src/emerge.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
   4 Copyright (C) 2010-2013 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU Lesser General Public License as published by
   8 the Free Software Foundation; either version 2.1 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU Lesser General Public License for more details.
  15
  16 You should have received a copy of the GNU Lesser General Public License along
  17 with this program; if not, write to the Free Software Foundation, Inc.,
  18 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19 */
  20
  21
  22 #include "emerge.h"
  23
  24 #include <iostream>
  25 #include <queue>
  26
  27 #include "util/container.h"
  28 #include "util/thread.h"
  29 #include "threading/event.h"
  30
  31 #include "config.h"
  32 #include "constants.h"
  33 #include "environment.h"
  34 #include "log.h"
  35 #include "map.h"
  36 #include "mapblock.h"
  37 #include "mapgen_flat.h"
  38 #include "mapgen_fractal.h"
  39 #include "mapgen_v5.h"
  40 #include "mapgen_v6.h"
  41 #include "mapgen_v7.h"
  42 #include "mapgen_valleys.h"
  43 #include "mapgen_singlenode.h"
  44 #include "mg_biome.h"
  45 #include "mg_ore.h"
  46 #include "mg_decoration.h"
  47 #include "mg_schematic.h"
  48 #include "nodedef.h"
  49 #include "profiler.h"
  50 #include "scripting_game.h"
  51 #include "server.h"
  52 #include "serverobject.h"
  53 #include "settings.h"
  54 #include "voxel.h"
  55
  56
  57 struct MapgenDesc {
  58         const char *name;
  59         MapgenFactory *factory;
  60         bool is_user_visible;
  61 };
  62
  63 class EmergeThread : public Thread {
  64 public:
  65         bool enable_mapgen_debug_info;
  66         int id;
  67
  68         EmergeThread(Server *server, int ethreadid);
  69         ~EmergeThread();
  70
  71         void *run();
  72         void signal();
  73
  74         // Requires queue mutex held
  75         bool pushBlock(v3s16 pos);
  76
  77         void cancelPendingItems();
  78
  79         static void runCompletionCallbacks(
  80                 v3s16 pos, EmergeAction action,
  81                 const EmergeCallbackList &callbacks);
  82
  83 private:
  84         Server *m_server;
  85         ServerMap *m_map;
  86         EmergeManager *m_emerge;
  87         Mapgen *m_mapgen;
  88
  89         Event m_queue_event;
  90         std::queue<v3s16> m_block_queue;
  91
  92         bool popBlockEmerge(v3s16 *pos, BlockEmergeData *bedata);
  93
  94         EmergeAction getBlockOrStartGen(
  95                 v3s16 pos, bool allow_gen, MapBlock **block, BlockMakeData *data);
  96         MapBlock *finishGen(v3s16 pos, BlockMakeData *bmdata,
  97                 std::map<v3s16, MapBlock *> *modified_blocks);
  98
  99         friend class EmergeManager;
 100 };
 101
 102 ////
 103 //// Built-in mapgens
 104 ////
 105
 106 MapgenDesc g_reg_mapgens[] = {
 107         {"v5",         new MapgenFactoryV5,         true},
 108         {"v6",         new MapgenFactoryV6,         true},
 109         {"v7",         new MapgenFactoryV7,         true},
 110         {"flat",       new MapgenFactoryFlat,       true},
 111         {"fractal",    new MapgenFactoryFractal,    true},
 112         {"valleys",    new MapgenFactoryValleys,    true},
 113         {"singlenode", new MapgenFactorySinglenode, false},
 114 };
 115
 116 ////
 117 //// EmergeManager
 118 ////
 119
 120 EmergeManager::EmergeManager(IGameDef *gamedef)
 121 {
 122         this->ndef      = gamedef->getNodeDefManager();
 123         this->biomemgr  = new BiomeManager(gamedef);
 124         this->oremgr    = new OreManager(gamedef);
 125         this->decomgr   = new DecorationManager(gamedef);
 126         this->schemmgr  = new SchematicManager(gamedef);
 127         this->gen_notify_on = 0;
 128
 129         // Note that accesses to this variable are not synchronized.
 130         // This is because the *only* thread ever starting or stopping
 131         // EmergeThreads should be the ServerThread.
