Merge pull request 'fix(events): recover partial appends without restarting' (#11) from us-092-write-local-character-and-system-events into main

src/main/java/games/dmg/fantasystick/events/LocalEventLog.java

@@ -60,6 +60,7 @@ public final class LocalEventLog implements AutoCloseable {
     private final java.nio.channels.FileLock writerLock;
     private long sequence;
     private Path segment;
+    private Path damagedSegment;
     private LocalDate segmentDate;
     private long segmentBytes;
     private int segmentNumber;
@@ -203,24 +204,40 @@ public final class LocalEventLog implements AutoCloseable {
         }
         boolean recovered = false;
         for (var path : files) {
-            if (Files.isSymbolicLink(path)) throw new IOException("Symbolic link in Fantasy Stick event segments");
-            var bytes = Files.readAllBytes(path);
-            int prefix=0,cursor=0;while(cursor<bytes.length){int end=cursor;while(end<bytes.length&&bytes[end]!='\n')end++;if(end==bytes.length)break;var line=java.util.Arrays.copyOfRange(bytes,cursor,end+1);if(!validJsonObjectLine(line))break;prefix=end+1;cursor=end+1;}if(prefix==bytes.length)continue;
-            recovered = true;
-            var quarantine = path.resolveSibling(path.getFileName() + ".corrupt-" + UUID.randomUUID());
-            try (var channel = FileChannel.open(quarantine, StandardOpenOption.CREATE_NEW, StandardOpenOption.WRITE)) {
-                var tail = ByteBuffer.wrap(bytes, prefix, bytes.length - prefix);
-                while (tail.hasRemaining()) channel.write(tail);
-                channel.force(true);
-            }
-            try (var channel = FileChannel.open(path, StandardOpenOption.WRITE)) {
-                channel.truncate(prefix);
-                channel.force(true);
-            }
+            recovered |= recoverInterruptedTail(path);
         }
         return recovered;
     }
 
+    /** Quarantine must be forced before truncation; failure leaves pending work and repair state intact. */
+    private boolean recoverInterruptedTail(Path path) throws IOException {
+        if (Files.isSymbolicLink(path)) throw new IOException("Symbolic link in Fantasy Stick event segments");
+        var bytes = Files.readAllBytes(path);
+        int prefix = 0;
+        int cursor = 0;
+        while (cursor < bytes.length) {
+            int end = cursor;
+            while (end < bytes.length && bytes[end] != '\n') end++;
+            if (end == bytes.length) break;
+            var line = java.util.Arrays.copyOfRange(bytes, cursor, end + 1);
+            if (!validJsonObjectLine(line)) break;
+            prefix = end + 1;
+            cursor = end + 1;
+        }
+        if (prefix == bytes.length) return false;
+        var quarantine = path.resolveSibling(path.getFileName() + ".corrupt-" + UUID.randomUUID());
+        try (var channel = FileChannel.open(quarantine, StandardOpenOption.CREATE_NEW, StandardOpenOption.WRITE)) {
+            var tail = ByteBuffer.wrap(bytes, prefix, bytes.length - prefix);
+            while (tail.hasRemaining()) channel.write(tail);
+            channel.force(true);
+        }
+        try (var channel = FileChannel.open(path, StandardOpenOption.WRITE)) {
+            channel.truncate(prefix);
+            channel.force(true);
+        }
+        return true;
+    }
+
     private int recoverPending() throws IOException {
         List<Path> files;
         try (var stream = Files.list(pending)) {
@@ -247,6 +264,10 @@ public final class LocalEventLog implements AutoCloseable {
     }
 
     private void append(byte[] line) throws IOException {
+        if (damagedSegment != null) {
+            recoverInterruptedTail(damagedSegment);
+            damagedSegment = null;
+        }
         var date = LocalDate.ofInstant(clock.instant(), ZoneOffset.UTC);
         if (segment == null || !date.equals(segmentDate)
                 || segmentBytes > 0 && segmentBytes + line.length > maximumSegmentBytes) {
@@ -256,6 +277,14 @@ public final class LocalEventLog implements AutoCloseable {
             var buffer = ByteBuffer.wrap(line);
             while (buffer.hasRemaining()) channel.write(buffer);
             channel.force(true);
+        } catch (IOException failure) {
+            // Even open/force/close failures can leave uncertain bytes. Never reuse this
+            // segment or acknowledge pending work until its tail has been repaired.
