1197122 - Direct eval creates variables before checking for undefinable functions

Status: RESOLVED FIXED

(Core :: JavaScript Engine, defect)

Description

[André Bargull [:anba]]

Test case:
---
try {
  eval("var vn = 0; function NaN(){}")
  print("no error");
} catch (e) {
  print("caught", e);
}

print(JSON.stringify(Object.getOwnPropertyDescriptor(this, "vn")));
---

Expected: Throws TypeError and property "vn" is not created on global
Actual: Throws TypeError and property "vn" is created on global


ES5: 10.5, steps 5 and 8
ES6: 18.2.1.2, steps 8 and 15


Note: ES6 changed the error from TypeError to SyntaxError, but I guess this is a spec bug (for example compare to 15.1.8, steps 10 & 12).

Comment 1

[Shu-yu Guo [:shu]]

This has been fixed in the meantime. NIing to check in test.

Comment 2

[Shu-yu Guo [:shu]]

Pending a stupid bug in bug 1300521, this has been fixed.