Tom Lane wrote:
> It's too bad that gcc doesn't have a
> -Wno-snarkiness-about-system-headers-thank-you switch.

It does have a switch to *add* snarkiness about system headers, but does 
not do it by default.

The problem in this case is that an uncast null pointer constant is not 
always a sufficient sentinel for variadic functions, as explained here: 

Peter Eisentraut

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