Can't free sentinel terminated many item pointer

[Sze]

defer allocator.free(std.mem.span(str));

free needs a slice, also take a look at:

Convert []const u8 to [*:0]const u8

Hello @jjuel, welcome to the forum. Types: [*:0]const u8 is a sentinel terminated pointer, a pointer to 0 terminated string of u8. []const u8 is a slice, a pointer and a length. [:0]const u8 is a 0 terminated sentinel slice, a pointer to 0 terminated string and a length. Convertions: To convert from a zero terminated pointer to a slice use: std.mem.span . To convert from a 0 terminated sentinel slice to a zero terminated pointer call .ptr // "Hello" is a zero terminated array of u8 const …