007 use after disposal

✓ Passing This code compiles and runs correctly.

Code

~import "$app/fs"
~app.fs:open(path: "test.txt")
| opened f |> app.fs:close(file: f) |> app.fs:use_file(file: f)  // ERROR: f was disposed!
input.kz

Error Verification

Expected Error Pattern

Backend should fail - no disposal event available or multiple disposal options

Actual Compiler Output 

error[KORU030]: Use-after-disposal: binding 'f' was already disposed and cannot be used
  --> phantom_semantic_check:3:0

❌ Compiler coordination error: Phantom semantic validation failed
error: CompilerCoordinationFailed
/Users/larsde/src/koru/tests/regression/300_ADVANCED_FEATURES/330_PHANTOM_TYPES/330_007_use_after_disposal/backend.zig:9437:17: 0x10411e4af in emit (backend)
                return error.CompilerCoordinationFailed;
                ^
/Users/larsde/src/koru/tests/regression/300_ADVANCED_FEATURES/330_PHANTOM_TYPES/330_007_use_after_disposal/backend.zig:9521:28: 0x10411f2b7 in main (backend)
    const generated_code = try RuntimeEmitter.emit(compile_allocator, final_ast);
                           ^

Imported Files

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

~pub event open { path: []const u8 }
| opened *File[opened!]

~proc open {
    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 .{ .opened = f };
}

~pub event close { file: *File[!opened] }  // Consumes obligation

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

~pub event use_file { file: *File[opened] }  // Expects opened file

~proc use_file {
    std.debug.print("Using file\n", .{});
}
fs.kz

Test Configuration

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