Add regression test for #153837

tests/run-make-cargo/rustdoc-scrape-examples-duplicated-calls/Cargo.toml

@@ -0,0 +1,10 @@
+[workspace]
+
+[package]
+edition = "2024"
+name = "tester"
+version = "0.1.0"
+
+[[example]]
+doc-scrape-examples = true
+name = "window"

tests/run-make-cargo/rustdoc-scrape-examples-duplicated-calls/examples/window.rs

@@ -0,0 +1,24 @@
+#![allow(dead_code)]
+use tester::Window;
+
+macro_rules! info {
+    ($s:literal, $x:expr) => {{
+        let _ = $x;
+    }};
+}
+
+struct WindowState {
+    window: Window,
+}
+
+impl WindowState {
+    fn takes_ref(&self) {
+        info!("{:?}", self.window.id());
+    }
+
+    fn takes_mut(&mut self) {
+        info!("{:?}", self.window.id());
+    }
+}
+
+fn main() {}

tests/run-make-cargo/rustdoc-scrape-examples-duplicated-calls/rmake.rs

@@ -0,0 +1,11 @@
+//! This test ensures that the call locations are not duplicated when generating scraped examples.
+//! To ensure that, we check that this call doesn't fail.
+//! Regression test for <https://github.com/rust-lang/rust/issues/153837>.
+
+use run_make_support::{cargo, htmldocck};
+
+fn main() {
+    cargo().args(["rustdoc", "-Zunstable-options", "-Zrustdoc-scrape-examples"]).run();
+
+    htmldocck().arg("target/doc").arg("src/lib.rs").run();
+}

tests/run-make-cargo/rustdoc-scrape-examples-duplicated-calls/src/lib.rs

@@ -0,0 +1,13 @@
+//@has tester/struct.Window.html
+//@count - '//*[@class="docblock scraped-example-list"]//span[@class="highlight"]' 1
+//@has - '//*[@class="docblock scraped-example-list"]//span[@class="highlight"]' 'id'
+//@count - '//*[@class="docblock scraped-example-list"]//span[@class="highlight focus"]' 1
+//@has - '//*[@class="docblock scraped-example-list"]//span[@class="highlight focus"]' 'id'
+
+pub struct Window {}
+
+impl Window {
+    pub fn id(&self) -> u64 {
+        todo!()
+    }
+}