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From 2d8ef8a4ca613ad291bc05a4e5ebdc11c3eae6b9 Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Sat, 18 Nov 2017 12:01:34 +0000
Subject: [PATCH 19/23] Fixes for -safe-string in OCaml 4.06.

---
 src/top.ml | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/src/top.ml b/src/top.ml
index e2a93d6..d4f7697 100644
--- a/src/top.ml
+++ b/src/top.ml
@@ -296,17 +296,20 @@ let millisleep n =
  *)
 let get_string maxlen =
   ignore (echo ());
-  let str = String.create maxlen in
-  let ok = getstr str in (* Safe because binding calls getnstr. *)
+  let str = Bytes.create maxlen in
+  (* Safe because binding calls getnstr.  However the unsafe cast
+   * to string is required because ocaml-curses needs to be fixed.
+   *)
+  let ok = getstr (Obj.magic str) in
   ignore (noecho ());
   if not ok then ""
   else (
     (* Chop at first '\0'. *)
     try
-      let i = String.index str '\000' in
-      String.sub str 0 i
+      let i = Bytes.index str '\000' in
+      Bytes.sub_string str 0 i
     with
-      Not_found -> str (* it is full maxlen bytes *)
+      Not_found -> Bytes.to_string str (* it is full maxlen bytes *)
   )
 
 (* Main loop. *)
-- 
2.31.1