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bug#9612: sort: avoid a NaN-induced infloop

From: Jim Meyering
Subject: bug#9612: sort: avoid a NaN-induced infloop
Date: Sat, 01 Oct 2011 19:41:53 +0200

Jim Meyering wrote:
> Who would have thought that including a few NaNs in the input to sort
> would make it infloop.
> The original failure arose only when sort was reading from a pipe:
>     yes -- -nan | head -156903 | sort -g > /dev/null
> But it's not always easy to reproduce.
> [ I'm about to file the glibc bug

I've done that:

  RFE: strtold: do not include uninitialized bytes when converting "NaN"

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