From de38d24aac0b0be886abca7ce574a147b6c8742c Mon Sep 17 00:00:00 2001
From: xflywind <43030857+ringabout@users.noreply.github.com>
Date: Sat, 20 Aug 2022 10:57:37 +0800
Subject: [PATCH] fixes #20219; ignore comment/empty node in stmtListExpr

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

diff --git a/compiler/jsgen.nim b/compiler/jsgen.nim
index 60d10f58de5df..5829a992a6eca 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