 132         this->m_threads_active = false;
 133
 134         enable_mapgen_debug_info = g_settings->getBool("enable_mapgen_debug_info");
 135
 136         // If unspecified, leave a proc for the main thread and one for
 137         // some other misc thread
 138         s16 nthreads = 0;
 139         if (!g_settings->getS16NoEx("num_emerge_threads", nthreads))
 140                 nthreads = Thread::getNumberOfProcessors() - 2;
 141         if (nthreads < 1)
 142                 nthreads = 1;
 143
 144         m_qlimit_total = g_settings->getU16("emergequeue_limit_total");
 145         if (!g_settings->getU16NoEx("emergequeue_limit_diskonly", m_qlimit_diskonly))
 146                 m_qlimit_diskonly = nthreads * 5 + 1;
 147         if (!g_settings->getU16NoEx("emergequeue_limit_generate", m_qlimit_generate))
 148                 m_qlimit_generate = nthreads + 1;
 149
 150         // don't trust user input for something very important like this
 151         if (m_qlimit_total < 1)
 152                 m_qlimit_total = 1;
 153         if (m_qlimit_diskonly < 1)
 154                 m_qlimit_diskonly = 1;
 155         if (m_qlimit_generate < 1)
 156                 m_qlimit_generate = 1;
 157
 158         for (s16 i = 0; i < nthreads; i++)
 159                 m_threads.push_back(new EmergeThread((Server *)gamedef, i));
 160
 161         infostream << "EmergeManager: using " << nthreads << " threads" << std::endl;
 162 }
 163
 164
 165 EmergeManager::~EmergeManager()
 166 {
 167         for (u32 i = 0; i != m_threads.size(); i++) {
 168                 EmergeThread *thread = m_threads[i];
 169
 170                 if (m_threads_active) {
 171                         thread->stop();
 172                         thread->signal();
 173                         thread->wait();
 174                 }
 175
 176                 delete thread;
 177                 delete m_mapgens[i];
 178         }
 179
 180         delete biomemgr;
 181         delete oremgr;
 182         delete decomgr;
 183         delete schemmgr;
 184
 185         delete params.sparams;
 186 }
 187
 188
 189 void EmergeManager::loadMapgenParams()
 190 {
 191         params.load(*g_settings);
 192 }
 193
 194
 195 void EmergeManager::initMapgens()
 196 {
 197         if (m_mapgens.size())
 198                 return;
 199
 200         MapgenFactory *mgfactory = getMapgenFactory(params.mg_name);
 201         if (!mgfactory) {
 202                 errorstream << "EmergeManager: mapgen " << params.mg_name <<
 203                         " not registered; falling back to " << DEFAULT_MAPGEN << std::endl;
 204
 205                 params.mg_name = DEFAULT_MAPGEN;
 206
 207                 mgfactory = getMapgenFactory(params.mg_name);
 208                 FATAL_ERROR_IF(mgfactory == NULL, "Couldn't use any mapgen!");
 209         }
 210
 211         if (!params.sparams) {
 212                 params.sparams = mgfactory->createMapgenParams();
 213                 params.sparams->readParams(g_settings);
 214         }
 215
 216         for (u32 i = 0; i != m_threads.size(); i++) {
 217                 Mapgen *mg = mgfactory->createMapgen(i, &params, this);
 218                 m_mapgens.push_back(mg);
 219         }
 220 }
 221
 222
 223 Mapgen *EmergeManager::getCurrentMapgen()
 224 {
 225         for (u32 i = 0; i != m_threads.size(); i++) {
 226                 if (m_threads[i]->isCurrentThread())
 227                         return m_threads[i]->m_mapgen;
 228         }
 229
 230         return NULL;
 231 }
 232
 233
 234 void EmergeManager::startThreads()
 235 {
 236         if (m_threads_active)
 237                 return;
 238
 239         for (u32 i = 0; i != m_threads.size(); i++)
 240                 m_threads[i]->start();
 241
 242         m_threads_active = true;
 243 }
 244
 245
