7-zip's truncated stdout stream

[CiVQ]

Hello,

I am tinkering with the 7-zip command line tool, feeding the app by StdinWrite(),

and getting its output by StdoutRead().

It uncompresses the data without error on both cases.

The symptom is a truncated list of processed files (the stdout stream).

The problem occurs, when 7-zip is being fed through the stdin stream.

But by normal invoking (filename in the command line), it spits out its stdout stream normally.

So, the big question is: am I missing something very basic, or this is a bug, or software incompatibility, or what?

Thx in advance.

test.zip