diff --git a/src/nhlua.c b/src/nhlua.c
index 1347fc3ac..494b1d265 100644
--- a/src/nhlua.c
+++ b/src/nhlua.c
@@ -789,6 +789,7 @@ traceback_handler(L)
 lua_State *L;
 {
     luaL_traceback(L, L, lua_tostring(L, 1), 0);
+    /* TODO: call impossible() if fuzzing? */
     return 1;
 }
 
diff --git a/src/sp_lev.c b/src/sp_lev.c
index 2a4e13b79..cb35286ed 100644
--- a/src/sp_lev.c
+++ b/src/sp_lev.c
@@ -216,7 +216,6 @@ xchar x1, y1, x2, y2;
 int prop;
 {
     register xchar x, y;
-    /* struct rm *lev; */   /* REVIEW: unreferenced */
 
     x1 = max(x1, 1);
     x2 = min(x2, COLNO - 1);
@@ -2361,7 +2360,7 @@ get_table_montype(L)
 lua_State *L;
 {
     char *s = get_table_str_opt(L, "id", NULL);
-    int ret = NON_PM /*, i */   /* REVIEW: unreferenced */;
+    int ret = NON_PM;
 
     if (s) {
         ret = find_montype(L, s);
@@ -2892,11 +2891,9 @@ lua_State *L;
     long ecoord;
     const char *const engrtypes[] = { "dust", "engrave", "burn", "mark", "blood", NULL };
     const int engrtypes2i[] = { DUST, ENGRAVE, BURN, MARK, ENGR_BLOOD, 0 };
-    xchar x, y;
+    xchar x = -1, y = -1;
     int argc = lua_gettop(L);
 
-    x = y = 0;      /* FIXME: quiet a warning for else clause below.
-                        should it actually be -1? */
     create_des_coder();
 
     if (argc == 1) {
@@ -2915,8 +2912,6 @@ lua_State *L;
         txt = dupstr(luaL_checkstring(L, 3));
     } else {
         nhl_error(L, "Wrong parameters");
-        /* FIXME: this clause left etyp uninitialized so initialization
-           to DUST was added above to quiet a macosx warning */
     }
 
     if (x == -1 && y == -1)
@@ -3168,7 +3163,7 @@ lua_State *L;
     const int stairdirs2i[] = { 0, 1 };
 
     long scoord;
-    int ax = -1, ay = -1;   /* FIXME: initializers added, macosx warning */
+    int ax = -1, ay = -1;
     int up;
     int ltype = lua_type(L, 1);
 
@@ -3331,7 +3326,8 @@ const struct {
                    { "anti magic", ANTI_MAGIC },
                    { "polymorph", POLY_TRAP },
                    { "vibrating square", VIBRATING_SQUARE },
-                   { 0, 0 } };
+                   { "random", -1 },
+                   { 0, NO_TRAP } };
 
 int
 get_table_traptype_opt(L, name, defval)
@@ -3352,6 +3348,19 @@ int defval;
     return defval;
 }
 
+int
+get_traptype_byname(trapname)
+char *trapname;
+{
+    int i;
+
+    for (i = 0; trap_types[i].name; i++)
+        if (!strcmpi(trapname, trap_types[i].name))
+            return trap_types[i].type;
+
+    return NO_TRAP;
+}
+
 /* trap({ type = "hole", x = 1, y = 1 }); */
 /* trap("hole", 3, 4); */
 /* trap("level teleport", {5, 8}); */
@@ -3363,49 +3372,27 @@ lua_State *L;
 {
     spltrap tmptrap;
     int x, y;
-    /* long tcoord; */   /* REVIEW: unreferenced */
     int argc = lua_gettop(L);
 
     create_des_coder();
 
     if (argc == 1 && lua_type(L, 1) == LUA_TSTRING) {
         const char *trapstr = luaL_checkstring(L, 1);
-        int i;
 
-        tmptrap.type = -1;
-        for (i = 0; trap_types[i].name; i++)
-            if (!strcmpi(trapstr, trap_types[i].name)) {
-                tmptrap.type = trap_types[i].type;
-                break;
-            }
+        tmptrap.type = get_traptype_byname(trapstr);
         x = y = -1;
     } else if (argc == 2 && lua_type(L, 1) == LUA_TSTRING
                && lua_type(L, 2) == LUA_TTABLE) {
         const char *trapstr = luaL_checkstring(L, 1);
-        int i;
 
