Guys, I have encountered the same problem, both in Padre and in EPIC on Eclipse. To put in succinctly: when single-stepping through a "while - each -hash" loop:

while ( ($key, $value) = each %hash ) {
print "$key => $value\n";
}
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the debugger gets into an infinite loop, and does not advance the iterator. I found out that this problem has been already mentioned here (in 2006): using-each-hash-debug

Has anyone found a fix? I am researching it.