+            damagedSegment = segment;
+            segment = null;
+            segmentDate = null;
+            segmentBytes = 0;
+            throw failure;
         }
         segmentBytes += line.length;
     }

src/nativeTest/java/games/dmg/fantasystick/LocalEventPartialWriteNativeTest.java

@@ -0,0 +1,359 @@
+package games.dmg.fantasystick;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.ArgumentMatchers.*;
+import static org.mockito.Mockito.*;
+
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParser;
+import games.dmg.fantasystick.events.EventInput;
+import games.dmg.fantasystick.events.LocalEventLog;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.StandardOpenOption;
+import java.time.Clock;
+import java.time.Instant;
+import java.time.ZoneOffset;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.UUID;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicInteger;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+import org.mockito.MockedStatic;
+
+/** Real file bytes and owned writer callbacks; only the append channel's failure is injected. */
+final class LocalEventPartialWriteNativeTest {
+    @TempDir Path data;
+    @BeforeAll static void bootstrap() throws Exception { NativeRuntime.bootstrap(); }
+
+    @Test void sameLifetimeRetryPreservesPrefixAndExportsExactPendingRecordAfterPartialWrite() throws Exception {
+        var clock = Clock.fixed(Instant.parse("2026-09-26T12:00:00Z"), ZoneOffset.UTC);
+        var diagnostics = new ArrayList<String>();
+        try (var log = LocalEventLog.open(data, clock,
+                new LocalEventLog.RuntimeInfo("Season 4", "26.2", "test"), 8, 134_217_728L, diagnostics::add)) {
+            assertEquals(LocalEventLog.Delivery.EXPORTED, log.ready().toCompletableFuture().get(5, TimeUnit.SECONDS));
+            var original = segments().getFirst();
+            var prefix = Files.readAllBytes(original);
+            var input = event(clock, "original\nUnicode ☃");
+            var pending = data.resolve("events/pending/" + input.id() + ".pending");
+            byte[] exact;
+            try (var fault = new AppendFault(log)) {
+                fault.failNext(1);
+                assertEquals(LocalEventLog.Delivery.DURABLE_PENDING,
+                    log.emit(input).toCompletableFuture().get(5, TimeUnit.SECONDS));
+                exact = Files.readAllBytes(pending);
+                assertEquals(1, fault.failures.get());
+                assertArrayEquals(concat(prefix, Arrays.copyOf(exact, AppendFault.PARTIAL_BYTES)),
+                    Files.readAllBytes(original), "the injected fault must really persist a partial record");
+                assertEquals(LocalEventLog.Delivery.EXPORTED,
+                    log.emit(event(clock, "next")).toCompletableFuture().get(5, TimeUnit.SECONDS));
+            }
+            assertFalse(Files.exists(pending));
+            var rows = exported(); // Strict JSON parser: concatenating the pending record onto its fragment is RED.
