vim-patch:8.2.3659: integer overflow with large line number

Problem:    Integer overflow with large line number.
Solution:   Check for overflow. (closes vim/vim#9202)
https://github.com/vim/vim/commit/03725c5795ae5b8c14da4a39cd0ce723c6dd4304

Put E1247 in globals.h as E1240 is also there.
Do not make getdigits() abort.

1 files changed, 7 insertions, 10 deletions

diff --git a/src/nvim/normal.c b/src/nvim/normal.c
index 21c465434a..a50f85dc7a 100644
--- a/src/nvim/normal.c
+++ b/src/nvim/normal.c
@@ -824,15 +824,12 @@ static bool normal_get_command_count(NormalState *s)
     if (s->c == K_DEL || s->c == K_KDEL) {
       s->ca.count0 /= 10;
       del_from_showcmd(4);            // delete the digit and ~@%
+    } else if (s->ca.count0 >= 999999999L) {
+      s->ca.count0 = 999999999L;
     } else {
       s->ca.count0 = s->ca.count0 * 10 + (s->c - '0');
     }
 
-    if (s->ca.count0 < 0) {
-      // overflow
-      s->ca.count0 = 999999999L;
-    }
-
     // Set v:count here, when called from main() and not a stuffed
     // command, so that v:count can be used in an expression mapping
     // right after the count. Do set it for redo.
@@ -1046,14 +1043,14 @@ static int normal_execute(VimState *state, int key)
     // If you give a count before AND after the operator, they are
     // multiplied.
     if (s->ca.count0) {
-      s->ca.count0 = (long)((uint64_t)s->ca.count0 * (uint64_t)s->ca.opcount);
+      if (s->ca.opcount >= 999999999L / s->ca.count0) {
+        s->ca.count0 = 999999999L;
+      } else {
+        s->ca.count0 *= s->ca.opcount;
+      }
     } else {
       s->ca.count0 = s->ca.opcount;
     }
-    if (s->ca.count0 < 0) {
-      // overflow
-      s->ca.count0 = 999999999L;
-    }
   }
 
   // Always remember the count.  It will be set to zero (on the next call,