[Webkit-unassigned] [Bug 247434] New: Invalid call chained with optional access

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=247434

            Bug ID: 247434
           Summary: Invalid call chained with optional access
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: p51lee at kaist.ac.kr

// input.js
( { } . x ( ) ?. x ) ;
__________________

Hello,

Executing the input.js using JSC, it is terminated normally.
However, it is expected to throw TypeError since `{ } . x` is not a function.

Running the input.js with JSC gives

---
$ jsc input.js
// no error
---

while other engines behave like

---
# V8
$ node input.js
input.js:1: TypeError: {}.x is not a function
( { } . x ( ) ?. x ) ;
        ^
TypeError: {}.x is not a function
    at input.js:1:9

# GraalJS
$ js input.js
TypeError: (intermediate value).x is not a function
        at <js> :program(input.js:1:2-12)
---


WebKit version: 615.1.10

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