+            var recovered = rows.stream().filter(row -> input.id().toString().equals(row.get("id").getAsString())).toList();
+            assertEquals(1, recovered.size());
+            assertEquals(JsonParser.parseString(new String(exact, java.nio.charset.StandardCharsets.UTF_8)), recovered.getFirst());
+            assertTrue(Files.readAllBytes(original).length >= prefix.length);
+            assertArrayEquals(prefix, Arrays.copyOf(Files.readAllBytes(original), prefix.length));
+            assertTrue(corruptEvidence().stream().anyMatch(bytes ->
+                Arrays.equals(Arrays.copyOf(exact, AppendFault.PARTIAL_BYTES), bytes)));
+            assertTrue(diagnostics.stream().anyMatch(message -> message.contains("durable pending")));
+        }
+        exported();
+    }
+
+    @Test void partialWriteDuringPendingReplayRetainsExactProofUntilASecondRecoverySucceeds() throws Exception {
+        var clock = Clock.fixed(Instant.parse("2026-09-26T12:00:00Z"), ZoneOffset.UTC);
+        try (var log = LocalEventLog.open(data, clock,
+                new LocalEventLog.RuntimeInfo("Season 4", "26.2", "test"), 8, 134_217_728L, ignored -> { })) {
+            log.ready().toCompletableFuture().get(5, TimeUnit.SECONDS);
+            var input = event(clock, "pending replay");
+            var pending = data.resolve("events/pending/" + input.id() + ".pending");
+            try (var fault = new AppendFault(log)) {
+                fault.failNext(2);
+                assertEquals(LocalEventLog.Delivery.DURABLE_PENDING,
+                    log.emit(input).toCompletableFuture().get(5, TimeUnit.SECONDS));
+                var exact = Files.readAllBytes(pending);
+                var unaccepted = event(clock, "not yet accepted");
+                assertEquals(LocalEventLog.Delivery.REJECTED,
+                    log.emit(unaccepted).toCompletableFuture().get(5, TimeUnit.SECONDS));
+                assertArrayEquals(exact, Files.readAllBytes(pending));
+                assertEquals(2, fault.failures.get());
+                assertEquals(LocalEventLog.Delivery.EXPORTED,
+                    log.emit(event(clock, "retry")).toCompletableFuture().get(5, TimeUnit.SECONDS));
+                assertFalse(Files.exists(pending));
+                var rows = exported();
+                assertEquals(List.of(JsonParser.parseString(new String(exact, java.nio.charset.StandardCharsets.UTF_8))),
+                    rows.stream().filter(row -> input.id().toString().equals(row.get("id").getAsString())).toList());
+                assertTrue(rows.stream().noneMatch(row -> unaccepted.id().toString().equals(row.get("id").getAsString())));
+                assertEquals(2, corruptEvidence().stream().filter(bytes ->
+                    Arrays.equals(Arrays.copyOf(exact, AppendFault.PARTIAL_BYTES), bytes)).count());
+            }
+        }
+    }
+
+    @Test void failedQuarantineForceCannotTruncateDamageDeletePendingOrAcknowledgeReplay() throws Exception {
+        var clock = Clock.fixed(Instant.parse("2026-09-26T12:00:00Z"), ZoneOffset.UTC);
+        try (var log = LocalEventLog.open(data, clock,
+                new LocalEventLog.RuntimeInfo("Season 4", "26.2", "test"), 8, 134_217_728L, ignored -> { })) {
+            log.ready().toCompletableFuture().get(5, TimeUnit.SECONDS);
+            var original = segments().getFirst();
+            var input = event(clock, "quarantine failure");
+            var pending = data.resolve("events/pending/" + input.id() + ".pending");
+            try (var fault = new AppendFault(log)) {
+                fault.failNext(1);
+                assertEquals(LocalEventLog.Delivery.DURABLE_PENDING,
+                    log.emit(input).toCompletableFuture().get(5, TimeUnit.SECONDS));
+                var exact = Files.readAllBytes(pending);
+                var damaged = Files.readAllBytes(original);
+                fault.quarantineForceFailures.set(1);
+                assertEquals(LocalEventLog.Delivery.REJECTED,
