019 auto discharge branch constructor

✗ Failing This test is currently failing.

Failed: backend-exec

Failure Output

error[KORU021]: continuation branch 'opened' on tor 'app.fs:open' — a bare return has no tags
  --> tests/regression/300_ADVANCED_FEATURES/330_PHANTOM_TYPES/330_019_auto_discharge_branch_constructor/input.kz:4:0
  hint: bind the value with `: name`, not `| opened`

❌ Compiler coordination error: Incomplete branch coverage
   (set KORU_BACKEND_TRACE=1 for the backend return trace)

Code

~import app/fs
~tor check-file { path: string } -> string
~check-file = app/fs:open(path)
| opened _ -> "file exists"  // obligation should be auto-discharged before returning!
~check-file(path: "test.txt")

input.kz

Expected output

Opening file: test.txt
Closing file (auto-discharged)

Flows

subflow ~check-file click a branch to expand · @labels scroll to their anchor

open (path)

flow ~check-file click a branch to expand · @labels scroll to their anchor

check-file (path: "test.txt")

Imported 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 f = std.heap.page_allocator.create(File) catch unreachable;
    f.* = File{ .handle = 42 };
    return f;
}

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

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

fs.kz

Test Configuration

MUST_RUN

← 018 auto discharge escaped obligation 020 auto discharge void event →