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Date: Tue, 6 Sep 2022 12:12:48 +0200
From: Gabriel Ravier <>
Subject: ecvt(0, 0, ...) is broken

Executing ecvt(0, 0, &decpt, &sign) results in musl returning 

This seems highly likely to be a bug considering that glibc returns "" 
and I see no plausible reasoning for musl's behavior that could be 
justified by the standard.

This seems to be caused by musl's ecvt containing this line of code:

if (n-1U > 15) n = 15;

which I would assume was not intended to match n == 0.

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