[alasfourom]

Yeah, seems like using Chainsaw + Explosion with this method below , will make game crash when killing a witch, at least for windows

void Explosion(int client, float vPos[3])
{
	int entity = CreateEntityByName("prop_physics");
	if (!IsValidEntity(entity)) return;
	
	DispatchKeyValue(entity, "model", "models/props_junk/propanecanister001a.mdl");
	DispatchSpawn(entity);
	SetEntProp(entity, Prop_Send, "m_CollisionGroup", 1);
	TeleportEntity(entity, vPos, NULL_VECTOR, NULL_VECTOR);
	AcceptEntityInput(entity, "break");
}

Use this instead: Tested > Working Fine

PHP Code:

#pragma semicolon 1
#pragma newdecls required

#include <sourcemod>
#include <sdktools>

#define PLUGIN_VERSION "1.0"
#define SOUND "ambient/explosions/explode_1.wav"

ConVar g_Cvar_Enable;
ConVar g_Cvar_Damage;
ConVar g_Cvar_Radius;

public void OnPluginStart()
{
    CreateConVar ("l4d_witch_death_explosion_version", PLUGIN_VERSION, "l4d witch death explosion", FCVAR_SPONLY | FCVAR_NOTIFY | FCVAR_DONTRECORD);
    g_Cvar_Enable = CreateConVar("l4d_witch_death_explodsion_enable", "1", "Enable l4d2 witch death explosion", FCVAR_NOTIFY, true, 0.0, true, 1.0);
    g_Cvar_Damage = CreateConVar("l4d_witch_death_explodsion_damage", "20", "Set explosion damage after killing witches", FCVAR_NOTIFY);
    g_Cvar_Radius = CreateConVar("l4d_witch_death_explodsion_radius", "300", "Set explosion radius after killing witches", FCVAR_NOTIFY);
    AutoExecConfig(true, "l4d_witch_death_explosion");

    HookEvent("witch_killed", Event_WitchKilled);
}

public void OnMapStart()
{
    PrecacheSound(SOUND, false);
}

void Event_WitchKilled(Event event, const char[] name, bool dontBroadcast)
{
    float vPos[3];
    int witchid = event.GetInt("witchid");
    
    if(!IsValidEntity(witchid) || !g_Cvar_Enable.BoolValue) return;
    GetEntPropVector(witchid, Prop_Send, "m_vecOrigin", vPos);
    
    ExplosionEffect(vPos);
    PushForceEffect(vPos);
} 

// From Earendil: https://forums.alliedmods.net/showthread.php?p=2747814
void ExplosionEffect(float vPos[3])
{
    int entity = CreateEntityByName("env_explosion");
    
    TeleportEntity(entity, vPos, NULL_VECTOR, NULL_VECTOR);
    DispatchKeyValueFloat(entity, "iMagnitude", g_Cvar_Damage.FloatValue);
    DispatchKeyValueFloat(entity, "iRadiusOverride", g_Cvar_Radius.FloatValue);
    DispatchKeyValue(entity, "rendermode", "5");
    DispatchKeyValue(entity, "spawnflags", "128");
    DispatchKeyValue(entity, "fireballsprite", "sprites/zerogxplode.spr");
    DispatchSpawn(entity);
    
    SetVariantString("OnUser1 !self:Explode::0.01:1)");
    AcceptEntityInput(entity, "Addoutput");
    AcceptEntityInput(entity, "FireUser1");
    EmitSoundToAll(SOUND, _, SNDCHAN_AUTO, SNDLEVEL_RAIDSIREN, SND_NOFLAGS, SNDVOL_NORMAL, SNDPITCH_LOW, -1, NULL_VECTOR, NULL_VECTOR, true, 0.0);
}

void PushForceEffect(float vPos[3])
{
    float vTarg[3];
    for (int i = 1; i <= MaxClients; i++)
    {
        if(IsClientInGame(i) && IsPlayerAlive(i))
        {
            GetClientAbsOrigin(i, vTarg);
            if(GetVectorDistance(vPos, vTarg) <= g_Cvar_Radius.FloatValue)
                StaggerClient(GetClientUserId(i), vPos);
        }
    }
}

// From Silvers: https://forums.alliedmods.net/showthread.php?t=322063
void StaggerClient(int client, const float fPos[3])
{
    static int iScriptLogic = INVALID_ENT_REFERENCE;
    if(iScriptLogic == INVALID_ENT_REFERENCE || !IsValidEntity(iScriptLogic))
    {
        iScriptLogic = EntIndexToEntRef(CreateEntityByName("logic_script"));
        if(iScriptLogic == INVALID_ENT_REFERENCE || !IsValidEntity(iScriptLogic)) return;
        DispatchSpawn(iScriptLogic);
    }
    static char sBuffer[96];
    Format(sBuffer, sizeof(sBuffer), "GetPlayerFromUserID(%d).Stagger(Vector(%d,%d,%d))", client, RoundFloat(fPos[0]), RoundFloat(fPos[1]), RoundFloat(fPos[2]));
    SetVariantString(sBuffer);
    AcceptEntityInput(iScriptLogic, "RunScriptCode");
    RemoveEntity(iScriptLogic);
}