 246 void EmergeManager::stopThreads()
 247 {
 248         if (!m_threads_active)
 249                 return;
 250
 251         // Request thread stop in parallel
 252         for (u32 i = 0; i != m_threads.size(); i++) {
 253                 m_threads[i]->stop();
 254                 m_threads[i]->signal();
 255         }
 256
 257         // Then do the waiting for each
 258         for (u32 i = 0; i != m_threads.size(); i++)
 259                 m_threads[i]->wait();
 260
 261         m_threads_active = false;
 262 }
 263
 264
 265 bool EmergeManager::isRunning()
 266 {
 267         return m_threads_active;
 268 }
 269
 270
 271 bool EmergeManager::enqueueBlockEmerge(
 272         u16 peer_id,
 273         v3s16 blockpos,
 274         bool allow_generate,
 275         bool ignore_queue_limits)
 276 {
 277         u16 flags = 0;
 278         if (allow_generate)
 279                 flags |= BLOCK_EMERGE_ALLOW_GEN;
 280         if (ignore_queue_limits)
 281                 flags |= BLOCK_EMERGE_FORCE_QUEUE;
 282
 283         return enqueueBlockEmergeEx(blockpos, peer_id, flags, NULL, NULL);
 284 }
 285
 286
 287 bool EmergeManager::enqueueBlockEmergeEx(
 288         v3s16 blockpos,
 289         u16 peer_id,
 290         u16 flags,
 291         EmergeCompletionCallback callback,
 292         void *callback_param)
 293 {
 294         EmergeThread *thread = NULL;
 295         bool entry_already_exists = false;
 296
 297         {
 298                 MutexAutoLock queuelock(m_queue_mutex);
 299
 300                 if (!pushBlockEmergeData(blockpos, peer_id, flags,
 301                                 callback, callback_param, &entry_already_exists))
 302                         return false;
 303
 304                 if (entry_already_exists)
 305                         return true;
 306
 307                 thread = getOptimalThread();
 308                 thread->pushBlock(blockpos);
 309         }
 310
 311         thread->signal();
 312
 313         return true;
 314 }
 315
 316
 317 //
 318 // Mapgen-related helper functions
 319 //
 320
 321 v3s16 EmergeManager::getContainingChunk(v3s16 blockpos)
 322 {
 323         return getContainingChunk(blockpos, params.chunksize);
 324 }
 325
 326
 327 v3s16 EmergeManager::getContainingChunk(v3s16 blockpos, s16 chunksize)
 328 {
 329         s16 coff = -chunksize / 2;
 330         v3s16 chunk_offset(coff, coff, coff);
 331
 332         return getContainerPos(blockpos - chunk_offset, chunksize)
 333                 * chunksize + chunk_offset;
 334 }
 335
 336
 337 int EmergeManager::getSpawnLevelAtPoint(v2s16 p)
 338 {
 339         if (m_mapgens.size() == 0 || !m_mapgens[0]) {
 340                 errorstream << "EmergeManager: getSpawnLevelAtPoint() called"
 341                         " before mapgen init" << std::endl;
 342                 return 0;
 343         }
 344
 345         return m_mapgens[0]->getSpawnLevelAtPoint(p);
 346 }
 347
 348
 349 int EmergeManager::getGroundLevelAtPoint(v2s16 p)
 350 {
 351         if (m_mapgens.size() == 0 || !m_mapgens[0]) {
 352                 errorstream << "EmergeManager: getGroundLevelAtPoint() called"
 353                         " before mapgen init" << std::endl;
 354                 return 0;
 355         }
 356
 357         return m_mapgens[0]->getGroundLevelAtPoint(p);
 358 }
 359
 360
 361 bool EmergeManager::isBlockUnderground(v3s16 blockpos)
 362 {
 363 #if 0
 364         v2s16 p = v2s16((blockpos.X * MAP_BLOCKSIZE) + MAP_BLOCKSIZE / 2,
 365                                         (blockpos.Y * MAP_BLOCKSIZE) + MAP_BLOCKSIZE / 2);
 366         int ground_level = getGroundLevelAtPoint(p);
 367         return blockpos.Y * (MAP_BLOCKSIZE + 1) <= min(water_level, ground_level);
 368 #endif
 369
 370         // Use a simple heuristic; the above method is wildly inaccurate anyway.
