007 use after disposal

✓ Passing Passing: the compiler rejects this program as expected.

Code

import app/fs
app/fs:open(path: "test.txt"): f |> app/fs:close(file: f) |> app/fs:use-file(file: f)  // ERROR: f was disposed!

input.k

Supporting Files

const std = @import("std");
const File = struct { handle: i32 };

~pub tor open { path: string } -> *File<opened!>

~proc open|zig {
    std.debug.print("Opening file: {s}\n", .{path});
    const allocator = std.heap.page_allocator;
    const f = allocator.create(File) catch unreachable;
    f.* = File{ .handle = 42 };
    return f;
}

~pub tor close { file: *File<!opened> }  // Consumes obligation

~proc close|zig {
    std.debug.print("Closing file\n", .{});
}

~pub tor use-file { file: *File<opened> }  // Expects opened file

~proc use-file|zig {
    std.debug.print("Using file\n", .{});
}

fs.kz

Actual compiler output

error[KORU030]: Use-after-discharge: binding 'f' was already discharged and cannot be used
  --> tests/regression/300_ADVANCED_FEATURES/330_PHANTOM_TYPES/330_007_use_after_disposal/input.k:2:0

❌ Compiler coordination error: Phantom semantic validation failed
   (set KORU_BACKEND_TRACE=1 for the backend return trace)

Must contain:

Use-after-discharge

Flows

flow ~open click a branch to expand · @labels scroll to their anchor

open (path: "test.txt")

Test Configuration

MUST_ERROR

← 006 cleanup consumed by disposal 008 obligation escapes via interface →