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-rw-r--r--src/stdio/vfprintf.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/stdio/vfprintf.c b/src/stdio/vfprintf.c
index 928c8c16..91c6b93a 100644
--- a/src/stdio/vfprintf.c
+++ b/src/stdio/vfprintf.c
@@ -652,8 +652,9 @@ int vfprintf(FILE *f, const char *fmt, va_list ap)
FLOCK(f);
if (!f->buf_size) {
saved_buf = f->buf;
- f->buf = internal_buf;
+ f->wpos = f->wbase = f->buf = internal_buf;
f->buf_size = sizeof internal_buf;
+ f->wend = internal_buf + sizeof internal_buf;
}
ret = printf_core(f, fmt, &ap2, nl_arg, nl_type);
if (saved_buf) {