On Tue, 27 Jan 2009, Johannes Schindelin wrote:
>
> To help ye Gods, I put together this almost minimal C program:
This one is buggy.
> out = fopen("/dev/null", "w");
> fwrite(compressed + 51, 51, 1, out);
> fwrite(compressed + 51, 1, 1, stderr);
> fflush(out);
> fclose(out);
The problem is that the first argument to that first "fwrite()" is simply
wrong. It shouldn't be "compressed + 51", it should be just "compressed".
As it is, you're writing 51 bytes, starting at 51 bytes in, and that's
obviously not correct (you only got 58 bytes from deflate()).
So valgrind does complain about it, but for a perfectly valid reason.
So I think your minimal C program isn't actually showing what you wanted
to show, and isn't showing the behaviour you see in git.
Linus
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