--------
Brooks Davis writes:

> FWIW, I found it useful that we made SYSERRCAUSE take a format string.
> When debugging complicated mmap usage errors, [...]

The main problem with format strings is that then we need memory
(pre-)allocation.

My proposal gives up that level of precision in favor of simplicity
and minimum performance impact.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
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Never attribute to malice what can adequately be explained by incompetence.

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