18 open tx empty commit

✓ Passing This code compiles and runs correctly.

Code

// Ground truth for korulang.org phantom explorer — commit without exec
//
// EXPECTED: Compiler error — started! cannot commit
~import app/db
~app/db:open(connstr: "postgres://localhost/test")
| connected c |> app/db:tx.begin(conn: c): t |> app/db:tx.commit(tx: t): conn |> app/db:close(conn)
| connection-failed |> _

input.kz

Must contain:

Phantom state mismatch

Error Verification

Actual Compiler Output

error[KORU030]: Phantom state mismatch: expected 'app.db:active' but got 'app.db:started!' for argument 'tx'
  --> phantom_semantic_check:6:0

❌ Compiler coordination error: Phantom semantic validation failed
error: CompilerCoordinationFailed
???:?:?: 0x10300f9d3 in _backend.RuntimeEmitter.emit (???)
???:?:?: 0x103010b63 in _backend.main (???)

Flows

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

open (connstr: "postgres://localhost/test")

Imported Files

// open/tx lifecycle API — ground truth for korulang.org phantom explorer

const std = @import("std");

const Connection = struct { handle: i32 };
const Transaction = struct { conn_handle: i32 };

~pub event open { connstr: []const u8 }
| connected *Connection<connected!>
| connection-failed

~proc open|zig {
    _ = connstr;
    const c = std.heap.page_allocator.create(Connection) catch unreachable;
    c.* = Connection{ .handle = 42 };
    return .{ .connected = c };
}

~pub event tx.begin { conn: *Connection<!connected|!active> } -> *Transaction<started!>

~proc tx.begin|zig {
    const t = std.heap.page_allocator.create(Transaction) catch unreachable;
    t.* = Transaction{ .conn_handle = conn.handle };
    return t;
}

~pub event tx.exec { tx: *Transaction<!started|!active>, sql: []const u8 } -> *Transaction<active!>

~proc tx.exec|zig {
    std.debug.print("Executing: {s}\n", .{sql});
    return tx;
}

~pub event tx.commit { tx: *Transaction<!active> } -> *Connection<active!>

~proc tx.commit|zig {
    std.debug.print("COMMIT\n", .{});
    const c = std.heap.page_allocator.create(Connection) catch unreachable;
    c.* = Connection{ .handle = tx.conn_handle };
    std.heap.page_allocator.destroy(tx);
    return c;
}

~pub event tx.rollback { tx: *Transaction<!active> } -> *Connection<active!>

~proc tx.rollback|zig {
    std.debug.print("ROLLBACK\n", .{});
    const c = std.heap.page_allocator.create(Connection) catch unreachable;
    c.* = Connection{ .handle = tx.conn_handle };
    std.heap.page_allocator.destroy(tx);
    return .{ .rolled_back = c };
}

~pub event close { conn: *Connection<!active> }

~proc close|zig {
    std.debug.print("Connection closed\n", .{});
    std.heap.page_allocator.destroy(conn);
}

db.kz

Test Configuration

MUST_FAIL

← 17 open tx multiple execs 19 open tx close early →