Hard Light Productions Forums
Modding, Mission Design, and Coding => The Scripting Workshop => Topic started by: Trivial Psychic on November 14, 2011, 08:28:49 pm
-
Howdy all:
I was building a mission for Inferno last night, and as a certain scripted, chain-reaction explosion occurred, the game froze and I was greeted by this error message:
LUA ERROR: [string "deto-sct.tbm - On Frame"]:12: attempt to call method 'lower' (a nil value)
------------------------------------------------------------------
ADE Debug:
------------------------------------------------------------------
Name: (null)
Name of: (null)
Function type: (null)
Defined on: 0
Upvalues: 0
Source: (null)
Short source:
Current line: 0
- Function line: 0
------------------------------------------------------------------
------------------------------------------------------------------
LUA Stack:
------------------------------------------------------------------
------------------------------------------------------------------
I asked my team-mates what this could mean, as my LUA knowledge is virtually nil value, ;) but I was suggested to ask in open forum, and so I do. Now, at the time, I was racing to evade an explosion which I knew was imminent, and was rear-viewing at the time. The explosion caused some severe buffeting to my fighter prior to the freeze. On a subsequent play-through, I kept on forward view and may have gotten some extra distance from the explosion, as I don't recall there being as much buffeting. In any case, I got no repeat of the freeze that time.
-
Well, it sounds like you have an error on the 12th line of your $On Frame: hook, in deto-sct.tbm, involving a function/method called "lower" which is nil (Lua's name for "null").
-
It would certainly help if we could see the script in question. Or if you could contact the scripts' original author. In other news, moved to modding, because this isn't a support topic.
-
call it as string.lower()
its part of the lua string library so it needs the "string." prefix.
-
Now, I already attempted to add "string." ahead of all instances of "lower()", as Nuke suggested, unfortunately, I was met with this error message:
LUA ERROR: [string "deto-sct.tbm - On Mission Start"]:11: function arguments expected near '.'
------------------------------------------------------------------
ADE Debug:
------------------------------------------------------------------
Name: (null)
Name of: (null)
Function type: (null)
Defined on: 0
Upvalues: 0
Source: (null)
Short source:
Current line: 0
- Function line: 0
------------------------------------------------------------------
------------------------------------------------------------------
LUA Stack:
------------------------------------------------------------------
------------------------------------------------------------------
and then if I continue:
deto-sct.tbm(line 579:
Error: Missing required token: [#End]. Found [$State: GS_STATE_GAME_PLAY] instead.
Then:
deto-sct.tbm(line 580:
Error: Missing required token: [#End]. Found [$On Frame:] instead.
And:
deto-sct.tbm(line 582:
Error: Missing required token: [#End]. Found [[] instead.
And:
deto-sct.tbm(line 584:
Error: Missing required token: [#End]. Found [f_M_time = mn.getMissionTime()] instead.
And:
deto-sct.tbm(line 586:
Error: Missing required token: [#End]. Found [if ((f_M_time ~= nil) and boolfl] instead.
It would certainly help if we could see the script in question. Or if you could contact the scripts' original author. In other news, moved to modding, because this isn't a support topic.
I'm not sure about the script's original author, but I consulted with the Inferno team and have received permission to post the file contents... mainly because no-one seems to know what it really does and who put it in.
