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Ask questionsTypeError: instanceof called on an object with an invalid prototype property.

This happens when axios receives an error response from server. I only encounter this on iOS. LiquidCore on android is able to handle the error response with no issue.

Error Log:

TypeError: instanceof called on an object with an invalid prototype property. Assertion failed: (exception==0), function exec, file /Users/ctee/Documents/pf-ios/1/Pods/LiquidCore/LiquidCore/src/ios/V82JSC/V82JSC.h, line 286.

Xcode stacktrace:

#0 0x00000001bc0b995c in __pthread_kill () #1 0x00000001d68fb9e8 in pthread_kill () #2 0x000000019ac52934 in abort () #3 0x000000019ac51d34 in assert_rtn () #4 0x0000000101c4dd3c in V82JSC::exec(OpaqueJSContext const*, char const*, int, OpaqueJSValue const* const*, OpaqueJSValue const**) at /Users/ctee/Documents/pf-ios/1/Pods/LiquidCore/LiquidCore/src/ios/V82JSC/V82JSC.h:286 #5 0x0000000102319130 in is(v8::Value const*, char const*) at /Users/ctee/Documents/pf-ios/1/Pods/LiquidCore/LiquidCore/src/ios/V82JSC/Value.cpp:27 #6 0x0000000102319ff8 in v8::Value::IsBigIntObject() const at /Users/ctee/Documents/pf-ios/1/Pods/LiquidCore/LiquidCore/src/ios/V82JSC/Value.cpp:399 #7 0x00000001020f8a5c in node::(anonymous namespace)::IsBoxedPrimitive(v8::FunctionCallbackInfov8::Value const&) at /Users/ctee/Documents/pf-ios/1/Pods/LiquidCore/deps/node-10.15.3/src/node_types.cc:59 #8 0x000000010228f440 in OpaqueJSValue const* callAsCallback<OpaqueJSValue const*>(OpaqueJSContext const*, OpaqueJSValue*, OpaqueJSValue*, unsigned long, OpaqueJSValue const* const*, OpaqueJSValue const**) at /Users/ctee/Documents/pf-ios/1/Pods/LiquidCore/LiquidCore/src/ios/V82JSC/Template.cpp:249 #9 0x000000010228ec08 in V82JSC::Template::callAsFunctionCallback(OpaqueJSContext const*, OpaqueJSValue*, OpaqueJSValue*, unsigned long, OpaqueJSValue const* const*, OpaqueJSValue const**) at /Users/ctee/Documents/pf-ios/1/Pods/LiquidCore/LiquidCore/src/ios/V82JSC/Template.cpp:281

instanceof being referred from this line in Value.ccp: IS(IsBigIntObject, "return _1 && typeof _1 === 'object' && (typeof Object.prototype.valueOf(_1) === 'bigint' || Object.prototype.valueOf(_1) instanceof BigInt.proto)")

LiquidPlayer/LiquidCore

Answer questions ericwlange

It looks like BigInt has been added to JavaScriptCore in iOS 14:

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/BigInt (see compatibility table -- added in Safari for iOS 14) https://developer.apple.com/documentation/safari-release-notes/safari-14-beta-release-notes (Safari 14 releases with iOS 14)

So this may be an iOS 14-only problem, in that there is a native implementation and that native implementation does not have a prototype.

If so, that line of code needs to change somehow. Not sure how just yet.

useful!

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