Why compiler did not detect leak

[AndrewCodeDev]

For more context, please refer to these threads:

Over-Allocation with the Page Allocator

The Zig standard library has a variety of useful memory allocators, each carefully designed to address a specific need by employing a specific allocation strategy. The Language Reference has an excellent section on choosing an allocator, which is highly recommended as your go-to reference for this crucial step in Zig software development. One of these allocators is the page allocator (std.heap.page_allocator), which is often used as a backing-allocator for other higher-level allocators. The pag…

No default safety with allocators?

Hello Enjoying Zig for a few days now, love it so far, but have a question regarding allocators. Using v0.12.0 on osx and Ubuntu. Reading through the docs and going through the zig guide to get started I noticed that most examples use the page_allocator by default and the testing allocator for tests. I also read that one should run without optimizations while developing to get full safety by default and be notified when I forget to deinit() or free() for example. Now I noticed that when…

Also, you may want to consider looking at functions in the standard library:

std.ascii.toLower

/// Lowercases the character and returns it as-is if already lowercase or not a letter.
pub fn toLower(c: u8) u8 {
    const mask = @as(u8, @intFromBool(isUpper(c))) << 5;
    return c | mask;
}