#Conditional Hooks
$Application: FS2_Open
$On Mission Start:
[
----------------------
-- parser functions --
----------------------
--- get newline and make sure its lowercase
function get_next_line(nfile)
-- read the line
nline = nfile:read("*l")
-- change to lowercase
if nline ~= nil then
nline = nline:lower()
end
return nline
end
--- find keyword and return the place where it ends
function find_keyword(line_to_parse, keyword)
-- find any instances of the keyword
keyword = keyword:lower()
local key_s, key_e = line_to_parse:find(keyword)
-- if we cant find a thing
if key_s == nil then
return nil
end
-- check if the line has been commented away
local comment_s, comment_e = line_to_parse:find("--")
if comment_s == nil then
return key_e
elseif comment_s < key_s then
return nil
end
return key_e
end
--- function to initialize the vars
function init_entry(name)
arr_SD_rad[name] = 1
arr_SD_eff[name] = { }
arr_SD_m[name] = 1
arr_SF_rad[name] = 1
arr_SF_eff[name] = 0
arr_SB_int[name] = 0
arr_SB_dur[name] = 0
arr_SB_time[name] = 0
arr_SB_dist[name] = 1
end
--- specific parsing funcs to make things easier to read ---
--- string or rather substring parser
function parse_string(start_key, line_to_parse)
local substring = line_to_parse:sub(start_key)
-- remove empty spaces
local substring_start = substring:find("%a")
substring = substring:sub(substring_start)
return substring
end
--- function to parse numbers
function parse_number(start_key, line_to_parse)
local result = line_to_parse:sub(start_key)
local r_value = result:match('[0-9%.]+')
r_value = tonumber(r_value)
return r_value
end
--- function to parse arrays of numbers
function parse_number_array(start_key, line_to_parse)
-- stuff the array
local r = { }
local p
for p in line_to_parse:gmatch('[0-9%.]+') do
p = tonumber(p)
p = math.floor(p)
table.insert(r, p)
end
return r
end
--- function to parse things
function parse_entry(keyword, flashfile, type, use_same_line)
local new_entry = nil
local return_val
local return_array = {}
local c_line
if use_same_line == false then
c_line = get_next_line(flashfile)
if c_line == nil then
-- end of file
return -2, false, return_array
end
while c_line:len() == 0 do
c_line = get_next_line(flashfile)
if c_line == nil then
-- end of file
return -2, false, return_array
end
end
new_entry = find_keyword(c_line, "Name:")
current_start_line = c_line
else
c_line = use_same_line
end
-- check if we found a new entry
if new_entry == nil then
local c_key = find_keyword(c_line, keyword)
if c_key == nil then
-- we didn't find the thing...
return -1, c_line, return_array
end
if type == "n" then
-- soo... parse a number
return_val = parse_number(c_key, c_line)
return return_val, false, return_array
elseif type == "array_n" then
-- soo... parse an array of numbers
return_array = parse_number_array(c_key, c_line)
return_val = #return_array
return return_val, false, return_array
end
else
-- found new entry instead...
return -2, c_line, return_array
end
end
-----------------------------------------------
-- loading the flash animations
function parse_flash_ani_file(n_file)
local something_to_parse = true
while something_to_parse == true do
local c_line = get_next_line(n_file)
-- if we are at end of file, stop the loop
if c_line == nil then
something_to_parse = false
break
end
local entry_start = find_keyword(c_line, "Filename:")
-- if we found something else, try next line
if entry_start ~= nil then
-- ok... so we should have a good entry candidate and all that
local current_entry = parse_string(entry_start, c_line)
local animation = gr.loadTexture(current_entry, true)
table.insert(arr_D_eff, animation)
if animation:isValid() == false then
ba.warning("Animation defined in " .. filename_flashani .. " " .. current_entry .. " is invalid")
end
end
end
end
-- actual flash effect parsing function
function parse_flash_file(flashfile)
-- pick first line
entries_left = true
