[Pharo-project] A possible bug in GZip streams

Hi, I get a SubscriptOutOfBounds error when I evaluate: | aStream zipStream | aStream := ByteArray new writeStream binary. zipStream := GZipWriteStream on: aStream. zipStream nextStringPut: ''. zipStream nextStringPut: ''. zipStream close. aStream close. aStream := aStream contents readStream binary. zipStream := GZipReadStream on: aStream. zipStream nextString. zipStream nextString. zipStream close. aStream close. The error doesn't happen when I put just one string (instead of two). Do you see something wrong in the code? Should I report a bug? Thanks, Martín