I believe I traced the problem down to line 380 in my version of Storable.pm (2.18): 
    eval { $self = pretrieve(*FILE) };

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which based on the comments in the file is a call to a C routine.

I found other issues, such as that the taint checking does not always seem to work correctly, and variables are considered tainted under the debugger even when they are properly untainted (and they are not considered tainted when the code is run without the debugger).

In reply to Re^2: Debugger problem in 5.10 (replace) by duoxi
in thread Debugger problem in 5.10 by duoxi

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