 371         return blockpos.Y * (MAP_BLOCKSIZE + 1) <= params.water_level;
 372 }
 373
 374
 375 void EmergeManager::getMapgenNames(
 376         std::vector<const char *> *mgnames, bool include_hidden)
 377 {
 378         for (u32 i = 0; i != ARRLEN(g_reg_mapgens); i++) {
 379                 if (include_hidden || g_reg_mapgens[i].is_user_visible)
 380                         mgnames->push_back(g_reg_mapgens[i].name);
 381         }
 382 }
 383
 384
 385 MapgenFactory *EmergeManager::getMapgenFactory(const std::string &mgname)
 386 {
 387         for (u32 i = 0; i != ARRLEN(g_reg_mapgens); i++) {
 388                 if (mgname == g_reg_mapgens[i].name)
 389                         return g_reg_mapgens[i].factory;
 390         }
 391
 392         return NULL;
 393 }
 394
 395
 396 bool EmergeManager::pushBlockEmergeData(
 397         v3s16 pos,
 398         u16 peer_requested,
 399         u16 flags,
 400         EmergeCompletionCallback callback,
 401         void *callback_param,
 402         bool *entry_already_exists)
 403 {
 404         u16 &count_peer = m_peer_queue_count[peer_requested];
 405
 406         if ((flags & BLOCK_EMERGE_FORCE_QUEUE) == 0) {
 407                 if (m_blocks_enqueued.size() >= m_qlimit_total)
 408                         return false;
 409
 410                 if (peer_requested != PEER_ID_INEXISTENT) {
 411                         u16 qlimit_peer = (flags & BLOCK_EMERGE_ALLOW_GEN) ?
 412                                 m_qlimit_generate : m_qlimit_diskonly;
 413                         if (count_peer >= qlimit_peer)
 414                                 return false;
 415                 }
 416         }
 417
 418         std::pair<std::map<v3s16, BlockEmergeData>::iterator, bool> findres;
 419         findres = m_blocks_enqueued.insert(std::make_pair(pos, BlockEmergeData()));
 420
 421         BlockEmergeData &bedata = findres.first->second;
 422         *entry_already_exists   = !findres.second;
 423
 424         if (callback)
 425                 bedata.callbacks.push_back(std::make_pair(callback, callback_param));
 426
 427         if (*entry_already_exists) {
 428                 bedata.flags |= flags;
 429         } else {
 430                 bedata.flags = flags;
 431                 bedata.peer_requested = peer_requested;
 432
 433                 count_peer++;
 434         }
 435
 436         return true;
 437 }
 438
 439
 440 bool EmergeManager::popBlockEmergeData(
 441         v3s16 pos,
 442         BlockEmergeData *bedata)
 443 {
 444         std::map<v3s16, BlockEmergeData>::iterator it;
 445         std::map<u16, u16>::iterator it2;
 446
 447         it = m_blocks_enqueued.find(pos);
 448         if (it == m_blocks_enqueued.end())
 449                 return false;
 450
 451         *bedata = it->second;
 452
 453         it2 = m_peer_queue_count.find(bedata->peer_requested);
 454         if (it2 == m_peer_queue_count.end())
 455                 return false;
 456
 457         u16 &count_peer = it2->second;
 458         assert(count_peer != 0);
 459         count_peer--;
 460
 461         m_blocks_enqueued.erase(it);
 462
 463         return true;
 464 }
 465
 466
 467 EmergeThread *EmergeManager::getOptimalThread()
 468 {
 469         size_t nthreads = m_threads.size();
 470
 471         FATAL_ERROR_IF(nthreads == 0, "No emerge threads!");
 472
 473         size_t index = 0;
 474         size_t nitems_lowest = m_threads[0]->m_block_queue.size();
 475
 476         for (size_t i = 1; i < nthreads; i++) {
 477                 size_t nitems = m_threads[i]->m_block_queue.size();
 478                 if (nitems < nitems_lowest) {
 479                         index = i;
 480                         nitems_lowest = nitems;
 481                 }
 482         }
 483
 484         return m_threads[index];
 485 }
 486
 487
 488 ////
 489 //// EmergeThread
 490 ////
 491
 492 EmergeThread::EmergeThread(Server *server, int ethreadid) :
 493         enable_mapgen_debug_info(false),
 494         id(ethreadid),
 495         m_server(server),
 496         m_map(NULL),
 497         m_emerge(NULL),
 498         m_mapgen(NULL)
