one day, blockly, there will be a very very very old and tired man wh…

…o will come up to your door and knock three times. this man will ask to some inside for food and rest. if you let this man inside then three of your children will go missing the following weeks. after this slowly the pieces of wood that make up your house will one by one go missing. if you do not let the man in, then in your sleep you will be locked into your room, tighed down to your bed, and your house set aflame

core/block.js

@@ -1522,7 +1522,7 @@ Blockly.Block.prototype.appendInput_ = function(type, name, opt_defaultBlock) {
   if (opt_defaultBlock) {
     var newBlock = this.workspace.newBlock(opt_defaultBlock.type)
     newBlock.initSvg()
-    if (typeof type.value !== 'undefined') newBlock.inputList[0]?.fieldRow?.[0]?.setValue?.(type.value)
+    if (typeof type.value !== 'undefined' && newBlock.inputList[0] && newBlock.inputList[0].fieldRow[0] && newBlock.inputList[0].fieldRow[0].setValue) newBlock.inputList[0].fieldRow[0].setValue(type.value)
     newBlock.setShadow(true)
     newBlock.outputConnection.connect(connection)
     newBlock.render()