Add compat_checkrunawayscript

src/d_main.cpp

@@ -711,6 +711,7 @@ CVAR (Flag, compat_railing,				compatflags2, COMPATF2_RAILING);
 CVAR (Flag, compat_avoidhazard,			compatflags2, COMPATF2_AVOID_HAZARDS);
 CVAR (Flag, compat_stayonlift,			compatflags2, COMPATF2_STAYONLIFT);
 CVAR (Flag, compat_nombf21,				compatflags2, COMPATF2_NOMBF21);
+CVAR (Flag, compat_checkrunawayscript,	compatflags2, COMPATF2_CHECKRUNAWAYSCRIPT);
 
 CVAR(Bool, vid_activeinbackground, false, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
 
@@ -4029,4 +4030,4 @@ CCMD(type)
 		auto data = fileSystem.ReadFile(lump);
 		Printf("%.*s\n", data.size(), data.string());
 	}
-}
+}

src/doomdef.h

@@ -240,6 +240,7 @@ enum : unsigned int
 	COMPATF2_STAYONLIFT		= 1 << 13,	// yet another MBF thing.
 	COMPATF2_NOMBF21		= 1 << 14,	// disable MBF21 features that may clash with certain maps
 	COMPATF2_VOODOO_ZOMBIES = 1 << 15,	// [RL0] allow playerinfo, playerpawn, and voodoo health to all be different, and skip killing the player's mobj if a voodoo doll dies to allow voodoo zombies
+	COMPATF2_CHECKRUNAWAYSCRIPT = 1 << 16, // [TDRR] re-enables ACS script instruction limit
 
 };
 

src/playsim/p_acs.cpp

@@ -6964,7 +6964,7 @@ int DLevelScript::RunScript()
 
 	while (state == SCRIPT_Running)
 	{
-		if (++runaway > 2000000)
+		if ((++runaway > 2000000) && (Level->i_compatflags2 & COMPATF2_CHECKRUNAWAYSCRIPT))
 		{
 			Printf ("Runaway %s terminated\n", ScriptPresentation(script).GetChars());
 			state = SCRIPT_PleaseRemove;