use_same_line = false
while entries_left == true do
-- find ship name
if use_same_line == false then
use_same_line = get_next_line(flashfile)
end
if use_same_line == nil then
-- end of file
entries_left = false
break
end
if use_same_line:len() == 0 then
use_same_line = false
else
entry_start = find_keyword(use_same_line, "Name:")
current_start_line = use_same_line
if entry_start ~= nil then
local not_new_entry = false
-- insert while loop here to enable breaks as next statements
while entry_start ~= nil do
if not_new_entry == false then
current_entry = parse_string(entry_start, use_same_line)
-- init the entry
init_entry(current_entry)
use_same_line = false
ba.print("\nClass: " .. current_entry .. "\n")
end
local temp_val = nil
local temp_arr = nil
entry_start = nil
-- detonation radius
temp_val, use_same_line = parse_entry("Detonation Radius Multiplier:", flashfile, "n", use_same_line)
if temp_val == -2 then
break
elseif temp_val ~= -1 then
ba.print("DRM: " .. temp_val .. "\n")
arr_SD_rad[current_entry] = temp_val
end
-- random detonation effects
local temp_arr = {}
temp_val, use_same_line, temp_arr = parse_entry("Detonation Effects:", flashfile, "array_n", use_same_line)
if temp_val == -2 then
break
elseif temp_val ~= -1 then
ba.print("DE: " .. temp_val .. "\n")
arr_SD_eff[current_entry] = temp_arr
end
-- multiplier for the detonation occurrance
temp_val, use_same_line = parse_entry("Detonation Multiplier:", flashfile, "n", use_same_line)
if temp_val == -2 then
break
elseif temp_val ~= -1 then
ba.print("DM: " .. temp_val .. "\n")
arr_SD_m[current_entry] = temp_val
end
-- final flash radius
temp_val, use_same_line = parse_entry("Flash Radius Multiplier:", flashfile, "n", use_same_line)
if temp_val == -2 then
break
elseif temp_val ~= -1 then
ba.print("FRM: " .. temp_val .. "\n")
arr_SF_rad[current_entry] = temp_val
end
-- flash effect
temp_val, use_same_line = parse_entry("Flash Effect:", flashfile, "n", use_same_line)
if temp_val == -2 then
break
elseif temp_val ~= -1 then
ba.print("FE: " .. temp_val .. "\n")
math.floor(temp_val)
arr_SF_eff[current_entry] = temp_val
end
-- blinding effect
temp_val, use_same_line = parse_entry("Blinding Effect Intensity:", flashfile, "n", use_same_line)
if temp_val == -2 then
break
elseif temp_val ~= -1 then
ba.print("BE: " .. temp_val .. "\n")
temp_val = temp_val + "0"
if temp_val < 0 then
temp_val = 0
elseif temp_val > 100 then
temp_val = 100
end
arr_SB_int[current_entry] = temp_val
end
-- blinding duration
temp_val, use_same_line = parse_entry("Blinding Effect Duration:", flashfile, "n", use_same_line)
if temp_val == -2 then
break
elseif temp_val ~= -1 then
ba.print("BEDu: " .. temp_val .. "\n")
arr_SB_dur[current_entry] = temp_val
end
-- blast effect delay
temp_val, use_same_line = parse_entry("Blast Effect Delay:", flashfile, "n", use_same_line)
if temp_val == -2 then
break
elseif temp_val ~= -1 then
ba.print("BEDe: " .. temp_val .. "\n")
arr_SB_time[current_entry] = temp_val
end
-- blast effect delay
temp_val, use_same_line = parse_entry("Blinding Effect Distance Multiplier:", flashfile, "n", use_same_line)
if temp_val == -2 then
break
elseif temp_val ~= -1 then
ba.print("BEDM: " .. temp_val .. "\n")
arr_SB_dist[current_entry] = temp_val
end
if current_start_line == use_same_line then
use_same_line = get_next_line(flashfile)
local temp_string = find_keyword(use_same_line, "Name:")
if temp_string == nil then
current_start_line = use_same_line
entry_start = use_same_line
else
entry_start = nil
end
not_new_entry = true
end
end
else
use_same_line = get_next_line(flashfile)
end
end
end
end
----------
-- main --
----------
-- init arrays
arrayShipName = {}
arr_SD_rad = {}
arr_SD_eff = {}
arr_SD_m = {}
arr_SF_rad = {}
arr_SF_eff = {}
arr_SB_int = {}
arr_SB_dur = {}
arr_SB_time = {}
arr_SB_dist = {}
arr_D_eff = {}
-- open reference file, if any
-- if failed... pass the script
filename_flash = "exp_flashes.cfg"
