fix(es/codegen): Exclude synthesized files from sourcemap (#4714)

crates/swc/src/lib.rs

@@ -604,6 +604,14 @@ impl SourceMapGenConfig for SwcSourceMapConfig<'_> {
     fn emit_columns(&self, _f: &FileName) -> bool {
         self.emit_columns
     }
+
+    fn skip(&self, f: &FileName) -> bool {
+        if let FileName::Custom(s) = f {
+            s.starts_with('<')
+        } else {
+            false
+        }
+    }
 }
 
 pub(crate) fn minify_file_comments(

crates/swc_common/src/source_map.rs

@@ -1205,6 +1205,9 @@ impl SourceMap {
                     &f
                 }
             };
+            if config.skip(&f.name) {
+                continue;
+            }
 
             let emit_columns = config.emit_columns(&f.name);
 
@@ -1342,6 +1345,10 @@ pub trait SourceMapGenConfig {
     fn emit_columns(&self, _f: &FileName) -> bool {
         true
     }
+
+    fn skip(&self, _f: &FileName) -> bool {
+        false
+    }
 }
 
 #[derive(Debug, Clone)]