Bug 247497 – Access of import in LHS throws unexpected `SyntaxError`

• Component: JavaScriptCore
• Status: RESOLVED FIXED

[Kanguk Lee]

// input.js ( file.js exists in current directory)
import ( "file" + ".js" ) [ 0 ] = 0 ;
// Note: this is fine
// import ( "file.js" ) [ 0 ] = 0 ;
_____________________

Hello,

Executing the input.js using JSC throws SyntaxError, but it is expected to be terminated normally.

This bug looks similar to the bug I found yesterday: https://bugs.webkit.org/show_bug.cgi?id=247435.

However, I personally think this may not be a duplicate of Bug 247435, so please let me know if this bug is duplicated or not.

Running the input.js with JSC results in:

---
$ jsc input.js
Exception: SyntaxError: Left hand side of operator '=' must be a reference.
at input.js:1
---

while other engines behave like:

---
# V8
$ node input.js
// no error

# GraalJS
$ js input.js
// no error
---


WebKit version: 615.1.10

[Radar WebKit Bug Importer]

<rdar://problem/102064736>

[Yusuke Suzuki]

Pull request: https://github.com/WebKit/WebKit/pull/6240

[EWS]

Committed 256470@main (90b95a3284a6): <https://commits.webkit.org/256470@main>

Reviewed commits have been landed. Closing PR #6240 and removing active labels.