Add behavior test: including the sentinel when dereferencing a string literal

This test would have failed in the past, but this has been fixed sometime in the last year. Closes #15944

1 files changed, 11 insertions, 0 deletions

diff --git a/test/behavior/string_literals.zig b/test/behavior/string_literals.zig
index 898de2167c..a45403af97 100644
--- a/test/behavior/string_literals.zig
+++ b/test/behavior/string_literals.zig
@@ -101,3 +101,14 @@ test "Peer type resolution with string literals and unknown length u8 pointers"
     try std.testing.expect(@TypeOf("", "a", @as([*:0]const u8, "")) == [*:0]const u8);
     try std.testing.expect(@TypeOf(@as([*:0]const u8, "baz"), "foo", "bar") == [*:0]const u8);
 }
+
+test "including the sentinel when dereferencing a string literal" {
+    var var_str = "abc";
+    const var_derefed = var_str[0 .. var_str.len + 1].*;
+
+    const const_str = "abc";
+    const const_derefed = const_str[0 .. const_str.len + 1].*;
+
+    try std.testing.expectEqualSlices(u8, &var_derefed, &const_derefed);
+    try std.testing.expectEqual(0, const_derefed[3]);
+}