fix(es/compat): Don't add pure annotations to dummy spans (#8172)

**Related issue:**

 - Closes #8155.
 - Closes #8173.

Author: kdy1

crates/jsdoc/tests/fixture.rs

@@ -141,6 +141,8 @@ impl Comments for SwcComments {
     }
 
     fn add_pure_comment(&self, pos: BytePos) {
+        assert_ne!(pos, BytePos(0), "cannot add pure comment to zero position");
+
         let mut leading = self.leading.entry(pos).or_default();
         let pure_comment = Comment {
             kind: CommentKind::Block,

crates/swc/tests/exec/issues-8xxx/8155/.swcrc

@@ -0,0 +1,24 @@
+{
+    "jsc": {
+        "parser": {
+            "syntax": "typescript",
+            "decorators": true,
+            "tsx": false
+        },
+        "transform": {
+            "legacyDecorator": true
+        },
+        "target": "es5",
+        // "loose": false,
+        "minify": {
+            "compress": false,
+            "mangle": false
+        },
+        "loose": false
+    },
+    "module": {
+        "type": "es6"
+    },
+    "minify": false,
+    "isModule": true
+}