005 nested loop inner discharges outer

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

Code

// PIN: outermost resource discharged inside the INNER loop body.
// The obligation crosses two @scope boundaries (outer loop, inner loop).
// Discharging it in the innermost ! each is doubly wrong.
// Austral rule: "a linear value defined outside a loop cannot appear in the loop body."
//
// Grounding:
//   Legal nested-for form: 330_032_nested_for_scopes/input.kz:3-9
//     outermost_f is closed in the OUTER | done, not any each body
//   for + each + done nesting syntax: 330_032_nested_for_scopes/input.kz:4-9
//   KORU032 message: "Cannot discharge outer-scope resource inside @scope boundary"
import std/control
import app/fs
app/fs:open(path: "outermost.txt"): outermost_f |> for(0..2)
    ! each _ |> for(0..2)
        ! each _ |> app/fs:close(file: outermost_f)  // ERROR: two @scope layers deep
        | done |> _
    | done |> _

input.k

Supporting Files

// Library module: fs
// Defines filesystem operations with cleanup obligations

const std = @import("std");

// File type with phantom states
const File = struct {
    handle: i32,
};

// Open a file - returns opened! state (requires cleanup)
~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;
}

// Close a file - CONSUMES opened! state (disposes the resource)
~pub tor close { file: *File<!opened> }

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

fs.kz

Actual compiler output

error[KORU032]: Cannot discharge outer-scope resource 'outermost_f' inside @scope boundary. Handle outside the scope or escape via branch constructor.
  --> tests/regression/300_ADVANCED_FEATURES/335_OBLIGATION_STRESS/335_005_nested_loop_inner_discharges_outer/input.k:15:8

❌ Compiler coordination error: Auto-discharge failed (multiple disposal options or no disposal event)
   (set KORU_BACKEND_TRACE=1 for the backend return trace)

Must contain:

KORU032

Flows

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

open (path: "outermost.txt")

Test Configuration

MUST_ERROR

← 004 loop body discharges outer 006 err branch leaks opened resource →