g77 needs an option to initialize everything (not otherwise
explicitly initialized) to "weird"
(machine-dependent) values, e.g. NaNs, bad (non-NULL) pointers, and
largest-magnitude integers, would help track down references to
some kinds of uninitialized variables at run time.
Note that use of the options `-O -Wuninitialized' can catch many such bugs at compile time.
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