Closed
Bug 576124
Opened 15 years ago
Closed 15 years ago
locally declared regexp keeps memory of position
Categories
(Core :: JavaScript Engine, defect)
Tracking
()
People
(Reporter: angelo.borsotti, Unassigned)
Details
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.6) Gecko/20100625 Firefox/3.6.6
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.6) Gecko/20100625 Firefox/3.6.6
A regexp that is declared as a local variable of a function
keeps memory of the lastIndex property between successive
executions of the function.
Reproducible: Always
Steps to Reproduce:
1.open the page:
<html>
<head>
<script type="text/javascript">
function f(s){
var reg = /[abc]/g;
document.write(reg.lastIndex + " ");
var test = reg.test(s);
document.write(test + " ");
}
f("a");
f("b");
</script>
</head>
</html>
2. note what the browser shows
Actual Results:
0 true 1 false
Expected Results:
0 true 0 true
The regexp is declared inside a function; thus it should be
created afresh and properly initialized each time the
function is called. Instead, it seems that it is reused
from one execution to the next without having properly
been initialized each time.
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Comment 1•15 years ago
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I get the expected results on trunk. This was an ES spec change, as I recall; the behavior we used to have was what the spec used to say.
Assignee: nobody → general
Component: General → JavaScript Engine
QA Contact: general → general
Whiteboard: DUPEME
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Updated•15 years ago
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Status: UNCONFIRMED → RESOLVED
Closed: 15 years ago
Resolution: --- → DUPLICATE
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Description
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