(readline): Terminate buffer properly when EOF seen.

Test for valid pointer before dereferencing it.

1 files changed, 2 insertions, 1 deletions

diff --git a/lib-src/b2m.c b/lib-src/b2m.c
index 88d0acd5cd8..2eb6a0354b8 100644
--- a/lib-src/b2m.c
+++ b/lib-src/b2m.c
@@ -211,12 +211,13 @@ readline (linebuffer, stream)
         }
       if (c == EOF)
         {
+          *p = '\0';
           chars_deleted = 0;
           break;
         }
       if (c == '\n')
         {
-          if (p[-1] == '\r' && p > buffer)
+          if (p > buffer && p[-1] == '\r')
             {
               *--p = '\0';
               chars_deleted = 2;