Avoid a bunch of booleans in favor of Result<(), ErrorGuaranteed> as that more robustly proves that an error has been emitted #126317

oli-obk · 2024-06-12T10:22:29Z

pulled out of #126316

This PR cannot have any effect on compilation.
All it does is shift a Ty::new_misc_error to a span_delayed_bug and preserve the ErrorGuaranteed in all other cases

…s that more robustly proves that an error has been emitted

rustbot · 2024-06-12T10:22:37Z

r? @TaKO8Ki

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…ng it.

workingjubilee · 2024-06-12T10:27:55Z

This PR cannot have any effect on compilation.

hm, if so then
@bors rollup

compiler-errors · 2024-06-12T12:36:55Z

compiler/rustc_hir_typeck/src/expr.rs

+                if segment.ident.name == kw::Empty {
+                    span_bug!(rcvr.span, "empty method name")
+                } else {
+                    match self.report_method_error(expr.hir_id, rcvr_t, error, expected, false) {


please make report_method_error return an ErrorGuaranteed. there's no reason to return Result<Diag, ErrorGuaranteed> when the only two callsites just call diag.emit().

compiler-errors · 2024-06-12T12:38:50Z

compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs

        };
-        if has_error {
+        if let Err(guar) = has_error {
            let err_inputs = self.err_args(args_no_rcvr.len());


make err_args take the ErrorGuaranteed

compiler-errors · 2024-06-12T12:40:19Z

compiler/rustc_hir_typeck/src/method/suggest.rs

@@ -576,7 +573,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
        no_match_data: &mut NoMatchData<'tcx>,
        expected: Expectation<'tcx>,
        trait_missing_method: bool,
-    ) -> Option<Diag<'_>> {
+    ) -> Result<Diag<'_>, ErrorGuaranteed> {


Suggested change

) -> Result<Diag<'_>, ErrorGuaranteed> {

) -> ErrorGuaranteed {

compiler-errors · 2024-06-12T12:41:54Z

compiler/rustc_hir_typeck/src/method/suggest.rs

@@ -608,24 +605,23 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {

        // We could pass the file for long types into these two, but it isn't strictly necessary
        // given how targeted they are.
-        if self.suggest_wrapping_range_with_parens(
+        self.suggest_wrapping_range_with_parens(


These probably shouldn't be named suggest_*, since they're emitting their own error. Could you think of a better name for this?

compiler-errors

r=me when ci is green

oli-obk · 2024-06-12T15:20:32Z

@bors r=compiler-errors

bors · 2024-06-12T15:20:35Z

📌 Commit 6299071 has been approved by compiler-errors

It is now in the queue for this repository.

…mpiler-errors Rollup of 8 pull requests Successful merges: - rust-lang#125869 (Add `target_env = "p1"` to the `wasm32-wasip1` target) - rust-lang#126019 (Add TODO comment to unsafe env modification) - rust-lang#126036 (Migrate `run-make/short-ice` to `rmake`) - rust-lang#126276 (Detect pub structs never constructed even though they impl pub trait with assoc constants) - rust-lang#126282 (Ensure self-contained linker is only enabled on dev/nightly ) - rust-lang#126317 (Avoid a bunch of booleans in favor of Result<(), ErrorGuaranteed> as that more robustly proves that an error has been emitted) - rust-lang#126324 (Adjust LoongArch64 data layouts for LLVM update) - rust-lang#126340 (Fix outdated predacates_of.rs comments) r? `@ghost` `@rustbot` modify labels: rollup

Rollup merge of rust-lang#126317 - oli-obk:recursive_rpit4, r=compiler-errors Avoid a bunch of booleans in favor of Result<(), ErrorGuaranteed> as that more robustly proves that an error has been emitted pulled out of rust-lang#126316 This PR cannot have any effect on compilation. All it does is shift a `Ty::new_misc_error` to a `span_delayed_bug` and preserve the `ErrorGuaranteed` in all other cases

RalfJung · 2024-08-10T13:27:28Z

compiler/rustc_log/src/lib.rs

@@ -101,13 +103,19 @@ pub fn init_logger(cfg: LoggerConfig) -> Result<(), Error> {
        Err(_) => false,
    };

+    let lines = match cfg.lines {
+        Ok(v) => &v == "1",
+        Err(_) => false,


I think a surprising side-effect of this change was to turn off the lines by default?

Even when they are turned on, they look very different... much harder than before to just "move up" and find earlier things on the same level of nesting, since the line is now just a snake that moves left and right with the indentation, it no longer properly shows what nesting level we are getting back to.

lines were already turned off in an earlier PR by someone else because they broke code folding which allowed you to fold entire sub-spans. After I switched tracing-tree to use the snaky line, you get both the lines (which I find useful) and the code folding, so I made it opt-in. Locally I was replacing | manually with spaces in the last year just to get code folding in IDEs.

What's "code folding"?

When you hover over the line numbers in vscode, folding thingies like for directories show up. These are indentation based I think, but in code they may be squirly bracket based

RalfJung · 2024-08-11T05:59:08Z

Ah I see. I often go through these logs in a terminal and I find the new format a lot harder to read there than the old one.

oli-obk added 2 commits June 12, 2024 10:11

Bump tracing-tree and allow rendering lines again

185a48d

Avoid a bunch of booleans in favor of Result<(), ErrorGuaranteed> a…

3da9289

…s that more robustly proves that an error has been emitted

rustbot assigned TaKO8Ki Jun 12, 2024

rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Jun 12, 2024

Upgrade a span_delayed_bug into a span_bug, as we have no tests hitti…

be464b8

…ng it.

compiler-errors requested changes Jun 12, 2024

View reviewed changes

compiler-errors assigned compiler-errors and unassigned TaKO8Ki Jun 12, 2024

oli-obk added 3 commits June 12, 2024 12:54

Eagerly emit the diagnostic instead of leaving it to all callers

4d72c42

Rename some functions

9065889

Avoid a Ty::new_misc_error when an ErrorGuaranteed is available

6299071

oli-obk requested a review from compiler-errors June 12, 2024 14:26

compiler-errors approved these changes Jun 12, 2024

View reviewed changes

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 Jun 12, 2024

compiler-errors mentioned this pull request Jun 12, 2024

Rollup of 8 pull requests #126345

Merged

bors merged commit 7276f34 into rust-lang:master Jun 12, 2024
6 checks passed

rustbot added this to the 1.81.0 milestone Jun 12, 2024

RalfJung reviewed Aug 10, 2024

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oli-obk deleted the recursive_rpit4 branch August 10, 2024 20:07

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Avoid a bunch of booleans in favor of Result<(), ErrorGuaranteed> as that more robustly proves that an error has been emitted #126317

Avoid a bunch of booleans in favor of Result<(), ErrorGuaranteed> as that more robustly proves that an error has been emitted #126317

oli-obk commented Jun 12, 2024

rustbot commented Jun 12, 2024

workingjubilee commented Jun 12, 2024

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RalfJung commented Aug 11, 2024 via email

	) -> Result<Diag<'_>, ErrorGuaranteed> {
	) -> ErrorGuaranteed {

Avoid a bunch of booleans in favor of Result<(), ErrorGuaranteed> as that more robustly proves that an error has been emitted #126317

Avoid a bunch of booleans in favor of Result<(), ErrorGuaranteed> as that more robustly proves that an error has been emitted #126317

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