301698 - anonymous javascript function causes a syntax error / FFX >= 1.0.5 Mozilla >= 1.7.10

Status: RESOLVED DUPLICATE of bug 301693

(Firefox :: General, defect)

Description

[jens]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.10) Gecko/20050716 Firefox/1.0.6
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.10) Gecko/20050716 Firefox/1.0.6

The following three lines of javscript code caused no issues in earlier releases 

new Function("", "alert(1);");
function() { alert(1); }
7;

Since FFX 1.0.5 and Mozilla 1.7.10 line number 2 causes a javascript syntax error. 
Question 1) Why? OK, it doesn't make sense because there is no context but IMHO
the syntax is correct. that's why I think Javascript Console should show a
Warning instead of a Error. 
Question 2) Why is line 1 still working?


Reproducible: Always

Comment 1

[Erik Fabert]

Why shouldn't line 1 work? Throwing away the result of an expression isn't 
forbidden.

*** This bug has been marked as a duplicate of 301693 ***

Comment 2

[jens]

Yeah - completely understandable...
...but "function() { alert(1); }" could be either a FunctionDeclaration or a
FunctionExpression (ECMA 262 chapter 13) and as you just said: "Throwing away
the result of an expression isn't forbidden" ;)