Data_Error - GNAT -O3 problem

[arthurw@bigfoot.com]

I've found another troublesome quirk in GNAT's -O3 mode -- Data_Errors are no
longer propagated by the Text_Io packages (it worked fine without
optimization). This is quite disturbing, to say the least, since it clobbers
my attempt to catch bad input data formatting before calculating with it. :-(
 Is anyone else familiar with this phenomenon, or did I miss some fine print
somewhere?

Also, I posted before about another -O3 problem, but haven't seen any
response on the issue (maybe it's that bad of a problem :) . -O3 generates a
Program_Error when a procedure that was supplied with an access to procedure
parameter tries to pass that access to procedure parameter to another
procedure. Is there a trick to this that non-optimized mode doesn't require?
I found that using -O1 caused the program to get stuck and hang (CPU usage at
100% doing nothing).

Any help on these issues would be appreciated!

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