012 auto discharge none

✓ Passing This code compiles and runs correctly.

Code

// TEST: Auto-discharge with no consumer - MUST FAIL
// STATUS: PENDING IMPLEMENTATION
// MUST_FAIL: No disposal event found
//
// When no event consumes the obligation [!state], the compiler
// cannot auto-discharge and should error clearly.
//
// Here: open() returns *File[opened!] but NO event has [!opened]
// Compiler should error: "No disposal event found for [opened!]"
//
// This indicates a library bug - the library author forgot to
// provide a disposal event for the resource.

~import "$app/fs"

// This should FAIL - no way to dispose!
~app.fs:open(path: "test.txt")
| opened _ |> _

pub fn main() void {}

input.kz

Error Verification

Expected Error Pattern

MUST_FAIL

Actual Compiler Output

error[KORU030]: Resource '__type_ref' with phantom state [opened!] was not disposed. No event accepts [!opened!].
  --> auto_discharge:18:0

❌ Compiler coordination error: Auto-discharge failed (multiple disposal options or no disposal event)
error: CompilerCoordinationFailed
/Users/larsde/src/koru/tests/regression/300_ADVANCED_FEATURES/330_PHANTOM_TYPES/330_012_auto_discharge_none/backend.zig:9355:17: 0x1030764af in emit (backend)
                return error.CompilerCoordinationFailed;
                ^
/Users/larsde/src/koru/tests/regression/300_ADVANCED_FEATURES/330_PHANTOM_TYPES/330_012_auto_discharge_none/backend.zig:9439:28: 0x1030772b7 in main (backend)
    const generated_code = try RuntimeEmitter.emit(compile_allocator, final_ast);
                           ^

Imported Files

// Library module: fs
// NO disposal event defined - should error

const std = @import("std");

const File = struct { handle: i32 };

// Open a file - returns opened! state (requires cleanup)
~pub event open { path: []const u8 }
| opened *File[opened!]

~proc open {
    const f = std.heap.page_allocator.create(File) catch unreachable;
    f.* = File{ .handle = 42 };
    return .{ .opened = f };
}

// Oops! No close() or any event with [!opened] defined!
// This is a library bug - no way to satisfy the obligation

fs.kz

Test Configuration

MUST_FAIL

Expected Error:

No disposal event found

← 012 auto discharge explicit with multiple 013 auto discharge explicit ok →