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Date: Tue, 26 Jul 2016 15:25:40 -0700
From: Jacob Abrams <>
Subject: vprintf.c bug

I believe there is a small bug in vfprintf.c

I had to change the if statement from

    ret = printf_core(f, fmt, &ap2, nl_arg, nl_type);
    if (saved_buf) {


    ret = printf_core(f, fmt, &ap2, nl_arg, nl_type);
    if (f->buf == internal_buf) {

Because the saved_buf may be NULL which will result the internal
buffer being used but the file not being reset properly after the call
to printf_core. This was discovered while using MUSL v1.1.4 on an OS
other than Linux.

Please cc-me on any response.


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