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This works by adding a boolean flag, `continue_after_error`, to
`syntax::errors::Handler` that can be imperatively set to `true` or
`false` via a new `fn set_continue_after_error`.
The flag starts off true (since we generally try to recover from
compiler errors, and `Handler` is shared across all phases).
Then, during the `phase_1_parse_input`, we consult the setting of the
`-Z continue-parse-after-error` debug flag to determine whether we
should leave the flag set to `true` or should change it to `false`.
----
(We might consider adding a debugflag to do such aborts in other
places where we are currently attempting recovery, such as resolve,
but I think the parser is the really important case to handle in the
face of #31994 and the parser bugs of varying degrees that were
injected by parse error recovery.)
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Automated conversion using the untry tool [1] and the following command:
```
$ find -name '*.rs' -type f | xargs untry
```
at the root of the Rust repo.
[1]: https://github.com/japaric/untry
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A span spanning only a single character would render like `^~`
instead of just `^`.
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This allows to render multiple spans on one line,
or to splice multiple replacements into a code suggestion.
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r? @eddyb or @nrc
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There is now more structure to the report, so that you can specify e.g. an RFC/PR/issue number and other explanatory details.
Example message:
```
type-parameter-invalid-lint.rs:14:8: 14:9 error: defaults for type parameters are only allowed on type definitions, like `struct` or `enum`
type-parameter-invalid-lint.rs:14 fn avg<T=i32>(_: T) {}
^
type-parameter-invalid-lint.rs:14:8: 14:9 warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
type-parameter-invalid-lint.rs:14:8: 14:9 note: for more information, see PR 30742 <https://github.com/rust-lang/rust/pull/30724>
type-parameter-invalid-lint.rs:11:9: 11:28 note: lint level defined here
type-parameter-invalid-lint.rs:11 #![deny(future_incompatible)]
^~~~~~~~~~~~~~~~~~~
error: aborting due to previous error
```
r? @brson
I would really like feedback also on the specific messages!
Fixes #30746
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And fix bustage in make check
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[breaking-change]
syntax::errors::Handler::new has been renamed to with_tty_emitter
Many functions which used to take a syntax::errors::ColorConfig, now take a rustc::session::config::ErrorOutputType. If you previously used ColorConfig::Auto as a default, you should now use ErrorOutputType::default().
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better
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d'oh
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