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From: Doug McIlroy <doug@cs.dartmouth.edu>
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Subject: Re: [TUHS] DEC Compilers (was: Re: SDB debugger
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>> Compile time was measured. My favorite "bug" was the
>> many minutes it took to compile a constant expression
>> that involved shifting a constant INT_MAX bits by
>> performing that many 1-bit shifts.
>
> I don't know if this anecdote is an urban legend or if it really
> happened.  I was told [a similar] story when I was interning as an operator
> at my alma mater, which was an IBM System/360 shop.

I heard it not from the grapevine, but from McKeeman himself.

Doug