+                    log.emit(event(clock, "repair unavailable")).toCompletableFuture().get(5, TimeUnit.SECONDS));
+                assertEquals(1, fault.failedQuarantines.get());
+                assertArrayEquals(damaged, Files.readAllBytes(original), "unforced quarantine must not authorize truncation");
+                assertArrayEquals(exact, Files.readAllBytes(pending));
+                assertEquals(LocalEventLog.Delivery.EXPORTED,
+                    log.emit(event(clock, "repair available")).toCompletableFuture().get(5, TimeUnit.SECONDS));
+                assertFalse(Files.exists(pending));
+                assertEquals(1, exported().stream().filter(row -> input.id().toString().equals(row.get("id").getAsString())).count());
+                assertTrue(corruptEvidence().stream().anyMatch(bytes ->
+                    Arrays.equals(Arrays.copyOf(exact, AppendFault.PARTIAL_BYTES), bytes)));
+            }
+        }
+    }
+
+    @Test void completeWriteWithFailedForceRetainsPendingAndPermitsOnlyIdenticalAtLeastOnceDuplicates() throws Exception {
+        var clock = Clock.fixed(Instant.parse("2026-09-26T12:00:00Z"), ZoneOffset.UTC);
+        try (var log = LocalEventLog.open(data, clock,
+                new LocalEventLog.RuntimeInfo("Season 4", "26.2", "test"), 8, 134_217_728L, ignored -> { })) {
+            log.ready().toCompletableFuture().get(5, TimeUnit.SECONDS);
+            var input = event(clock, "uncertain force");
+            var pending = data.resolve("events/pending/" + input.id() + ".pending");
+            try (var fault = new AppendFault(log)) {
+                fault.appendForceFailures.set(1);
+                assertEquals(LocalEventLog.Delivery.DURABLE_PENDING,
+                    log.emit(input).toCompletableFuture().get(5, TimeUnit.SECONDS));
+                var exact = Files.readAllBytes(pending);
+                assertEquals(1, fault.failedAppendForces.get());
+                assertEquals(LocalEventLog.Delivery.EXPORTED,
+                    log.emit(event(clock, "retry")).toCompletableFuture().get(5, TimeUnit.SECONDS));
+                var repeated = exported().stream().filter(row -> input.id().toString().equals(row.get("id").getAsString())).toList();
+                assertEquals(2, repeated.size(), "an uncertain completed append may repeat, never promise exactly once");
+                for (var row : repeated) assertEquals(JsonParser.parseString(new String(exact, java.nio.charset.StandardCharsets.UTF_8)), row);
+                assertFalse(Files.exists(pending));
+                assertTrue(corruptEvidence().isEmpty(), "complete valid records must not be quarantined or rewritten");
+            }
+        }
+    }
+
+    @Test void registeredCancelledNativeActionRecoversItsOriginalContextWithoutRestartOrGameplayMutation() throws Exception {
+        try (var fixture = new FantasyStickLifecycleNativeTest.Fixture(data);
+                var nativeFailures = new NativeFailures(fixture)) {
+            fixture.plugin.setEnabled(true);
+            var actor = new FantasyStickLifecycleNativeTest.Actor(data);
+            fixture.players.put(actor.core.id, actor.player);
+            fixture.activate(actor);
+            doReturn(null).when(actor.player).getFishHook(); // No hook exists for this ordinary held-slot event.
+            var log = (LocalEventLog) FantasyStickLifecycleNativeTest.Fixture.field(fixture.plugin, "eventLog");
+            log.ready().toCompletableFuture().get(5, TimeUnit.SECONDS);
+            var before = actor.core.snapshot();
+            var event = new org.bukkit.event.player.PlayerItemHeldEvent(actor.player, 0, 1);
+            event.setCancelled(true);
+            try (var fault = new AppendFault(log)) {
+                fault.onlyContaining = "\"entry_point\":\"PlayerItemHeldEvent\"";
+                fault.failNext(1);
+                fixture.dispatcher.accept(event);
+                fault.worker.submit(() -> { }).get(5, TimeUnit.SECONDS); // Both real registered capture stages settle.