filename_flashani = "exp_ani_flashes.cfg"
if ((cf.fileExists(filename_flash, "data/config/", true) == true) and (cf.fileExists(filename_flashani, "data/config/", true) == true)) then
boolflashfileOK = true
end
if boolflashfileOK then
-- open to read the contents
flashanifile = cf.openFile(filename_flashani, "r")
-- parse contents
parse_flash_ani_file(flashanifile)
-- close the file
flashanifile:close()
-- continue with the rest in similar manner
flashfile = cf.openFile(filename_flash, "r")
parse_flash_file(flashfile)
flashfile:close()
-- setup rest of the required stuff
math.randomseed( os.time() )
f_counter = {}
v_null = ba.createVector(0,0,0)
v_temp = ba.createVector(0,0,0)
v_rnd_sphere = ba.createVector(0,0,0)
arr_FS_List = {}
arr_FS = {}
arr_FS_Class = {}
arr_FS_Pos = {}
arr_FS_done = {}
arr_FS_time = {}
bl_int = 0
bl_end = 0
bl_max = 0
bl_start = 0
bl_int_init = 0
else
ba.warning("Failed to initialize flashy deaths script")
end
----------------------------------
-- functions for later sections --
----------------------------------
function blinding_effect(intensity, duration, time)
bl_int_init = bl_int
if (intensity < bl_max) then
if intensity > bl_int then
local effect_time = bl_end - bl_start
local delta_time = time - bl_start
if effect_time == 0 then
bl_max = intensity
bl_start = time
bl_end = time + (duration / 1000)
else
local pct_time = (effect_time - delta_time) / effect_time
if pct_time < 0.85 then
bl_max = intensity
bl_start = time
bl_end = time + (duration / 1000)
end
end
end
else
bl_max = intensity
bl_start = time
bl_end = time + (duration / 1000)
end
end
function process_blinding_effect_frame(time)
if bl_max == 0 then
return
end
local effect_time = bl_end - bl_start
local delta_time = time - bl_start
local pct_time = (effect_time - delta_time) / effect_time
local case_time
-- lets go case by case
if pct_time < 0.0 then
-- effect has faded away
bl_int = 0
bl_max = 0
blindint_intensity_start = 0
elseif pct_time < 0.85 then
-- effect is still fading away
case_time = 1 - (pct_time / 0.85)
bl_int = bl_max * math.pow(((1 + math.cos(case_time * math.pi))/2),3)
elseif pct_time > 0.90 then
-- effect is still getting stronger
if pct_time == 0 then
case_time = -1
else
case_time = -1 * ((pct_time - 0.9) / 0.1)
end
bl_int = math.pow(((1 + math.cos(case_time * math.pi))/2),2) * (bl_max - bl_int_init) + bl_int_init
else
bl_int = bl_max
end
if bl_int ~= 0 then
a = bl_int * 255
gr.flashScreen(a,a,a)
end
end
function do_death_flash(name, number)
-- death flash explosion
arr_FS_List[name] = 2
local v_F_pos = arr_FS_Pos[name]
arr_FS_Pos[name] = nil
local str_F_class = arr_FS_Class[name]
arr_FS_Class[name] = nil
local l_f_model_r = tb.ShipClasses[str_F_class].Model.Radius
local n_F_rad = 1.5 * (math.random() + 0.5) * l_f_model_r * arr_SF_rad[str_F_class]
local l_anim_flash = arr_D_eff[arr_SF_eff[str_F_class]]
if l_anim_flash:isValid() then
ts.createParticle(v_F_pos,v_null,f_F_time,n_F_rad,PARTICLE_BITMAP,-1,false,l_anim_flash)
end
-- death flash blinding effect
if arr_SB_int[str_F_class] > 0 then
local coord_x
local coord_y
coord_x, coord_y = v_F_pos:getScreenCoords()
if coord_x ~= false then
local l_f_dist_mult = 1
local l_player = hv.Player
if l_player:isValid() then
local l_v_plr_pos = l_player.Position
local l_n_distace_fls_plr = v_F_pos:getDistance(l_v_plr_pos)
local l_n_max_fls_distance = 2 * l_f_model_r * arr_SB_dist[str_F_class]
if l_n_distace_fls_plr > l_n_max_fls_distance then
local l_n_exp_dist_mult = l_n_distace_fls_plr / l_n_max_fls_distance
l_f_dist_mult = 1 / math.pow(l_n_exp_dist_mult, 2)
end
blinding_effect(arr_SB_int[str_F_class] * l_f_dist_mult, arr_SB_dur[str_F_class], f_M_time)
end
end
end
-- purge from the list
table.insert(arr_FS_done, number)
end
function check_flash(name)
local class = arr_FS_Class[name]
if arr_SB_time[class] > 0 then
if arr_FS_time[name] <= f_M_time then
return true;
end
end
return false;