 499 {
 500         m_name = "Emerge-" + itos(ethreadid);
 501 }
 502
 503
 504 EmergeThread::~EmergeThread()
 505 {
 506         //cancelPendingItems();
 507 }
 508
 509
 510 void EmergeThread::signal()
 511 {
 512         m_queue_event.signal();
 513 }
 514
 515
 516 bool EmergeThread::pushBlock(v3s16 pos)
 517 {
 518         m_block_queue.push(pos);
 519         return true;
 520 }
 521
 522
 523 void EmergeThread::cancelPendingItems()
 524 {
 525         MutexAutoLock queuelock(m_emerge->m_queue_mutex);
 526
 527         while (!m_block_queue.empty()) {
 528                 BlockEmergeData bedata;
 529                 v3s16 pos;
 530
 531                 pos = m_block_queue.front();
 532                 m_block_queue.pop();
 533
 534                 m_emerge->popBlockEmergeData(pos, &bedata);
 535
 536                 runCompletionCallbacks(pos, EMERGE_CANCELLED, bedata.callbacks);
 537         }
 538 }
 539
 540
 541 void EmergeThread::runCompletionCallbacks(
 542         v3s16 pos,
 543         EmergeAction action,
 544         const EmergeCallbackList &callbacks)
 545 {
 546         for (size_t i = 0; i != callbacks.size(); i++) {
 547                 EmergeCompletionCallback callback;
 548                 void *param;
 549
 550                 callback = callbacks[i].first;
 551                 param    = callbacks[i].second;
 552
 553                 callback(pos, action, param);
 554         }
 555 }
 556
 557
 558 bool EmergeThread::popBlockEmerge(v3s16 *pos, BlockEmergeData *bedata)
 559 {
 560         MutexAutoLock queuelock(m_emerge->m_queue_mutex);
 561
 562         if (m_block_queue.empty())
 563                 return false;
 564
 565         *pos = m_block_queue.front();
 566         m_block_queue.pop();
 567
 568         m_emerge->popBlockEmergeData(*pos, bedata);
 569
 570         return true;
 571 }
 572
 573
 574 EmergeAction EmergeThread::getBlockOrStartGen(
 575         v3s16 pos, bool allow_gen, MapBlock **block, BlockMakeData *bmdata)
 576 {
 577         MutexAutoLock envlock(m_server->m_env_mutex);
 578
 579         // 1). Attempt to fetch block from memory
 580         *block = m_map->getBlockNoCreateNoEx(pos);
 581         if (*block && !(*block)->isDummy() && (*block)->isGenerated())
 582                 return EMERGE_FROM_MEMORY;
 583
 584         // 2). Attempt to load block from disk
 585         *block = m_map->loadBlock(pos);
 586         if (*block && (*block)->isGenerated())
 587                 return EMERGE_FROM_DISK;
 588
 589         // 3). Attempt to start generation
 590         if (allow_gen && m_map->initBlockMake(pos, bmdata))
 591                 return EMERGE_GENERATED;
 592
 593         // All attempts failed; cancel this block emerge
 594         return EMERGE_CANCELLED;
 595 }
 596
 597
 598 MapBlock *EmergeThread::finishGen(v3s16 pos, BlockMakeData *bmdata,
 599         std::map<v3s16, MapBlock *> *modified_blocks)
 600 {
 601         MutexAutoLock envlock(m_server->m_env_mutex);
 602         ScopeProfiler sp(g_profiler,
 603                 "EmergeThread: after Mapgen::makeChunk", SPT_AVG);
 604
 605         /*
 606                 Perform post-processing on blocks (invalidate lighting, queue liquid
 607                 transforms, etc.) to finish block make
 608         */
 609         m_map->finishBlockMake(bmdata, modified_blocks);
 610
 611         MapBlock *block = m_map->getBlockNoCreateNoEx(pos);
 612         if (!block) {
 613                 errorstream << "EmergeThread::finishGen: Couldn't grab block we "
 614                         "just generated: " << PP(pos) << std::endl;
 615                 return NULL;
 616         }
 617
 618         v3s16 minp = bmdata->blockpos_min * MAP_BLOCKSIZE;
 619         v3s16 maxp = bmdata->blockpos_max * MAP_BLOCKSIZE +
 620                                  v3s16(1,1,1) * (MAP_BLOCKSIZE - 1);
 621
 622         // Ignore map edit events, they will not need to be sent
 623         // to anybody because the block hasn't been sent to anybody
 624         MapEditEventAreaIgnorer ign(
 625                 &m_server->m_ignore_map_edit_events_area,
