From 64948fa7015874e35338924644cadbcd1abc6986 Mon Sep 17 00:00:00 2001
From: Andreas Kling <awesomekling@gmail.com>
Date: Sun, 22 Sep 2019 19:51:39 +0200
Subject: [PATCH] LibC: ungetc(EOF) should fail (and return EOF)

---
 Libraries/LibC/stdio.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Libraries/LibC/stdio.cpp b/Libraries/LibC/stdio.cpp
index bce13c7f79..db3dc57451 100644
--- a/Libraries/LibC/stdio.cpp
+++ b/Libraries/LibC/stdio.cpp
@@ -190,6 +190,8 @@ ssize_t getline(char **lineptr, size_t *n, FILE *stream)
 int ungetc(int c, FILE* stream)
 {
     ASSERT(stream);
+    if (c == EOF)
+        return EOF;
     if (stream->have_ungotten)
         return EOF;
     stream->have_ungotten = true;