-        tmptrap.type = -1;
-        for (i = 0; trap_types[i].name; i++)
-            if (!strcmpi(trapstr, trap_types[i].name)) {
-                tmptrap.type = trap_types[i].type;
-                break;
-            }
+        tmptrap.type = get_traptype_byname(trapstr);
         get_coord(L, 2, &x, &y);
     } else if (argc == 3) {
         const char *trapstr = luaL_checkstring(L, 1);
-        int i;
-        tmptrap.type = -1;
-        for (i = 0; trap_types[i].name; i++)
-            if (!strcmpi(trapstr, trap_types[i].name)) {
-                tmptrap.type = trap_types[i].type;
-                break;
-            }
+
+        tmptrap.type = get_traptype_byname(trapstr);
         x = luaL_checkinteger(L, 2);
         y = luaL_checkinteger(L, 3);
-
-        if (tmptrap.type == -1)
-            nhl_error(L, "Unknown trap type");
-
     } else {
         lcheck_param_table(L);
 
@@ -3420,6 +3407,9 @@ lua_State *L;
         }
     }
 
+    if (tmptrap.type == NO_TRAP)
+        nhl_error(L, "Unknown trap type");
+
     if (x == -1 && y == -1)
         tmptrap.coord = SP_COORD_PACK_RANDOM(0);
     else
@@ -4328,11 +4318,12 @@ lua_State *L;
 {
     terrain tmpterrain;
     xchar x, y;
-    /* char *ter; */   /* REVIEW: unreferenced */
     struct selectionvar *sel = NULL;
     int argc = lua_gettop(L);
 
     create_des_coder();
+    tmpterrain.tlit = 0;
+    tmpterrain.ter = INVALID_TYPE;
 
     if (argc == 1) {
         lcheck_param_table(L);
@@ -4357,12 +4348,10 @@ lua_State *L;
     } else if (argc == 2) {
         sel = l_selection_check(L, 1);
         tmpterrain.ter = check_mapchr(luaL_checkstring(L, 2));
-        tmpterrain.tlit = luaL_optinteger(L, 3, 0); /* FIXME: this can never be here, argc==2 */
     } else if (argc == 3) {
         x = luaL_checkinteger(L, 1);
         y = luaL_checkinteger(L, 2);
         tmpterrain.ter = check_mapchr(luaL_checkstring(L, 3));
-        tmpterrain.tlit = 0;
     } else {
         nhl_error(L, "wrong parameters");
     }
@@ -4390,7 +4379,6 @@ lspo_replace_terrain(L)
 lua_State *L;
 {
     replaceterrain rt;
-    /* char *toter, *fromter; */   /* REVIEW: unreferenced */
     xchar totyp, fromtyp;
 
     create_des_coder();
@@ -4571,8 +4559,7 @@ const char *name;
 int *x1, *y1, *x2, *y2;
 boolean optional;
 {
-    int arrlen /*, i*/   /* REVIEW: unreferenced */;
-    /* int retvals[4]; */   /* REVIEW: unreferenced */
+    int arrlen;
 
     lua_getfield(L, 1, name);
     if (optional && lua_type(L, -1) == LUA_TNIL) {
@@ -4904,7 +4891,6 @@ lua_State *L;
     const char *const dbopens[] = { "open", "closed", "random", NULL };
     const int dbopens2i[] = { 1, 0, -1, -2 };
     xchar x, y;
-/*    int dbopen; */
     int mx, my, dir;
     int db_open;
     long dcoord;
@@ -4922,7 +4908,6 @@ lua_State *L;
     y = my;
 
     get_location_coord(&x, &y, DRY | WET | HOT, g.coder->croom, dcoord);
-    /* REVIEW: from here down was using dbopen previously */
     if (db_open == -1)
         db_open = !rn2(2);
     if (!create_drawbridge(x, y, dir, db_open ? TRUE : FALSE))
@@ -5088,9 +5073,6 @@ lua_State *L;
     int argc = lua_gettop(L);
     boolean freesel = FALSE;
     struct selectionvar *sel = (struct selectionvar *) 0;
-                                                  /* REVIEW: compiler warning,
-                                                    all assignments conditional
-                                                    so initializer was added */
 
     create_des_coder();
 