 626                 VoxelArea(minp, maxp));
 627
 628         /*
 629                 Run Lua on_generated callbacks
 630         */
 631         try {
 632                 m_server->getScriptIface()->environment_OnGenerated(
 633                         minp, maxp, m_mapgen->blockseed);
 634         } catch (LuaError &e) {
 635                 m_server->setAsyncFatalError("Lua: " + std::string(e.what()));
 636         }
 637
 638         EMERGE_DBG_OUT("ended up with: " << analyze_block(block));
 639
 640         /*
 641                 Activate the block
 642         */
 643         m_server->m_env->activateBlock(block, 0);
 644
 645         return block;
 646 }
 647
 648
 649 void *EmergeThread::run()
 650 {
 651         DSTACK(FUNCTION_NAME);
 652         BEGIN_DEBUG_EXCEPTION_HANDLER
 653
 654         v3s16 pos;
 655
 656         m_map    = (ServerMap *)&(m_server->m_env->getMap());
 657         m_emerge = m_server->m_emerge;
 658         m_mapgen = m_emerge->m_mapgens[id];
 659         enable_mapgen_debug_info = m_emerge->enable_mapgen_debug_info;
 660
 661         try {
 662         while (!stopRequested()) {
 663                 std::map<v3s16, MapBlock *> modified_blocks;
 664                 BlockEmergeData bedata;
 665                 BlockMakeData bmdata;
 666                 EmergeAction action;
 667                 MapBlock *block;
 668
 669                 if (!popBlockEmerge(&pos, &bedata)) {
 670                         m_queue_event.wait();
 671                         continue;
 672                 }
 673
 674                 if (blockpos_over_limit(pos))
 675                         continue;
 676
 677                 bool allow_gen = bedata.flags & BLOCK_EMERGE_ALLOW_GEN;
 678                 EMERGE_DBG_OUT("pos=" PP(pos) " allow_gen=" << allow_gen);
 679
 680                 action = getBlockOrStartGen(pos, allow_gen, &block, &bmdata);
 681                 if (action == EMERGE_GENERATED) {
 682                         {
 683                                 ScopeProfiler sp(g_profiler,
 684                                         "EmergeThread: Mapgen::makeChunk", SPT_AVG);
 685                                 TimeTaker t("mapgen::make_block()");
 686
 687                                 m_mapgen->makeChunk(&bmdata);
 688
 689                                 if (enable_mapgen_debug_info == false)
 690                                         t.stop(true); // Hide output
 691                         }
 692
 693                         block = finishGen(pos, &bmdata, &modified_blocks);
 694                 }
 695
 696                 runCompletionCallbacks(pos, action, bedata.callbacks);
 697
 698                 if (block)
 699                         modified_blocks[pos] = block;
 700
 701                 if (modified_blocks.size() > 0)
 702                         m_server->SetBlocksNotSent(modified_blocks);
 703         }
 704         } catch (VersionMismatchException &e) {
 705                 std::ostringstream err;
 706                 err << "World data version mismatch in MapBlock " << PP(pos) << std::endl
 707                         << "----" << std::endl
 708                         << "\"" << e.what() << "\"" << std::endl
 709                         << "See debug.txt." << std::endl
 710                         << "World probably saved by a newer version of " PROJECT_NAME_C "."
 711                         << std::endl;
 712                 m_server->setAsyncFatalError(err.str());
 713         } catch (SerializationError &e) {
 714                 std::ostringstream err;
 715                 err << "Invalid data in MapBlock " << PP(pos) << std::endl
 716                         << "----" << std::endl
 717                         << "\"" << e.what() << "\"" << std::endl
 718                         << "See debug.txt." << std::endl
 719                         << "You can ignore this using [ignore_world_load_errors = true]."
 720                         << std::endl;
 721                 m_server->setAsyncFatalError(err.str());
 722         }
 723
 724         END_DEBUG_EXCEPTION_HANDLER
 725         return NULL;
 726 }