ERROR Unable to get the group 'GROUP_ROTTING_PLANT'

[matt32106]

Describe the bug

Debug message after moving at the edge of a forest.

Steps To Reproduce

Unknown, same movement does not trigger the message again.

Expected behavior

N/A

Screenshots

N/A

Versions and configuration

- OS: Linux
    - OS Version: LSB Version: core-9.20170808ubuntu1-noarch:printing-9.20170808ubuntu1-noarch:security-9.20170808ubuntu1-noarch; Distributor ID: Ubuntu; Description: Ubuntu 18.04.4 LTS; Release: 18.04; Codename: bionic; 
- Game Version: 0.E-238-g6393a6d [64-bit]
- Graphics Version: Tiles
- Game Language: English [en]
- Mods loaded: [
    Dark Days Ahead [dda],
    Disable NPC Needs [no_npc_food],
    Stats Through Skills [StatsThroughSkills]
]

Additional context

-----------------------------------------
12:13:03.021 : Starting log.
12:13:03.065 INFO : Cataclysm DDA version 0.E-238-g6393a6d
12:13:03.065 INFO : SDL version used during compile is 2.0.4
12:13:03.067 INFO : SDL version used during linking and in runtime is 2.0.8
12:13:03.734 INFO : Number of render drivers on your system: 3
12:13:03.734 INFO : Render driver: 0/opengl
12:13:03.734 INFO : Render driver: 1/opengles2
12:13:03.734 INFO : Render driver: 2/software
12:13:03.832 INFO : Active renderer: 1/opengles2
12:13:04.060 INFO : USE_COLOR_MODULATED_TEXTURES is set to 1
12:13:04.061 INFO : generate_alt_rect_texture() = FAIL. alt_rect_tex_enabled = 1
12:13:05.238 INFO : Language is set to: 'en'
12:13:08.327 WARNING : opendir [./mods/] failed with "No such file or directory".
12:13:35.290 WARNING : opendir [./save/Rockypoint/mods] failed with "No such file or directory".
12:13:43.652 INFO : Loaded tileset: UNDEAD_PEOPLE
13:19:03.101 ERROR : (error message will follow backtrace)
    ./cataclysm-tiles(_Z21debug_write_backtraceRSo+0x38) [0xa3bc15]
    ./cataclysm-tiles(_Z8DebugLog10DebugLevel10DebugClass+0x1e1) [0xa3c8ad]
    ./cataclysm-tiles(_Z12realDebugmsgPKcS0_S0_RKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE+0xb0) [0xa3d55f]
    ./cataclysm-tiles(_Z12realDebugmsgIJPKcEEvS1_S1_S1_S1_DpOT_+0xe0) [0x8b617a]
    ./cataclysm-tiles(_ZN19MonsterGroupManager15GetMonsterGroupERK9string_idI12MonsterGroupE+0x8e) [0xe04130]
    ./cataclysm-tiles(_ZN19MonsterGroupManager23GetUpgradedMonsterGroupERK9string_idI12MonsterGroupE+0x1b) [0xe042d3]
    ./cataclysm-tiles(_ZN19MonsterGroupManager18GetResultFromGroupERK9string_idI12MonsterGroupEPi+0x32) [0xe043cc]
    ./cataclysm-tiles(_ZN3map17rotten_item_spawnERK4itemRK8tripoint+0xf6) [0xcd08a6]
    ./cataclysm-tiles(_ZN3map19remove_rotten_itemsIN4cata6colonyI4itemSaIS3_EtEEEEvRT_RK8tripoint+0x84) [0xcf0858]
    ./cataclysm-tiles(_ZN3map9actualizeERK8tripoint+0x18d) [0xcdbcbd]
    ./cataclysm-tiles(_ZN3map5loadnERK8tripointb+0x5df) [0xcdce6b]
    ./cataclysm-tiles(_ZN3map5shiftERK5point+0x589) [0xcdd465]
    ./cataclysm-tiles(_ZN4game10update_mapERiS0_+0x186) [0xaf3d2a]
    ./cataclysm-tiles(_ZN4game10update_mapER6player+0x4b) [0xaf488b]
    ./cataclysm-tiles(_ZN4game12place_playerERK8tripoint+0xf52) [0xaf60a2]
    ./cataclysm-tiles(_ZN4game9walk_moveERK8tripoint+0x14fd) [0xafb94f]
    ./cataclysm-tiles(_ZN13avatar_action4moveER6avatarR3mapiii+0xded) [0x92c110]
    ./cataclysm-tiles(_ZN4game13handle_actionEv+0x15ee) [0xb3be72]
    ./cataclysm-tiles(_ZN4game7do_turnEv+0x4a6) [0xafeaa4]
    ./cataclysm-tiles(main+0x132b) [0x80f157]

    Attempting to repeat stack trace using debug symbols…
    debug_write_backtrace(std::ostream&)
    ??:?
    DebugLog(DebugLevel, DebugClass)
    ??:?
    realDebugmsg(char const*, char const*, char const*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)
    ??:?
    void realDebugmsg<char const*>(char const*, char const*, char const*, char const*, char const*&&)
    ??:?
    MonsterGroupManager::GetMonsterGroup(string_id<MonsterGroup> const&)
    ??:?
    MonsterGroupManager::GetUpgradedMonsterGroup(string_id<MonsterGroup> const&)
    ??:?
    MonsterGroupManager::GetResultFromGroup(string_id<MonsterGroup> const&, int*)
    ??:?
    map::rotten_item_spawn(item const&, tripoint const&)
    ??:?
    void map::remove_rotten_items<cata::colony<item, std::allocator<item>, unsigned short> >(cata::colony<item, std::allocator<item>, unsigned short>&, tripoint const&)
    ??:?
    map::actualize(tripoint const&)
    ??:?
    map::loadn(tripoint const&, bool)
    ??:?
    map::shift(point const&)
    ??:?
    game::update_map(int&, int&)
    ??:?
    game::update_map(player&)
    ??:?
    game::place_player(tripoint const&)
    ??:?
    game::walk_move(tripoint const&)
    ??:?
    avatar_action::move(avatar&, map&, int, int, int)
    ??:?
    game::handle_action()
    ??:?
    game::do_turn()
    ??:?
    main
    ??:?
Backtrace emission took 0 seconds.
src/mongroup.cpp:252 [static const MonsterGroup& MonsterGroupManager::GetMonsterGroup(const mongroup_id&)] Unable to get the group 'GROUP_ROTTING_PLANT'