From 793e1573d4415453abdd99a95e68f4cb983c35c2 Mon Sep 17 00:00:00 2001
From: Chayim Refael Friedman <chayimfr@gmail.com>
Date: Mon, 7 Jul 2025 20:44:18 +0300
Subject: [PATCH] Fix a case where the link type was `None`

Which caused a panic.
---
 crates/ide/src/doc_links.rs   |  6 +++---
 crates/ide/src/hover/tests.rs | 27 +++++++++++++++++++++++++++
 2 files changed, 30 insertions(+), 3 deletions(-)

diff --git a/crates/ide/src/doc_links.rs b/crates/ide/src/doc_links.rs
index f58202a421..a5d9a10d2e 100644
--- a/crates/ide/src/doc_links.rs
+++ b/crates/ide/src/doc_links.rs
@@ -505,7 +505,7 @@ fn map_links<'e>(
         Event::End(Tag::Link(link_type, target, _)) => {
             in_link = false;
             Event::End(Tag::Link(
-                end_link_type.unwrap_or(link_type),
+                end_link_type.take().unwrap_or(link_type),
                 end_link_target.take().unwrap_or(target),
                 CowStr::Borrowed(""),
             ))
@@ -514,7 +514,7 @@ fn map_links<'e>(
             let (link_type, link_target_s, link_name) =
                 callback(&end_link_target.take().unwrap(), &s, range, end_link_type.unwrap());
             end_link_target = Some(CowStr::Boxed(link_target_s.into()));
-            if !matches!(end_link_type, Some(LinkType::Autolink)) {
+            if !matches!(end_link_type, Some(LinkType::Autolink)) && link_type.is_some() {
                 end_link_type = link_type;
             }
             Event::Text(CowStr::Boxed(link_name.into()))
@@ -523,7 +523,7 @@ fn map_links<'e>(
             let (link_type, link_target_s, link_name) =
                 callback(&end_link_target.take().unwrap(), &s, range, end_link_type.unwrap());
             end_link_target = Some(CowStr::Boxed(link_target_s.into()));
-            if !matches!(end_link_type, Some(LinkType::Autolink)) {
+            if !matches!(end_link_type, Some(LinkType::Autolink)) && link_type.is_some() {
                 end_link_type = link_type;
             }
             Event::Code(CowStr::Boxed(link_name.into()))
diff --git a/crates/ide/src/hover/tests.rs b/crates/ide/src/hover/tests.rs
index f63499aa0f..c3afd7da2d 100644
--- a/crates/ide/src/hover/tests.rs
+++ b/crates/ide/src/hover/tests.rs
@@ -10958,3 +10958,30 @@ fn bar$0() -> Foo {
         "#]],
     );
 }
+
+#[test]
+fn regression_20190() {
+    check(
+        r#"
+struct Foo;
+
+/// [`foo` bar](Foo).
+fn has_docs$0() {}
+    "#,
+        expect![[r#"
+            *has_docs*
+
+            ```rust
+            ra_test_fixture
+            ```
+
+            ```rust
+            fn has_docs()
+            ```
+
+            ---
+
+            [`foo` bar](https://docs.rs/ra_test_fixture/*/ra_test_fixture/struct.Foo.html).
+        "#]],
+    );
+}