From e8b181b9357159a4ac4806af6fd2bfc3b40779e0 Mon Sep 17 00:00:00 2001
From: Simon Hailes <btsimonh@googlemail.com>
Date: Mon, 14 Oct 2019 16:43:44 +0100
Subject: [PATCH 1/2] add clone.globalopts containing _clone.  If set, this is
 called with each item.  If it returns undefined, then the normal _clone
 continues.  If it returns something, this is used as the item being cloned.

---
 clone.js | 21 +++++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

diff --git a/clone.js b/clone.js
index 572ad87..4c60239 100644
--- a/clone.js
+++ b/clone.js
@@ -28,6 +28,10 @@ try {
   nativePromise = function() {};
 }
 
+var globalopts = {
+  _clone: null
+};
+
 /**
  * Clones (copies) an Object using deep copying.
  *
@@ -74,6 +78,13 @@ function clone(parent, circular, depth, prototype, includeNonEnumerable) {
     // cloning null always returns null
     if (parent === null)
       return null;
+    
+    if (globalopts._clone){
+      var result = globalopts._clone(parent, depth);
+      if (result !== undefined) {
+        return result;
+      }
+    }
 
     if (depth === 0)
       return parent;
@@ -160,9 +171,9 @@ function clone(parent, circular, depth, prototype, includeNonEnumerable) {
         var objProperty = Object.getOwnPropertyDescriptor(parent, i);
         if (objProperty.set === 'undefined') {
           // no setter defined. Skip cloning this property
-          continue;
-        }
-        child[i] = _clone(parent[i], depth - 1);
+        continue;
+      }
+      child[i] = _clone(parent[i], depth - 1);
       } catch(e){
         if (e instanceof TypeError) {
           // when in strict mode, TypeError will be thrown if child[i] property only has a getter
@@ -206,10 +217,12 @@ function clone(parent, circular, depth, prototype, includeNonEnumerable) {
 
     return child;
   }
-
+  
   return _clone(parent, depth);
 }
 
+clone.globalopts = globalopts;
+
 /**
  * Simple flat clone using prototype, accepts only objects, usefull for property
  * override on FLAT configuration object (no nested props).

From 440e6e2de96d19f01a867ac0ad9758a9d78729fd Mon Sep 17 00:00:00 2001
From: Simon Hailes <btsimonh@googlemail.com>
Date: Mon, 14 Oct 2019 17:50:39 +0100
Subject: [PATCH 2/2] Add protection against V8 crash by detecting [object
 Pipe].

---
 clone.js | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/clone.js b/clone.js
index 4c60239..b0ec358 100644
--- a/clone.js
+++ b/clone.js
@@ -29,9 +29,14 @@ try {
 }
 
 var globalopts = {
-  _clone: null
+  _clone: null,
+  
+  crash_types: {
+  '[object Pipe]': true,
+  }
 };
 
+
 /**
  * Clones (copies) an Object using deep copying.
  *
@@ -88,6 +93,11 @@ function clone(parent, circular, depth, prototype, includeNonEnumerable) {
 
     if (depth === 0)
       return parent;
+    
+    if (clone.__isCrash(parent)) {
+      // console.log("avoid crash on "+__objToStr(parent));
+      return parent;
+    }
 
     var child;
     var proto;
@@ -261,6 +271,12 @@ function __isRegExp(o) {
 }
 clone.__isRegExp = __isRegExp;
 
+function __isCrash(o) {
+  return typeof o === 'object' && globalopts.crash_types[__objToStr(o)];
+}
+clone.__isCrash = __isCrash;
+
+
 function __getRegExpFlags(re) {
   var flags = '';
   if (re.global) flags += 'g';