@@ -5123,9 +5105,6 @@ lua_State *L;
     int argc = lua_gettop(L);
     boolean freesel = FALSE;
     struct selectionvar *sel = (struct selectionvar *) 0;
-                                                  /* REVIEW: compiler warning,
-                                                    all assignments conditional
-                                                    so initializer was added */
 
     create_des_coder();
 
@@ -5192,15 +5171,14 @@ lua_State *L;
 /* reset_level is only needed for testing purposes */
 int
 lspo_reset_level(L)
-lua_State *L UNUSED;   /* macosx complaint needed UNUSED */
+lua_State *L UNUSED;
 {
     boolean wtower = In_W_tower(u.ux, u.uy, &u.uz);
 
     create_des_coder();
     makemap_prepost(TRUE, wtower);
     clear_level_structures();
-    return 0;   /* REVIEW: warning, int fn must return value
-                   so added "return 0; " */
+    return 0;
 }
 
 /* map({ x = 10, y = 10, map = [[...]] }); */
@@ -5211,9 +5189,7 @@ lspo_map(L)
 lua_State *L;
 {
     mazepart tmpmazepart;
-    /* xchar halign, valign; */   /* REVIEW: unreferenced */
     xchar tmpxstart, tmpystart, tmpxsize, tmpysize;
-    /* unpacked_coord upc; */   /* REVIEW: unreferenced */
 
     /*
 TODO: allow passing an array of strings as map data
diff --git a/sys/msdos/Makefile1.cross b/sys/msdos/Makefile1.cross
index dc530d80b..e2e6daede 100644
--- a/sys/msdos/Makefile1.cross
+++ b/sys/msdos/Makefile1.cross
@@ -5,7 +5,7 @@
 #       Makefile1.cross (this file) is for the host-side obj files and 
 #       utilities that will run on the host platform only.
 #
-#       Makefile2.cross is for the target platform obj files
+#       Makefile2.cross is the the target platform obj files
 #       and utilities.
 #
 #   Makefile2 utilizes the djgpp cross-compiler from Andrew Wu:
@@ -143,8 +143,8 @@ TEXTIO      = $(HOST_O)tiletext.o $(HOST_O)tiletxt.o $(HOST_O)drawing.o $(HOST_O
 TEXTIO2     = $(HOST_O)tiletex2.o $(HOST_O)tiletxt2.o $(HOST_O)drawing.o $(HOST_O)decl.o $(HOST_O)monst.o \
 		$(HOST_O)objects.o
 
-PLANAR_TIB  = $(DAT)/NETHACK1.TIB
-OVERVIEW_TIB = $(DAT)/NETHACKO.TIB
+#PLANAR_TIB  = $(DAT)/NETHACK1.TIB
+#OVERVIEW_TIB = $(DAT)/NETHACKO.TIB
 TILE_BMP    = $(DAT)/NHTILES.BMP
 
 TILEUTIL    = $(TILOBJ) $(U)tile2bin $(U)til2bin2 $(TILE_BMP) $(PLANAR_TIB) $(OVERVIEW_TIB)
diff --git a/sys/msdos/Makefile2.cross b/sys/msdos/Makefile2.cross
index 9c12ca7f2..7a99be2b4 100644
--- a/sys/msdos/Makefile2.cross
+++ b/sys/msdos/Makefile2.cross
@@ -363,7 +363,7 @@ LUAOBJFILES2 =  $(O)ldebug.o $(O)ldo.o $(O)ldump.o $(O)lfunc.o         \
 		$(O)lgc.o $(O)linit.o $(O)liolib.o $(O)llex.o
 LUAOBJFILES3 =  $(O)lmathlib.o $(O)lmem.o $(O)loadlib.o $(O)lobject.o  \
 		$(O)lopcodes.o $(O)loslib.o $(O)lparser.o $(O)lstate.o
-LUAOBJFILES3 =  $(O)lstring.o $(O)lstrlib.o $(O)ltable.o $(O)ltablib.o \
+LUAOBJFILES4 =  $(O)lstring.o $(O)lstrlib.o $(O)ltable.o $(O)ltablib.o \
 		$(O)ltm.o $(O)lundump.o $(O)lutf8lib.o $(O)lvm.o $(O)lzio.o
 
