github.com/rust-lang/glacier
 
 ## Extra credit
 
 Here are a few things you can do to help the Rust project after filing an ICE.
 
-- [Bisect][bisect] the bug to figure out when it was introduced 
+- [Bisect][bisect] the bug to figure out when it was introduced.
+  If you find the regressing PR / commit, you can mark the issue with the label
+  `S-has-bisection`. If not, consider applying `E-needs-bisection` instead.
 - Fix "distractions": problems with the test case that don't contribute to
   triggering the ICE, such as syntax errors or borrow-checking errors
-- Minimize the test case (see below)
-- Add the minimal test case to [Glacier][glacier]
+- Minimize the test case (see below). If successful, you can label the
+  issue with `S-has-mcve`. Otherwise, you can apply `E-needs-mcve`.
+- Add the minimal test case to the rust-lang/rust repo as a [crashes test].
+  While you're at it, consider including other "untracked" crashes in your PR.
+  Please don't forget to mark your issue with `S-bug-has-test` afterwards.
+
+See also [applying and removing labels][labeling].
 
 [bisect]: https://rust-lang.github.io/cargo-bisect-rustc/
+[labeling]: https://forge.rust-lang.org/release/issue-triaging.html#applying-and-removing-labels
 
 ## Minimization
 
@@ -143,7 +153,6 @@ ICEs that require debug assertions to reproduce should be tagged
 - [tree-splicer][tree-splicer] generates new source files by combining existing
   ones while maintaining correct syntax
 
-[glacier]: https://github.com/rust-lang/glacier
 [fuzz-rustc]: https://github.com/dwrensha/fuzz-rustc
 [icemaker]: https://github.com/matthiaskrgr/icemaker/
 [tree-splicer]: https://github.com/langston-barrett/tree-splicer/

src/getting-started.md

@@ -89,7 +89,7 @@ filtering the search to areas you're interested in. For example:
 Not all important or beginner work has issue labels.
 See below for how to find work that isn't labelled.
 
-[help-wanted-search]: https://github.com/issues?q=is%3Aopen+is%3Aissue+org%3Arust-lang+no%3Aassignee+label%3AE-easy%2C%22good+first+issue%22%2Cgood-first-issue%2CE-medium%2CEasy%2CE-help-wanted%2CE-mentor+-label%3AS-blocked+-linked:pr+
+[help-wanted-search]: https://github.com/issues?q=is%3Aopen+is%3Aissue+org%3Arust-lang+no%3Aassignee+label%3AE-easy%2C%22good+first+issue%22%2Cgood-first-issue%2CE-medium%2CEasy%2CE-help-wanted%2CE-mentor+-label%3AS-blocked+-linked%3Apr+
 [Triage]: ./contributing.md#issue-triage
 
 ### Recurring work

src/tests/compiletest.md

@@ -546,7 +546,7 @@ only running the main `coverage` suite.
 
 [`tests/crashes`] serve as a collection of tests that are expected to cause the
 compiler to ICE, panic or crash in some other way, so that accidental fixes are
-tracked. This was formally done at <https://github.com/rust-lang/glacier> but
+tracked. Formerly, this was done at <https://github.com/rust-lang/glacier> but
 doing it inside the rust-lang/rust testsuite is more convenient.
 
 It is imperative that a test in the suite causes rustc to ICE, panic, or
@@ -560,9 +560,12 @@ If you want to see verbose stdout/stderr, you need to set
 $ COMPILETEST_VERBOSE_CRASHES=1 ./x test tests/crashes/999999.rs --stage 1
 ```
 
-When adding crashes from <https://github.com/rust-lang/rust/issues>, the issue
-number should be noted in the file name (`12345.rs` should suffice) and also
-inside the file include a `//@ known-bug: #4321` directive.
+Anyone can add ["untracked" crashes] from the issue tracker. It's strongly
+recommended to include test cases from several issues in a single PR.
+When you do so, each issue number should be noted in the file name (`12345.rs`
+should suffice) and also inside the file by means of a `//@ known-bug: #12345`
+directive. Please [label][labeling] the relevant issues with `S-bug-has-test`
+afterwards.
 
 If you happen to fix one of the crashes, please move it to a fitting
 subdirectory in `tests/ui` and give it a meaningful name. Please add a doc
@@ -585,6 +588,8 @@ a subset first. The issue numbers can be found in the file name or the `//@
 known-bug` directive inside the test file.
 
 [`tests/crashes`]: https://github.com/rust-lang/rust/tree/master/tests/crashes
+["untracked" crashes]: https://github.com/rust-lang/rust/issues?q=is%3Aissue+state%3Aopen+label%3AI-ICE%2CI-crash+label%3AT-compiler+label%3AS-has-mcve+-label%3AS-bug-has-test
+[labeling]: https://forge.rust-lang.org/release/issue-triaging.html#applying-and-removing-labels
 
 ## Building auxiliary crates