lexer: Ensure byte is not EOF

Signed-off-by: Ian M. <ian@aptel.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/core/lexer.c b/core/lexer.c
index 019724c..53a418d 100644
--- a/core/lexer.c
+++ b/core/lexer.c
@@ -45,7 +45,10 @@ lexer_scan_byte(struct atas_state *state, bool skip_ws)
         return '\0';
     }
 
-    c = fgetc(state->in_file);
+    if ((c = fgetc(state->in_file)) == EOF) {
+        return '\0';
+    }
+
     while (lexer_is_ws(c) && skip_ws) {
         if ((c = fgetc(state->in_file)) == EOF) {
             return '\0';