sed in bb 1.16.1 broken

[Timo Teräs]

Hi,

I was fighting one autoconf test that fails, and turns out it's a bb sed problem.

The failing autoconf test is attached.

It gets executed like:
  ./breakage-sed2.sh gethostbyaddr < breakage-protos.h

And is supposed to output (gnu sed output):
  const void

But BB sed dumps out:
  char *
  char *  

I tested this with git master, 1.16.1, and various older random tags including 1.6.0 etc.
And all seemed to give wrong output.

Any idea what goes wrong?

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