 #LUAOBJFILES =   $(O)lapi.o $(O)lauxlib.o $(O)lbaselib.o $(O)lbitlib.o  \
@@ -374,7 +374,7 @@ LUAOBJFILES3 =  $(O)lstring.o $(O)lstrlib.o $(O)ltable.o $(O)ltablib.o \
 #		$(O)lopcodes.o $(O)loslib.o $(O)lparser.o $(O)lstate.o \
 #		$(O)lstring.o $(O)lstrlib.o $(O)ltable.o $(O)ltablib.o \
 #		$(O)ltm.o $(O)lundump.o $(O)lutf8lib.o $(O)lvm.o $(O)lzio.o
-		
+	
 LUALIBOBJS = $(LUAOBJFILES1) $(LUAOBJFILES2) $(LUAOBJFILES3) $(LUAOBJFILES4)
 endif
 
@@ -746,11 +746,12 @@ endif
 #==========================================
 
 $(O)pdcurses.a : $(PDCLIBOBJS) $(PDCOBJS)
-	ar rcS $@ $(PDCLIBOBJS1)
-	ar rcS $@ $(PDCLIBOBJS2)
-	ar rcS $@ $(PDCLIBOBJS3)
-	ar rcS $@ $(PDCLIBOBJS4)
-	ar rcs $@ $(PDCOBJS)
+	if [ -f $@ ]; then rm $@; fi;
+	$(TARGET_AR) rcS $@ $(PDCLIBOBJS1)
+	$(TARGET_AR) rcS $@ $(PDCLIBOBJS2)
+	$(TARGET_AR) rcS $@ $(PDCLIBOBJS3)
+	$(TARGET_AR) rcS $@ $(PDCLIBOBJS4)
+	$(TARGET_AR) rcs $@ $(PDCOBJS)
 
 #==========================================
 #  Other Util Dependencies.
@@ -794,10 +795,11 @@ $(O)luac.o: $(LUASRC)/luac.c
 #==========================================
 
 $(LUALIB): $(LUALIBOBJS)
+	if [ -f $@ ]; then rm $@; fi;
 	$(TARGET_AR) rcS $@ $(LUAOBJFILES1)
 	$(TARGET_AR) rcS $@ $(LUAOBJFILES2)
 	$(TARGET_AR) rcS $@ $(LUAOBJFILES3)
-	$(TARGET_AR) rcS $@ $(LUAOBJFILES4)
+	$(TARGET_AR) rcs $@ $(LUAOBJFILES4)
 