end
function add_to_flash_list(name, class)
arr_FS_List[name] = 1
arr_FS_Class[name] = class
if arr_SB_time[class] > 0 then
local temp_time = math.random() + 1
arr_FS_time[name] = arr_SB_time[class] * temp_time / 1000 + f_M_time
end
table.insert(arr_FS,name)
end
function get_rnd_vector_sphere()
local l_bool_ok_to_pass = false
local l_get_rnd = math.random
while (l_bool_ok_to_pass == false) do
-- get random vector (cube, -1 to 1)
v_rnd_sphere[1] = (2* (l_get_rnd() - 0.5))
v_rnd_sphere[2] = (2* (l_get_rnd() - 0.5))
v_rnd_sphere[3] = (2* (l_get_rnd() - 0.5))
local l_n_mag = v_rnd_sphere:getMagnitude()
-- accept only values within a sphere (uniform)
if l_n_mag <= 1 then
v_rnd_sphere = v_rnd_sphere / l_n_mag
l_bool_ok_to_pass = true
end
end
return v_rnd_sphere;
end
function get_ray_collision_pos(ship, v_ray, num_tries)
local l_or_ship = ship.Orientation
local l_m_model = ship.Class.Model
local l_f_radius = 30000
local l_v_pos_mod = v_null
local l_n_has_tried = 0
local l_c_ray_pos
local l_get_rnd = math.random
while (l_n_has_tried < num_tries) do
if l_m_model:isValid() then
l_f_radius = l_m_model.Radius
for i=1,3 do
local l_rnd = (2* (l_get_rnd() - 0.5))
if l_rnd >= 0 then
v_temp[i] = l_m_model.BoundingBoxMax[i] * l_rnd
else
v_temp[i] = l_m_model.BoundingBoxMin[i] * l_rnd * (-1)
end
end
l_v_pos_mod = l_or_ship:unrotateVector(v_temp)
else
l_v_pos_mod = v_null
end
local v_ray = v_ray * l_f_radius
local l_v_end_pos = ship.Position - v_ray + l_v_pos_mod
local l_v_start_pos = ship.Position + v_ray + l_v_pos_mod
l_c_ray_pos = ship:checkRayCollision(l_v_start_pos, l_v_end_pos)
if l_c_ray_pos ~= nil then
l_n_has_tried = 3
else
l_n_has_tried = 1 + l_n_has_tried
end
end
return l_c_ray_pos
end
function get_number_of_explosions(attempts)
local l_n_partials
local l_n_full
l_n_full, l_n_partials = math.modf(attempts)
if l_n_partials ~= 0 then
if math.random() > l_n_partials then
l_n_full = l_n_full + 1
end
end
return l_n_full
end
]
$State: GS_STATE_GAME_PLAY
$On Frame:
[
f_M_time = mn.getMissionTime()
if ((f_M_time ~= nil) and boolflashfileOK) then
f_F_time = ba.getFrametime(true)
f_rnd = math.random()
n_ships = #mn.Ships
for h = 1, n_ships do
o_ship = mn.Ships[h]
str_S_class = o_ship.Class.Name:lower()
--ONLY SHIPS WITH EFFECTS--
if ((arr_SF_rad[str_S_class] ~= nil) and (arr_SD_rad[str_S_class] ~= nil)) then
str_S_name = o_ship.Name
floatHP = o_ship.HitpointsLeft
if floatHP <= 0 then
v_S_pos = o_ship.Position
if arr_SF_rad[str_S_class] > 0 then
if arr_FS_List[str_S_name] == nil then
add_to_flash_list(str_S_name, str_S_class)
end
end
if arr_SD_rad[str_S_class] > 0 then
arr_FS_Pos[str_S_name] = v_S_pos
if f_counter[str_S_name] == nil then
f_counter[str_S_name] = 0
end
f_rnd = math.random()
local l_n_SD_eff = #arr_SD_eff[str_S_class]
while f_counter[str_S_name] > f_rnd do
f_counter[str_S_name] = f_counter[str_S_name] - f_rnd
local n_attempts = get_number_of_explosions(arr_SD_m[str_S_class])
for n = 1,n_attempts do
local l_bool_ok_to_pass = false
local l_v_rnd = get_rnd_vector_sphere()
local l_c_pos = get_ray_collision_pos(o_ship, l_v_rnd, 3)
-- check if the ray actually hit anything even after three tries
if l_c_pos ~= nil then
local l_m_model = o_ship.Class.Model
local l_f_det_r = (2* math.random() + 0.5) * l_m_model.Radius * arr_SD_rad[str_S_class] * 0.1
local l_arr_SD_eff = arr_SD_eff[str_S_class]
if l_n_SD_eff == 1 then
local l_anim_det = arr_D_eff[l_arr_SD_eff[1]]
if l_anim_det:isValid() then
ts.createParticle(l_c_pos,v_null,f_F_time,l_f_det_r,PARTICLE_BITMAP,-1,false,l_anim_det)
end
elseif l_n_SD_eff > 1 then
local l_n_rnd_id = math.random(l_n_SD_eff)
local l_anim_det = arr_D_eff[l_arr_SD_eff[l_n_rnd_id]]
if l_anim_det:isValid() then
ts.createParticle(l_c_pos,v_null,f_F_time,l_f_det_r,PARTICLE_BITMAP,-1,false,l_anim_det)
end
end
end
end
if f_counter[str_S_name] <= 0 then
f_counter[str_S_name] = 0
else
f_rnd = math.random()
end
end