+                assertEquals(1, fault.failures.get());
+                assertTrue(event.isCancelled());
+                assertArrayEquals(before, actor.core.snapshot());
+                var exact = JsonParser.parseString(new String(fault.failedLine, java.nio.charset.StandardCharsets.UTF_8)).getAsJsonObject();
+                assertTrue(exact.get("type").getAsString().endsWith("action.observed"));
+                assertEquals(actor.core.id.toString(), exact.get("playerid").getAsString());
+                assertEquals(actor.core.record.id().toString(), exact.get("characterid").getAsString());
+                var correlated = fault.worker.submit(this::exported).get(5, TimeUnit.SECONDS).stream()
+                    .filter(row -> exact.getAsJsonObject("data").get("action_id")
+                    .equals(row.getAsJsonObject("data").get("action_id"))).toList();
+                assertEquals(2, correlated.size(), "one observation and one resolution, never a duplicated success");
+                assertEquals(List.of(exact), correlated.stream().filter(row -> row.get("id").equals(exact.get("id"))).toList());
+                var resolved = correlated.stream().filter(row -> row.get("type").getAsString().endsWith("action.resolved"))
+                    .findFirst().orElseThrow().getAsJsonObject("data");
+                assertTrue(resolved.get("cancelled").getAsBoolean());
+                assertEquals("cancelled", resolved.get("outcome").getAsString());
+                nativeFailures.assertClean();
+                assertFalse(Files.exists(data.resolve("events/pending/" + exact.get("id").getAsString() + ".pending")));
+                assertTrue(corruptEvidence().stream().anyMatch(bytes ->
+                    Arrays.equals(Arrays.copyOf(fault.failedLine, AppendFault.PARTIAL_BYTES), bytes)));
+            }
+        }
+        assertEquals(1, exported().stream().filter(row -> row.get("type").getAsString().endsWith("game.stopped")).count());
+    }
+
+    private static EventInput event(Clock clock, String marker) {
+        return new EventInput(UUID.randomUUID(), UUID.randomUUID(), clock.instant(), "action.observed", null,
+            Map.of("action_kind", "partial_write_probe", "marker", marker, "outcome", "observed"));
+    }
+
+    private List<Path> segments() throws IOException {
+        try (var files = Files.walk(data.resolve("events"))) {
+            return files.filter(path -> path.getFileName().toString().endsWith(".jsonl")).sorted().toList();
+        }
+    }
+
+    private List<JsonObject> exported() throws IOException {
+        var rows = new ArrayList<JsonObject>();
+        for (var path : segments()) {
+            var bytes = Files.readAllBytes(path);
+            if (bytes.length == 0) continue;
+            assertEquals('\n', bytes[bytes.length - 1], "every exported record must be LF terminated");
+            for (var line : Files.readAllLines(path)) rows.add(JsonParser.parseString(line).getAsJsonObject());
+        }
+        return rows;
+    }
+
+    private List<byte[]> corruptEvidence() throws IOException {
+        var evidence = new ArrayList<byte[]>();
+        try (var files = Files.walk(data.resolve("events"))) {
+            for (var path : files.filter(path -> path.getFileName().toString().contains(".corrupt-")).toList()) {
+                assertFalse(path.getFileName().toString().endsWith(".jsonl"));
+                evidence.add(Files.readAllBytes(path));
+            }
+        }
+        return evidence;
+    }
+
+    private static byte[] concat(byte[] first, byte[] second) {
+        var bytes = Arrays.copyOf(first, first.length + second.length);
+        System.arraycopy(second, 0, bytes, first.length, second.length);
+        return bytes;
+    }
+
+    /** Capture, never suppress, failures from this fixture's native callback boundaries. */
+    private static final class NativeFailures implements AutoCloseable {
+        private final java.util.logging.Logger server;
+        private final java.util.logging.Logger plugin;
+        private final List<java.util.logging.LogRecord> failures = new java.util.concurrent.CopyOnWriteArrayList<>();
+        private final java.util.logging.Handler handler = new java.util.logging.Handler() {
+            @Override public void publish(java.util.logging.LogRecord record) {
+                if (record.getLevel().intValue() >= java.util.logging.Level.SEVERE.intValue()) failures.add(record);
+            }
+            @Override public void flush() { }
+            @Override public void close() { }
+        };
+        private NativeFailures(FantasyStickLifecycleNativeTest.Fixture fixture) {
+            server = fixture.server.getLogger();
+            plugin = fixture.plugin.getLogger();
+            server.addHandler(handler);
+            if (plugin != server) plugin.addHandler(handler);
+        }
+        private void assertClean() {
+            assertTrue(failures.isEmpty(), () -> failures.stream()
+                .map(record -> record.getMessage() + ": " + record.getThrown()).toList().toString());
+        }
+        @Override public void close() {
+            server.removeHandler(handler);
+            if (plugin != server) plugin.removeHandler(handler);
+            assertClean();
+        }
+    }
+
+    /** Scoped to this log's serial worker, never installed globally or on the native/main thread. */
+    private static final class AppendFault implements AutoCloseable {
+        private static final int PARTIAL_BYTES = 47;
