From 2e4404ca7eb9b79b5b0e5de72ec9db339e6cbe11 Mon Sep 17 00:00:00 2001
From: Patrick Pelissier <patrick.pelissier@gmail.com>
Date: Sun, 22 Nov 2020 23:20:04 +0100
Subject: [PATCH] Fix a (strange) warning for gcc 8 without assertions. Add
 back the assertions as compile hints.

---
 m-string.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/m-string.h b/m-string.h
index 7004c530..b4f61633 100644
--- a/m-string.h
+++ b/m-string.h
@@ -764,6 +764,7 @@ string_replace_at (string_t v, size_t pos, size_t len, const char str2[])
     M_ASSERT_INDEX (str1_l, size + str2_l + 1);
     ptr = stringi_fit2size (v, size + str2_l - str1_l + 1);
     M_ASSERT_INDEX (pos + str1_l, size + 1);
+    M_ASSUME (pos + str1_l < size + 1);
     memmove(&ptr[pos+str2_l], &ptr[pos+str1_l], size - pos - str1_l + 1);
     stringi_set_size(v, size + str2_l - str1_l);
   } else {