isNil => a$nil

bower.json

@@ -26,7 +26,7 @@
   ],
   "private": false,
   "dependencies": {
-    "amber": ">=0.15.0",
+    "amber": ">0.18.5",
     "domite": "^0.4.0 || ^0.5.0 || ^0.6.0"
   },
   "devDependencies": {

src/Silk-Tests.js

@@ -131,7 +131,7 @@ return err;
 //>>excludeEnd("ctx");
 }));
 $4=err;
-if(($receiver = $4) == null || $receiver.isNil){
+if(($receiver = $4) == null || $receiver.a$nil){
 $4;
 } else {
 $recv(err)._signal();

src/Silk.js

@@ -21,7 +21,7 @@ return $core.withContext(function($ctx1) {
 //>>excludeEnd("ctx");
 var $1,$2,$receiver;
 $1=$recv(self._class())._tryMakeDnuElement_(aMessage);
-if(($receiver = $1) == null || $receiver.isNil){
+if(($receiver = $1) == null || $receiver.a$nil){
 $2=(
 //>>excludeStart("ctx", pragmas.excludeDebugContexts);
 $ctx1.supercall = true,
@@ -62,7 +62,7 @@ return $core.withContext(function($ctx1) {
 //>>excludeEnd("ctx");
 var $1,$receiver;
 $1=$recv(anObject)._renderOnSilk_(self);
-if(($receiver = $1) == null || $receiver.isNil){
+if(($receiver = $1) == null || $receiver.a$nil){
 (
 //>>excludeStart("ctx", pragmas.excludeDebugContexts);
 $ctx1.supercall = true,
@@ -100,7 +100,7 @@ return $core.withContext(function($ctx1) {
 //>>excludeEnd("ctx");
 var $1,$receiver;
 $1=self._tryMakeDnuElement_(aMessage);
-if(($receiver = $1) == null || $receiver.isNil){
+if(($receiver = $1) == null || $receiver.a$nil){
 return (
 //>>excludeStart("ctx", pragmas.excludeDebugContexts);
 $ctx1.supercall = true,