From 41beb477c5744bc396fa1162ee0c14218ec12213 Mon Sep 17 00:00:00 2001

From: Mark Adler <madler@alumni.caltech.edu>

Date: Mon, 27 May 2019 08:20:32 -0700

Subject: [PATCH] Fix bug in undefer_input() that misplaced the input state.

---

 fileio.c | 4 +++-

 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fileio.c b/fileio.c

index c042987..bc00d74 100644

--- a/fileio.c

+++ b/fileio.c

@@ -530,8 +530,10 @@ void undefer_input(__G)

          * This condition was checked when G.incnt_leftover was set > 0 in

          * defer_leftover_input(), and it is NOT allowed to touch G.csize

          * before calling undefer_input() when (G.incnt_leftover > 0)

-         * (single exception: see read_byte()'s  "G.csize <= 0" handling) !!

+         * (single exception: see readbyte()'s  "G.csize <= 0" handling) !!

          */

+        if (G.csize < 0L)

+            G.csize = 0L;

         G.incnt = G.incnt_leftover + (int)G.csize;

         G.inptr = G.inptr_leftover - (int)G.csize;

         G.incnt_leftover = 0;