fix(js_formatter): fix #1511

CHANGELOG.md

@@ -32,6 +32,8 @@ Read our [guidelines for writing a good changelog entry](https://github.com/biom
 
 - Fix [#1172](https://github.com/biomejs/biome/issues/1172). Fix placement of line comment after function expression parentheses, they are now attached to first statement in body. Contributed by @kalleep
 
+- Fix [#1511](https://github.com/biomejs/biome/issues/1511) that made the JavaScript formatter crash. COntributed @Conaclos
+
 ### JavaScript APIs
 
 ### Linter

crates/biome_formatter/src/buffer.rs

@@ -557,10 +557,6 @@ fn clean_interned(
                 Some((mut cleaned, rest)) => {
                     let mut is_in_expanded_conditional_content = false;
                     for element in rest {
-                        if is_in_expanded_conditional_content {
-                            continue;
-                        }
-
                         let element = match element {
                             FormatElement::Tag(Tag::StartConditionalContent(condition))
                                 if condition.mode == PrintMode::Expanded =>

crates/biome_js_formatter/tests/specs/ts/issue1511.ts

@@ -0,0 +1,3 @@
+call(a, function (b: () => t1 | t2) {});
+
+call(a, (b: () => t1 | t2) => {});

crates/biome_js_formatter/tests/specs/ts/issue1511.ts.snap

@@ -0,0 +1,43 @@
+---
+source: crates/biome_formatter_test/src/snapshot_builder.rs
+info: ts/issue1511.ts
+---
+
+# Input
+
+```ts
+call(a, function (b: () => t1 | t2) {});
+
+call(a, (b: () => t1 | t2) => {});
+
+```
+
+
+=============================
+
+# Outputs
+
+## Output 1
+
+-----
+Indent style: Tab
+Indent width: 2
+Line ending: LF
+Line width: 80
+Quote style: Double Quotes
+JSX quote style: Double Quotes
+Quote properties: As needed
+Trailing comma: All
+Semicolons: Always
+Arrow parentheses: Always
+Bracket spacing: true
+Bracket same line: false
+-----
+
+```ts
+call(a, function (b: () => t1 | t2) {});
+
+call(a, (b: () => t1 | t2) => {});
+```
+
+

website/src/content/docs/internals/changelog.mdx

@@ -38,6 +38,8 @@ Read our [guidelines for writing a good changelog entry](https://github.com/biom
 
 - Fix [#1172](https://github.com/biomejs/biome/issues/1172). Fix placement of line comment after function expression parentheses, they are now attached to first statement in body. Contributed by @kalleep
 
+- Fix [#1511](https://github.com/biomejs/biome/issues/1511) that made the JavaScript formatter crash. COntributed @Conaclos
+
 ### JavaScript APIs
 
 ### Linter