Add error logging if Node.log throws an error

Part of #3327

packages/node_modules/@node-red/runtime/lib/nodes/Node.js

@@ -487,7 +487,6 @@ function log_helper(self, level, msg) {
         level: level,
         id: self.id,
         type: self.type,
-        module: self._module,
         msg: msg
     };
     if (self._alias) {
@@ -500,7 +499,12 @@ function log_helper(self, level, msg) {
     if (self.name) {
         o.name = self.name;
     }
+    // See https://github.com/node-red/node-red/issues/3327
+    try {
         self._flow.log(o);
+    } catch(err) {
+        logUnexpectedError(self, err)
+    }
 }
 /**
  * Log an INFO level message
@@ -580,4 +584,59 @@ Node.prototype.status = function(status) {
     this._flow.handleStatus(this,status);
 };
 
+
+function inspectObject(flow) {
+    try {
+        let properties = new Set()
+        let currentObj = flow
+        do {
+            if (!Object.getPrototypeOf(currentObj)) { break }
+            Object.getOwnPropertyNames(currentObj).map(item => properties.add(item))
+        } while ((currentObj = Object.getPrototypeOf(currentObj)))
+        let propList = [...properties.keys()].map(item => `${item}[${(typeof flow[item])[0]}]`)
+        propList.sort();
+        let result = [];
+        let line = "";
+        while (propList.length > 0) {
+            let prop = propList.shift()
+            if (line.length+prop.length > 80) {
+                result.push(line)
+                line = "";
+            } else {
+                line += " "+prop
+            }
+        }
+        if (line.length > 0) {
+            result.push(line);
+        }
+        return result.join("\n  ")
+
+    } catch(err) {
+        return "Failed to capture object properties: "+err.toString()
+    }
+}
+
+function logUnexpectedError(node, error) {
+    let moduleInfo = node._module?`${node._module.module}@${node._module.version}`:"undefined"
+    Log.error(`
+********************************************************************
+Unexpected Node Error
+${error.stack}
+Node:
+ Type: ${node.type}
+ Module: ${moduleInfo}
+ ID: ${node._alias||node.id}
+ Properties:
+  ${inspectObject(node)}
+Flow: ${node._flow?node._flow.path:'undefined'}
+ Type: ${node._flow?node._flow.TYPE:'undefined'}
+ Properties:
+  ${node._flow?inspectObject(node._flow):'undefined'}
+
+Please report this issue, including the information logged above:
+https://github.com/node-red/node-red/issues/
+********************************************************************
+`)
+}
+
 module.exports = Node;