Hi Tal
This might already have been solved in 9, and backported to 8u60, with
bug JDK-8067139 [1]: Finally blocks inlined incorrectly
Kind regards,
Anthony
[1] https://bugs.openjdk.java.net/browse/JDK-8067139
On 8/03/2015 14:55, Tal Liron wrote:
This was very hard to discover, but it is real and easy to reproduce.
Try running this program:
var finalies = 1
var line = 'TEST THIS LINE'
try {
while ('' !== (line = line.substring(0, line.length - 1))) {
if (line.length % 2 == 0) {
continue
}
java.lang.System.out.println(line)
}
}
catch (x) {
java.lang.System.out.println(x)
}
finally {
java.lang.System.out.println('Finalies ' + (finalies++))
}
If you run this code, you'll see that the "finally" block is run every
time "continue" is reached, and then the while loop continues after
the "finally" block is run. Of course, the "finally" block should only
be called once in this example, and the while loop should not
continue, and this broken behavior can lead to serious problems.
(I added the "catch" block only to make sure that exceptions are not
thrown, and indeed they are not. Sorry about the silly functionality
of the program, but it's the result of trying to wrap my head around
what was going on...)
Or maybe I'm crazy and am missing something trivial? The same code
runs in Rhino without this problem.
The bug appears in the 8u40 release. :(
-Tal
