From 9d9ecc3c1d774a71b4b866d7e503b25c307e7cbf Mon Sep 17 00:00:00 2001
From: ringabout <43030857+ringabout@users.noreply.github.com>
Date: Wed, 24 Aug 2022 15:28:46 +0800
Subject: [PATCH] fixes #20219; ignore comment/empty node in stmtListExpr
 (#20249)

---
 compiler/jsgen.nim | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/compiler/jsgen.nim b/compiler/jsgen.nim
index b30d035793..39009bd2f0 100644
--- a/compiler/jsgen.nim
+++ b/compiler/jsgen.nim
@@ -320,6 +320,10 @@ proc isSimpleExpr(p: PProc; n: PNode): bool =
     for c in n:
       if not p.isSimpleExpr(c): return false
     result = true
+  elif n.kind == nkStmtListExpr:
+    for i in 0..<n.len-1:
+      if n[i].kind notin {nkCommentStmt, nkEmpty}: return false
+    result = isSimpleExpr(p, n.lastSon)
   elif n.isAtom:
     result = true