Add "proxy-missing-checks" feature tag (#2195)

features.txt

@@ -7,6 +7,10 @@
 #
 # https://github.com/tc39/process-document
 
+# Missing checks in Proxy internal methods
+# https://github.com/tc39/ecma262/pull/666
+proxy-missing-checks
+
 # Promise.allSettled
 # https://github.com/tc39/proposal-promise-allSettled
 Promise.allSettled

test/built-ins/Proxy/defineProperty/targetdesc-not-configurable-writable-desc-not-writable.js

@@ -16,7 +16,7 @@ info: |
             i. If Desc has a [[Writable]] field and Desc.[[Writable]] is
             false, throw a TypeError exception.
     ...
-features: [Proxy, Reflect]
+features: [Proxy, Reflect, proxy-missing-checks]
 ---*/
 
 var trapCalls = 0;

test/built-ins/Proxy/deleteProperty/targetdesc-is-configurable-target-is-not-extensible.js

@@ -12,7 +12,7 @@ info: |
     13. Let extensibleTarget be ? IsExtensible(target).
     14. If extensibleTarget is false, throw a TypeError exception.
     ...
-features: [Proxy, Reflect]
+features: [Proxy, Reflect, proxy-missing-checks]
 ---*/
 
 var trapCalls = 0;

test/built-ins/Proxy/getOwnPropertyDescriptor/resultdesc-is-not-configurable-not-writable-targetdesc-is-writable.js

@@ -15,7 +15,7 @@ info: |
         false, then
             i. If targetDesc.[[Writable]] is true, throw a TypeError exception.
     ...
-features: [Proxy]
+features: [Proxy, proxy-missing-checks]
 ---*/
 
 var trapCalls = 0;