fixes #7019

compiler/renderer.nim

@@ -898,6 +898,14 @@ proc gsub(g: var TSrcGen, n: PNode, c: TContext) =
       put(g, tkBracketLe, "[")
       gcomma(g, n, 2)
       put(g, tkBracketRi, "]")
+    elif n.len > 1 and n.lastSon.kind == nkStmtList:
+      gsub(g, n[0])
+      if n.len > 2:
+        put(g, tkParLe, "(")
+        gcomma(g, n, 1, -2)
+        put(g, tkParRi, ")")
+      put(g, tkColon, ":")
+      gsub(g, n, n.len-1)
     else:
       if sonsLen(n) >= 1: gsub(g, n.sons[0])
       put(g, tkParLe, "(")