fix(es/codegen): Don't call cmt.get_leading for dummy span (#10568)

This was the only place where `Comments` were queried for dummy spans (`BytePos(0)`)

Author: mischnic

.changeset/sixty-pans-help.md

@@ -0,0 +1,6 @@
+---
+swc_ecma_codegen: patch
+swc_core: patch
+---
+
+Don't call `cmt.get_leading` for dummy span

crates/swc_ecma_codegen/src/lib.rs

@@ -1382,6 +1382,10 @@ fn is_empty_comments(span: &Span, comments: &Option<&dyn Comments>) -> bool {
 fn span_has_leading_comment(cmt: &dyn Comments, span: Span) -> bool {
  let lo = span.lo;
 
+ if lo.is_dummy() {
+ return false;
+ }
+
  // see #415
  if let Some(cmt) = cmt.get_leading(lo) {
  if cmt.iter().any(|cmt| {