 #$(LUADLL): $(LUALIBOBJS)
 #	$(TARGET_CC) -shared -Wl,--export-all-symbols \
diff --git a/sys/msdos/msdos-cross-compile.sh b/sys/msdos/msdos-cross-compile.sh
index 7769ceccd..ec4bcae01 100644
--- a/sys/msdos/msdos-cross-compile.sh
+++ b/sys/msdos/msdos-cross-compile.sh
@@ -1,34 +1,54 @@
 #!/bin/sh
-if [ -z "$TRAVIS_BUIILD_DIR" ]; then
+
+if [ -z "$TRAVIS_BUILD_DIR" ]; then
 	export DJGPP_TOP=$(pwd)/djgpp
 else
 	export DJGPP_TOP="$TRAVIS_BUILD_DIR/djgpp"
 fi
-export
+
+DJGPP_URL="https://github.com/andrewwutw/build-djgpp/releases/download/v2.9/"
+if [ "$(uname)" = "Darwin" ]; then
+    #Mac
+    DJGPP_FILE="djgpp-osx-gcc550.tar.bz2"
+elif [ "$(expr substr $(uname -s) 1 5)" = "Linux" ]; then
+    #Linux
+    DJGPP_FILE="djgpp-linux64-gcc550.tar.bz2"
+elif [ "$(expr substr $(uname -s) 1 10)" = "MINGW32_NT" ]; then
+    #mingw
+    DJGPP_FILE="djgpp-mingw-gcc550-standalone.zip"
+else
+    echo "No DJGPP release for you, sorry."
+    exit 1
+fi
+
+DJGPP_URL="$DJGPP_URL$DJGPP_FILE"
+
+# export
+
 cd util
-if [ ! -d ../djgpp/i586-pc-msdosdjgpp ]; then
-    if [ "$(uname)" = "Darwin" ]; then
-	#Mac
-	wget --no-hsts https://github.com/andrewwutw/build-djgpp/releases/download/v2.9/djgpp-osx-gcc550.tar.bz2
-    elif [ "$(expr substr $(uname -s) 1 5)" = "Linux" ]; then
- 	#Linux
-	wget --no-hsts https://github.com/andrewwutw/build-djgpp/releases/download/v2.9/djgpp-linux64-gcc550.tar.bz2
-    elif [ "$(expr substr $(uname -s) 1 10)" = "MINGW32_NT" ]; then	    
-	#mingw
-	wget --no-hsts https://github.com/andrewwutw/build-djgpp/releases/download/v2.9/djgpp-mingw-gcc550-standalone.zip
-    fi
-    if [ ! -d djgpp/i586-pc-msdosdjgpp ]; then
-	tar xjf util/djgpp-linux64-gcc550.tar.bz2
-    fi
+if [ ! -f "$DJGPP_FILE" ]; then
+    wget --no-hsts "$DJGPP_URL"
 fi
 cd ../
+
+
+if [ ! -d ../djgpp/i586-pc-msdosdjgpp ]; then
+    tar xjf "util/$DJGPP_FILE"
+fi
+
+#echo after tar
+# cd ../
+
+#pwd
+
 #  PDCurses
 if [ ! -d "../pdcurses" ]; then
 	echo "Getting ../pdcurses from https://github.com/wmcbrine/PDCurses.git"
 	git clone --depth 1 https://github.com/wmcbrine/PDCurses.git ../pdcurses
 fi
-cd djgpp
+
 # DOS-extender for use with djgpp
+cd djgpp
 if [ ! -d cwsdpmi ]; then
 	wget --no-hsts http://sandmann.dotster.com/cwsdpmi/csdpmi7b.zip
 	mkdir -p cwsdpmi
@@ -37,8 +57,14 @@ if [ ! -d cwsdpmi ]; then
 	cd ../
 	rm csdpmi7b.zip
 fi
-cd ../src
-pwd
+cd ../
+
+
+#echo after dos extender
+
+
+cd src
+
 mkdir -p ../msdos-binary
 cp ../dat/data.base ../dat/data.bas
 cp ../include/patchlevel.h ../include/patchlev.h
@@ -47,21 +73,26 @@ cp ../sys/share/posixregex.c ../sys/share/posixreg.c
 #cp ../sys/msdos/Makefile1.cross ../src/Makefile1
 #cp ../sys/msdos/Makefile2.cross ../src/Makefile2
 make -f ../sys/msdos/Makefile1.cross
-cat ../include/date.h
+#cat ../include/date.h
 export GCC_EXEC_PREFIX=$DJGPP_TOP/lib/gcc/
-export
-pwd
+# export
+
+#pwd
+
 make -f ../sys/msdos/Makefile2.cross
 unset GCC_EXEC_PREFIX
-pwd
-ls ../djgpp/cwsdpmi/bin 
-ls .
+#pwd
+
+#ls ../djgpp/cwsdpmi/bin 
+#ls .
+
 if [ -f ../djgpp/cwsdpmi/bin/CWSDPMI.EXE ]; then
     cp  ../djgpp/cwsdpmi/bin/CWSDPMI.EXE ../msdos-binary/CWSDPMI.EXE;
 fi
-ls -l ../msdos-binary
+
+# ls -l ../msdos-binary
 cd ../msdos-binary
 zip -9 ../NH370DOS.ZIP *
 cd ../
-ls -l NH370DOS.ZIP
+# ls -l NH370DOS.ZIP
 
diff --git a/sys/msdos/tile2bin.c b/sys/msdos/tile2bin.c
index 4c7a3228d..5d10248e4 100644
--- a/sys/msdos/tile2bin.c
+++ b/sys/msdos/tile2bin.c
@@ -17,7 +17,7 @@
 #include "tile.h"
 #include "pctiles.h"
 
-#include <dos.h>
+/* #include <dos.h> */
 #ifndef MONITOR_HEAP
 #include <stdlib.h>
 #endif