Rich-Harris
diff --git a/‎src/Bundle.ts‎
Lines changed: 2 additions & 0 deletions b/‎src/Bundle.ts‎
Lines changed: 2 additions & 0 deletions
diff --git a/‎src/MagicString.ts‎
Lines changed: 6 additions & 1 deletion b/‎src/MagicString.ts‎
Lines changed: 6 additions & 1 deletion
diff --git a/‎test/Bundle.test.ts‎
Lines changed: 23 additions & 0 deletions b/‎test/Bundle.test.ts‎
Lines changed: 23 additions & 0 deletions
diff --git a/‎test/MagicString.test.ts‎
Lines changed: 34 additions & 0 deletions b/‎test/MagicString.test.ts‎
Lines changed: 34 additions & 0 deletions
@@ -124,6 +124,8 @@ export default class Bundle {
       bundle.addSource({
         filename: source.filename,
         content: source.content.clone(),
+        ignoreList: source.ignoreList,
+        indentExclusionRanges: source.indentExclusionRanges,
         separator: source.separator,
       })
     })
 
@@ -193,7 +193,11 @@ export default class MagicString {
    * Does what you'd expect.
    */
   clone(): this {
-    const cloned = new MagicString(this.original, { filename: this.filename, offset: this.offset })
+    const cloned = new MagicString(this.original, {
+      filename: this.filename,
+      ignoreList: this.ignoreList,
+      offset: this.offset,
+    })
 
     let originalChunk = this.firstChunk
     let clonedChunk = (cloned.firstChunk = cloned.lastSearchedChunk = originalChunk.clone())
@@ -224,6 +228,7 @@ export default class MagicString {
     }
 
     cloned.sourcemapLocations = new BitSet(this.sourcemapLocations)
+    cloned.storedNames = { ...this.storedNames }
 
     cloned.intro = this.intro
     cloned.outro = this.outro
 
@@ -108,6 +108,29 @@ describe('bundle', () => {
       assert.equal(b.toString(), '>>>abXXef\nghijkl<<<')
       assert.equal(clone.toString(), '>>>abcdef\nghijkl<<<')
     })
+    it('should clone the ignore-list hint', () => {
+      const b = new Bundle() as BundleInternals
+
+      b.addSource({ content: new MagicString('foo', { filename: 'foo.js' }), ignoreList: true })
+
+      const clone = b.clone() as BundleInternals
+
+      assert.strictEqual(clone.sources[0].ignoreList, true)
+      assert.deepEqual(clone.generateMap({ includeContent: false }).x_google_ignoreList, [0])
+    })
+
+    it('should clone indentExclusionRanges', () => {
+      const b = new Bundle() as BundleInternals
+
+      b.addSource({
+        content: new MagicString('foo', { filename: 'foo.js' }),
+        indentExclusionRanges: [1, 2],
+      })
+
+      const clone = b.clone() as BundleInternals
+
+      assert.deepEqual(clone.sources[0].indentExclusionRanges, [1, 2])
+    })
   })
 
   describe('generateMap', () => {
 
@@ -207,6 +207,40 @@ describe('magicString', () => {
 
       assert.equal(source.toString(), clone.toString())
     })
+
+    it('should clone the ignore-list hint', () => {
+      const source = new MagicString('abcdefghijkl', {
+        filename: 'foo.js',
+        ignoreList: true,
+      })
+
+      const clone = source.clone()
+
+      assert.equal(clone.ignoreList, true)
+      assert.deepEqual(clone.generateMap({ includeContent: false }).x_google_ignoreList, [0])
+    })
+
+    it('should clone stored names', () => {
+      const source = new MagicString('abcdefghijkl', { filename: 'foo.js' })
+
+      source.update(3, 9, 'XYZ', { storeName: true })
+
+      const clone = source.clone()
+
+      assert.notStrictEqual(source.storedNames, clone.storedNames)
+      assert.deepEqual(clone.generateMap({ includeContent: false }).names, ['defghi'])
+    })
+
+    it('should not share stored names with the clone', () => {
+      const source = new MagicString('abcdefghijkl', { filename: 'foo.js' })
+
+      source.update(3, 9, 'XYZ', { storeName: true })
+
+      const clone = source.clone()
+      clone.update(0, 3, 'ABC', { storeName: true })
+
+      assert.deepEqual(source.generateMap({ includeContent: false }).names, ['defghi'])
+    })
   })
 
   describe('generateMap', () => {