The test binary fails to decode some well-formed base64-encoded strings

[ghost]

make
export j=""
for i in b a s e 6 4 t e s t; do
  j="$j$i"
  echo -n $j | /usr/bin/base64 | ./bin/base64 -d
  echo
done

Output:

b
ba
decoding error

base
base6
decoding error

base64t
base64te
decoding error

base64test

[aklomp]

That's because /usr/bin/base64 prints a trailing newline. Try this instead:

#!/bin/sh
export j=""
for i in b a s e 6 4 t e s t; do
  j="$j$i"
  echo -n $j | /usr/bin/base64 | tr -d "\n" | bin/base64 -d
  echo
done

Or /usr/bin/base64 -w0.