Rollup merge of #130582 - notriddle:notriddle/doctest-span, r=GuillaumeGomez

rustdoc: use the correct span for doctests

Fixes #130470

Author: matthiaskrgr

src/librustdoc/doctest/rust.rs

@@ -122,23 +122,14 @@ impl<'a, 'tcx> HirCollector<'a, 'tcx> {
         // anything else, this will combine them for us.
         let attrs = Attributes::from_ast(ast_attrs);
         if let Some(doc) = attrs.opt_doc_value() {
-            // Use the outermost invocation, so that doctest names come from where the docs were written.
-            let span = ast_attrs
-                .iter()
-                .find(|attr| attr.doc_str().is_some())
-                .map(|attr| attr.span.ctxt().outer_expn().expansion_cause().unwrap_or(attr.span))
-                .unwrap_or(DUMMY_SP);
+            let span = span_of_fragments(&attrs.doc_strings).unwrap_or(sp);
             self.collector.position = span;
             markdown::find_testable_code(
                 &doc,
                 &mut self.collector,
                 self.codes,
                 self.enable_per_target_ignores,
-                Some(&crate::html::markdown::ExtraInfo::new(
-                    self.tcx,
-                    def_id,
-                    span_of_fragments(&attrs.doc_strings).unwrap_or(sp),
-                )),
+                Some(&crate::html::markdown::ExtraInfo::new(self.tcx, def_id, span)),
             );
         }
 

tests/rustdoc-ui/doctest/doctest-output-include-fail.md

@@ -0,0 +1,7 @@
+With a code sample, that has an error:
+
+```rust
+fn main() {
+    let x = 234 // no semicolon here! oh no!
+}
+```

tests/rustdoc-ui/doctest/doctest-output-include-fail.rs

@@ -0,0 +1,7 @@
+//@ compile-flags:--test --test-args=--test-threads=1
+//@ normalize-stdout-test: "tests/rustdoc-ui/doctest" -> "$$DIR"
+//@ normalize-stdout-test: "finished in \d+\.\d+s" -> "finished in $$TIME"
+//@ failure-status: 101
+
+// https://github.com/rust-lang/rust/issues/130470
+#![doc = include_str!("doctest-output-include-fail.md")]

tests/rustdoc-ui/doctest/doctest-output-include-fail.stdout

@@ -0,0 +1,24 @@
+
+running 1 test
+test $DIR/doctest-output-include-fail.md - (line 3) ... FAILED
+
+failures:
+
+---- $DIR/doctest-output-include-fail.md - (line 3) stdout ----
+error: expected `;`, found `}`
+  --> $DIR/doctest-output-include-fail.md:5:16
+   |
+LL |     let x = 234 // no semicolon here! oh no!
+   |                ^ help: add `;` here
+LL | }
+   | - unexpected token
+
+error: aborting due to 1 previous error
+
+Couldn't compile the test.
+
+failures:
+    $DIR/doctest-output-include-fail.md - (line 3)
+
+test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in $TIME
+

tests/rustdoc-ui/doctest/doctest-output.stdout

@@ -1,7 +1,7 @@
 
 running 3 tests
 test $DIR/doctest-output.rs - (line 8) ... ok
-test $DIR/doctest-output.rs - ExpandedStruct (line 24) ... ok
+test $DIR/doctest-output.rs - ExpandedStruct (line 25) ... ok
 test $DIR/doctest-output.rs - foo::bar (line 18) ... ok
 
 test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in $TIME