zig

commit 6fa7d5d4ad02f9694bfabf0ef42f65236c02d1ef (tree)
parent c0448a6c7c6a544ddfabd1a42c9dc42b47649fa8
Author: andrewkraevskii <andrew.kraevskii@gmail.com>
Date:   Mon, 10 Feb 2025 02:26:52 +0300

std.mem: add missing check to lastIndexOfLinear

Diffstat:
M
lib/std/mem.zig
 | 
1
+

1 file changed, 1 insertion(+), 0 deletions(-)
diff --git a/lib/std/mem.zig b/lib/std/mem.zig
@@ -1396,6 +1396,7 @@ pub fn indexOf(comptime T: type, haystack: []const T, needle: []const T) ?usize 
 /// Consider using `lastIndexOf` instead of this, which will automatically use a
 /// more sophisticated algorithm on larger inputs.
 pub fn lastIndexOfLinear(comptime T: type, haystack: []const T, needle: []const T) ?usize {
+    if (needle.len > haystack.len) return null;
     var i: usize = haystack.len - needle.len;
     while (true) : (i -= 1) {
         if (mem.eql(T, haystack[i..][0..needle.len], needle)) return i;