f_counter[str_S_name] = f_counter[str_S_name] + f_F_time
end
end
end
n_FS = #arr_FS
for x=1,n_FS do
name = arr_FS[x]
if arr_FS_List[name] == 1 then
if mn.Ships[name]:isValid() then
if mn.Ships[name]:hasShipExploded() == 2 then
do_death_flash(name, x)
else
-- randomized flash explosion
if check_flash(name) == true then
do_death_flash(name, x)
end
end
end
end
end
n_FS_done = #arr_FS_done
if n_FS_done > 0 then
for o=n_FS_done,1,-1 do
table.remove(arr_FS,arr_FS_done[o])
end
arr_FS_done = nil
arr_FS_done = {}
end
end
process_blinding_effect_frame(f_M_time)
end
]
$Application: FS2_Open
$On Mission End:
[
-- kill the arrays...
if boolflashfileOK then
arrayShipName = nil
arr_SD_rad = nil
arr_SD_eff = nil
arr_SF_rad = nil
arr_SF_eff = nil
arr_SB_int = nil
arr_SB_dur = nil
arr_SB_time = nil
local n_effects = #arr_D_eff
for j=1,n_effects do
arr_D_eff[j]:unload()
end
arr_D_eff = nil
f_counter = nil
arr_FS_List = nil
arr_FS = nil
arr_FS_Class = nil
arr_FS_Pos = nil
arr_FS_done = nil
arr_FS_time = nil
boolflashfileOK = nil
end
]
#End
-
It seems you are using an old version of the flashy explosions script. You should update to the version used in the mediavps.
-
Unless some one seriously revamped the script that should not matter.
It seems to be failing on
str_S_class = o_ship.Class.Name:lower()Which is rather surprising, assuming all ship classes have names.
Adding there a string. does not help at all, it is legal in lua to use <string>:lower() instead of string.lower(<string>) calls just as well. Problem however is that not related (directly to that). For some reason ship classes name string does not seem to be valid (ie. gave nil).
You could try using
str_S_class = string.lower(o_ship.Class.Name)instead of
str_S_class = o_ship.Class.Name:lower()
Still got to think a bit for the actual cause of the problem.
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did the script make sure the ship was valid?
i think stringvar:lower() is acceptable, but i usually do string.lower(stringvar) instead. either one is legal though. but if stringvar is any type other than string you will get an error. i like to do something like:
if type(stringvar) == "string" then stringvar = string.lower(stringvar) end
thats the surefire, but expensive, way to make sure your stringvar is actually a string. but something like this:
if string then stringvar = string.lower(stringvar) end
might work so long as you make sure its either gonna be string or nil, in some cases it may end up being some other type, like a number (getting a boolean can be mis-interpreted either way and its something to watch out for), and that would be bad.
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It should be
n_ships = #mn.Ships
for h = 1, n_ships do
o_ship = mn.Ships[h]
str_S_class = o_ship.Class.Name:lower()
Or that at least seems to be spot reported initially
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It seems you are using an old version of the flashy explosions script. You should update to the version used in the mediavps.
The team has now updated to the file from MV_Effects.3612, but I'm still getting the crash. :confused:
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Unless some one seriously revamped the script that should not matter.
Do you use templates? Do you use oddly named ship classes? Have you run debugger?
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It would appear that the script has nothing to do with my issue. I even deleted the file, tested the mission, and encountered the same crash. I even tried shooting out all the exploding items before the event to destroy them would trigger. I experienced no crashes at these. What I did get the crash on however, was a ship arrival that was triggered to occur right afterwards. I expect that I'm trying to trigger a sequence of events that creates a logic loop or something, which the debugger isn't configured to look for.