I tried to compile a simple .gm6 file, and I got the below compiler feedback:

Sending Enigma resource names
Sending Enigma resource data
Executing Enigma...
Loaded fnames successfully.
Read 122 constants
Read 33 globals
Reading 1066 bytes of locals...
Read 1066 bytes of locals
Read locals successfully.
Opened file.
File is valid.
Read icon data.
Exported icon.
Read script names.
Read object names.
Read room names.
Read sprite names.
Wrote resource names.
Exported object switch.
Loaded and parsed all scripts.
"Link'd" all scripts.
Retrieved all script variables.
alarm[0]<=>fps*5; gravity<=>0î01; color<=>make_color_hsv(floor(random(240)),floor(random(240)),floor(random(240)));
nnnnn[0]<=>nnn*0; nnnnnnn<=>0.00; nnnnn<=>ffffffffffffff(fffff(ffffff(000)),fffff(ffffff(000)),fffff(ffffff(000)));

alarm[0]<=>fps*5;gravity<=>0î01;color<=>make_color_hsv(floor(random(240)),floor(random(240)),floor(random(240)));
nnnnn[0]<=>nnn*0;nnnnnnn<=>0.00;nnnnn<=>ffffffffffffff(fffff(ffffff(000)),fffff(ffffff(000)),fffff(ffffff(000)));

alarm[0]<=>fps*5;gravity<=>0î01;color<=>make_color_hsv(floor(random(240)),floor(random(240)),floor(random(240)));
nnnnn[0]<=>nnn*0;nnnnnnn<=>0.00;nnnnn<=>ffffffffffffff(fffff(ffffff(000)),fffff(ffffff(000)),fffff(ffffff(000)));

alarm[0]<=>fps*5;gravity<=>0î01;color<=>make_color_hsv(floor(random(240)),floor(random(240)),floor(random(240)));
nnnnn[0]<=>nnn*0;nnnnnnn<=>0.00;nnnnn<=>ffffffffffffff(fffff(ffffff(000)),fffff(ffffff(000)),fffff(ffffff(000)));

alarm[0]<=>fps*5;gravity<=>0î01;color<=>make_color_hsv(floor(random(240)),floor(random(240)),floor(random(240)));
nnnnn[0]<=>nnn*0;nnnnnnn<=>0.00;nnnnn<=>ffffffffffffff(fffff(ffffff(000)),fffff(ffffff(000)),fffff(ffffff(000)));

alarm[0]<=>fps*5;gravity<=>0î01;color<=>make_color_hsv(floor(random(240)),floor(random(240)),floor(random(240)));
nnnnn[0]<=>nnn*0;nnnnnnn<=>0.00;nnnnn<=>ffffffffffffff(fffff(ffffff(000)),fffff(ffffff(000)),fffff(ffffff(000)));



gravity_direction<=>random(10)/10;
nnnnnnnnnnnnnnnnn<=>ffffff(00)/00;

gravity_direction<=>random(10)/10;
nnnnnnnnnnnnnnnnn<=>ffffff(00)/00;

gravity_direction<=>random(10)/10;
nnnnnnnnnnnnnnnnn<=>ffffff(00)/00;

gravity_direction<=>random(10)/10;
nnnnnnnnnnnnnnnnn<=>ffffff(00)/00;

gravity_direction<=>random(10)/10;
nnnnnnnnnnnnnnnnn<=>ffffff(00)/00;

gravity_direction<=>random(10)/10;
nnnnnnnnnnnnnnnnn<=>ffffff(00)/00;



draw_set_color(color); draw_rectangle(x,y,x+16,y+16,false);
ffffffffffffff(nnnnn); ffffffffffffff(n,n,n+00,n+00,nnnnn);

draw_set_color(color);draw_rectangle(x,y,x+16,y+16,false);
ffffffffffffff(nnnnn);ffffffffffffff(n,n,n+00,n+00,nnnnn);

draw_set_color(color);draw_rectangle(x,y,x+16,y+16,false);
ffffffffffffff(nnnnn);ffffffffffffff(n,n,n+00,n+00,nnnnn);

draw_set_color(color);draw_rectangle(x,y,x+16,y+16,false);
ffffffffffffff(nnnnn);ffffffffffffff(n,n,n+00,n+00,nnnnn);

draw_set_color(color);draw_rectangle(x,y,x+16,y+16,false);
ffffffffffffff(nnnnn);ffffffffffffff(n,n,n+00,n+00,nnnnn);

draw_set_color(color);draw_rectangle(x,y,x+16,y+16,false);
ffffffffffffff(nnnnn);ffffffffffffff(n,n,n+00,n+00,nnnnn);



<if>(instance_count<lt>100000) <then>instance_create(random(room_width),random(room_height),obj_thingydo);
<if>(nnnnnnnnnnnnnn<lt>000000) <then>fffffffffffffff(ffffff(nnnnnnnnnn),ffffff(nnnnnnnnnnn),nnnnnnnnnnnn);

<if>(instance_count<lt>100000);<then>instance_create(random(room_width),random(room_height),obj_thingydo);
<if>(nnnnnnnnnnnnnn<lt>000000);<then>fffffffffffffff(ffffff(nnnnnnnnnn),ffffff(nnnnnnnnnnn),nnnnnnnnnnnn);

<if>(instance_count<lt>100000);<then>instance_create(random(room_width),random(room_height),obj_thingydo);
<if>(nnnnnnnnnnnnnn<lt>000000);<then>fffffffffffffff(ffffff(nnnnnnnnnn),ffffff(nnnnnnnnnnn),nnnnnnnnnnnn);

<if>(instance_count<lt>100000);<then>instance_create(random(room_width),random(room_height),obj_thingydo);
<if>(nnnnnnnnnnnnnn<lt>000000);<then>fffffffffffffff(ffffff(nnnnnnnnnn),ffffff(nnnnnnnnnnn),nnnnnnnnnnnn);

<if>(instance_count<lt>100000) <then>instance_create(random(room_width),random(room_height),obj_thingydo);
<if>(nnnnnnnnnnnnnn<lt>000000) <then>fffffffffffffff(ffffff(nnnnnnnnnn),ffffff(nnnnnnnnnnn),nnnnnnnnnnnn);

<if>(instance_count<lt>100000) <then>instance_create(random(room_width),random(room_height),obj_thingydo);
<if>(nnnnnnnnnnnnnn<lt>000000) <then>fffffffffffffff(ffffff(nnnnnnnnnn),ffffff(nnnnnnnnnnn),nnnnnnnnnnnn);



Loaded and parsed all events.
Read room data.
Wrote event declarations.
Wrote event code.
Wrote inherited locals.
Wrote with and script code.
Wrote mode data.
Wrote room data.
Starting compile. This may take a minute.
In file included from ENIGMAsystem\SHELL\SHELLmain.cpp:118:
ENIGMAsystem\SHELL\/Universal_System/events.h: In function `void ENIGMA_events()':
ENIGMAsystem\SHELL\/Universal_System/events.h:145: error: statement cannot resolve address of overloaded function
Compile failed. [1]
G++ error. Compile failed (-6)

The .gm6 in question was this:
http://willhostforfood.com/users/Retro/squares.gm6