+        private final ExecutorService worker;
+        private final MockedStatic<FileChannel> channels;
+        private final AtomicInteger remaining = new AtomicInteger();
+        private final AtomicInteger failures = new AtomicInteger();
+        private final AtomicInteger appendForceFailures = new AtomicInteger();
+        private final AtomicInteger failedAppendForces = new AtomicInteger();
+        private final AtomicInteger quarantineForceFailures = new AtomicInteger();
+        private final AtomicInteger failedQuarantines = new AtomicInteger();
+        private volatile String onlyContaining;
+        private volatile byte[] failedLine;
+
+        private AppendFault(LocalEventLog log) throws Exception {
+            worker = (ExecutorService) FantasyStickLifecycleNativeTest.Fixture.field(log, "worker");
+            channels = worker.submit(() -> {
+                var scoped = mockStatic(FileChannel.class, CALLS_REAL_METHODS);
+                try {
+                    scoped.when(() -> FileChannel.open(any(Path.class), eq(StandardOpenOption.WRITE),
+                        eq(StandardOpenOption.APPEND))).thenAnswer(call -> {
+                            if (remaining.get() == 0 && appendForceFailures.get() == 0) return call.callRealMethod();
+                            Path path = call.getArgument(0);
+                            var real = path.getFileSystem().provider().newFileChannel(path,
+                                Set.of(StandardOpenOption.WRITE, StandardOpenOption.APPEND));
+                            var failing = mock(FileChannel.class);
+                            doAnswer(write -> {
+                                ByteBuffer source = write.getArgument(0);
+                                var complete = new byte[source.remaining()];
+                                source.duplicate().get(complete);
+                                if ((onlyContaining == null || new String(complete, java.nio.charset.StandardCharsets.UTF_8)
+                                        .contains(onlyContaining)) && take(remaining)) {
+                                    failedLine = complete;
+                                    var partial = source.slice();
+                                    partial.limit(Math.min(PARTIAL_BYTES, partial.remaining()));
+                                    while (partial.hasRemaining()) real.write(partial);
+                                    real.force(true);
+                                    failures.incrementAndGet();
+                                    throw new IOException("controlled partial append");
+                                }
+                                return real.write(source);
+                            }).when(failing).write(any(ByteBuffer.class));
+                            doAnswer(force -> {
+                                if (take(appendForceFailures)) {
+                                    failedAppendForces.incrementAndGet();
+                                    throw new IOException("controlled append force failure");
+                                }
+                                real.force(force.getArgument(0));
+                                return null;
+                            }).when(failing).force(anyBoolean());
+                            doAnswer(close -> { real.close(); return null; }).when(failing).close();
+                            return failing;
+                        });
+                    scoped.when(() -> FileChannel.open(any(Path.class), eq(StandardOpenOption.CREATE_NEW),
+                        eq(StandardOpenOption.WRITE))).thenAnswer(call -> {
+                            Path path = call.getArgument(0);
+                            if (!path.getFileName().toString().contains(".corrupt-") || !take(quarantineForceFailures))
+                                return call.callRealMethod();
+                            var real = path.getFileSystem().provider().newFileChannel(path,
+                                Set.of(StandardOpenOption.CREATE_NEW, StandardOpenOption.WRITE));
+                            var failing = mock(FileChannel.class);
+                            doAnswer(write -> real.write((ByteBuffer) write.getArgument(0))).when(failing).write(any(ByteBuffer.class));
+                            doAnswer(force -> {
+                                failedQuarantines.incrementAndGet();
+                                throw new IOException("controlled quarantine force failure");
+                            }).when(failing).force(anyBoolean());
+                            doAnswer(close -> { real.close(); return null; }).when(failing).close();
+                            return failing;
+                        });
+                    return scoped;
+                } catch (Throwable failure) {
+                    scoped.close();
+                    throw failure;
+                }
+            }).get(5, TimeUnit.SECONDS);
+        }
+
+        private static boolean take(AtomicInteger count) {
+            return count.getAndUpdate(value -> Math.max(0, value - 1)) > 0;
+        }
+
+        private void failNext(int count) { remaining.set(count); }
+
+        @Override public void close() {
+            try { worker.submit(channels::close).get(5, TimeUnit.SECONDS); }
+            catch (InterruptedException interrupted) { Thread.currentThread().interrupt(); throw new AssertionError(interrupted); }
+            catch (Exception failure) { throw new AssertionError(failure); }
+        }
+    }
+}