diff --git a/src/automate.c b/src/automate.c
index b47121183..e79bc4fdc 100644
--- a/src/automate.c
+++ b/src/automate.c
@@ -110,7 +110,7 @@ void autostudy_run(scholar scholars[], int nscholars)
             /* invariant: unit ti can still teach i students */
             int s, i = scholars[ti].u->number * STUDENTS_PER_TEACHER;
             /* invariant: unit si has n students that can still be taught */
-            int n = scholars[si].u->number;
+            int s, n = scholars[si].u->number;
             for (t = ti, s = si; t != si && s != se; ) {
                 if (i >= n) {
                     /* t has more than enough teaching capacity for s */
diff --git a/src/battle.c b/src/battle.c
index 35092b79c..f65a8d5d2 100644
--- a/src/battle.c
+++ b/src/battle.c
@@ -697,23 +697,20 @@ static int CavalryBonus(const unit * u, troop enemy, int type)
     return 0;
 }
 
+/**
+ * Effektiver Waffenskill waehrend des Kampfes.
+ */
 static int
-weapon_effskill(troop t, troop enemy, const weapon * w, bool attacking,
-bool missile)
-/* effektiver Waffenskill w�hrend des Kampfes */
+weapon_effskill(troop t, troop enemy, const weapon * w,
+    bool attacking, bool missile)
 {
-    /* In dieser Runde alle die Modifier berechnen, die fig durch die
-     * Waffen bekommt. */
     fighter *tf = t.fighter;
     unit *tu = t.fighter->unit;
-    int skill;
-    const weapon_type *wtype = w ? w->type : NULL;
+    /* Alle Modifier berechnen, die fig durch die Waffen bekommt. */
+    if (w) {
+        int skill = 0;
+        const weapon_type *wtype = w->type;
 
-    if (wtype == NULL) {
-        /* Ohne Waffe: Waffenlose Angriffe */
-        skill = weapon_skill(NULL, tu, attacking);
-    }
-    else {
         if (attacking) {
             skill = w->attackskill;
         }
@@ -745,30 +742,31 @@ bool missile)
                 }
             }
         }
-    }
+        /* Burgenbonus, Pferdebonus */
+        if (is_riding(t) && (wtype == NULL || (fval(wtype, WTF_HORSEBONUS)
+            && !fval(wtype, WTF_MISSILE)))) {
+            skill += CavalryBonus(tu, enemy, BONUS_SKILL);
+        }
 
-    /* Burgenbonus, Pferdebonus */
-    if (is_riding(t) && (wtype == NULL || (fval(wtype, WTF_HORSEBONUS)
-        && !fval(wtype, WTF_MISSILE)))) {
-        skill += CavalryBonus(tu, enemy, BONUS_SKILL);
-    }
+        if (t.index < tf->elvenhorses) {
+            /* Elfenpferde: Helfen dem Reiter, egal ob und welche Waffe. Das ist
+             * eleganter, und vor allem einfacher, sonst mu� man noch ein
+             * WMF_ELVENHORSE einbauen. */
+            skill += 2;
+        }
 
-    if (t.index < tf->elvenhorses) {
-        /* Elfenpferde: Helfen dem Reiter, egal ob und welche Waffe. Das ist
-         * eleganter, und vor allem einfacher, sonst mu� man noch ein
-         * WMF_ELVENHORSE einbauen. */
-        skill += 2;
+        if (skill > 0 && !attacking && missile) {
+            /*
+             * Wenn ich verteidige, und nicht direkt meinem Feind gegen�berstehe,
+             * halbiert sich mein Skill: (z.B. gegen Fernk�mpfer. Nahk�mpfer
+             * k�nnen mich eh nicht treffen)
+             */
+            skill /= 2;
+        }
+        return skill;
     }
-
-    if (skill > 0 && !attacking && missile) {
-        /*
-         * Wenn ich verteidige, und nicht direkt meinem Feind gegen�berstehe,
-         * halbiert sich mein Skill: (z.B. gegen Fernk�mpfer. Nahk�mpfer
-         * k�nnen mich eh nicht treffen)
-         */
-        skill /= 2;
-    }
-    return skill;
+    /* no weapon: fight weaponless */
+    return weapon_skill(NULL, tu, attacking);
 }
 
 const armor_type *select_armor(troop t, bool shield)
diff --git a/src/battle.test.c b/src/battle.test.c
index 92a26e692..be43a8ff6 100644
--- a/src/battle.test.c
+++ b/src/battle.test.c
@@ -123,6 +123,16 @@ static void test_select_weapon_restricted(CuTest *tc) {
     CuAssertIntEquals(tc, 0, af->weapons[0].count);
     free_battle(b);
 
+    itype->mask_deny = 0;
+    itype->mask_allow = rc_mask(au->_race);
+    b = make_battle(au->region);
+    af = make_fighter(b, au, make_side(b, au->faction, 0, 0, 0), false);
+    CuAssertPtrNotNull(tc, af->weapons);
+    CuAssertIntEquals(tc, 1, af->weapons[0].count);
+    CuAssertPtrEquals(tc, itype->rtype->wtype, (void *)af->weapons[0].type);
+    CuAssertIntEquals(tc, 0, af->weapons[1].count);
+    free_battle(b);
+
     itype->mask_deny = 0;
     itype->mask_allow = rc_mask(rc);
     b = make_battle(au->region);
diff --git a/src/kernel/config.c b/src/kernel/config.c
index 15387dca7..73b4aa22e 100644
--- a/src/kernel/config.c
+++ b/src/kernel/config.c
@@ -106,27 +106,31 @@ int findoption(const char *s, const struct locale *lang)
 
 /* -- Erschaffung neuer Einheiten ------------------------------ */
 
-static const char *forbidden[] = { "t", "te", "tem", "temp", NULL };
 static int *forbidden_ids;
 
-int forbiddenid(int id)
+bool forbiddenid(int id)
 {
+    static const char *forbidden[] = { "t", "te", "tem", "temp", NULL };
     static size_t len;
     size_t i;
-    if (id <= 0)
-        return 1;
+    if (id <= 0) {
+        return true;
+    }
     if (!forbidden_ids) {
         while (forbidden[len])
             ++len;
-        forbidden_ids = calloc(len, sizeof(int));
+        forbidden_ids = malloc(len * sizeof(int));
+        if (!forbidden_ids) abort();
         for (i = 0; i != len; ++i) {
             forbidden_ids[i] = atoi36(forbidden[i]);
         }
     }
-    for (i = 0; i != len; ++i)
-        if (id == forbidden_ids[i])
-            return 1;
-    return 0;
+    for (i = 0; i != len; ++i) {
+        if (id == forbidden_ids[i]) {
+            return true;
+        }
+    }
+    return false;
 }
 
 int newcontainerid(void)
@@ -274,6 +278,7 @@ void set_param(struct param **p, const char *key, const char *value)
     par = *p;
     if (!par && value) {
         *p = par = calloc(1, sizeof(param));
+        if (!par) abort();
     }
     if (par) {
         void *match;
@@ -509,7 +514,6 @@ order *default_order(const struct locale *lang)
     int i = locale_index(lang);
     keyword_t kwd;
     const char * str;
-    order *result = 0;
 
     assert(i < MAXLOCALES);
     kwd = keyword_disabled(K_WORK) ? NOKEYWORD : K_WORK;
@@ -518,7 +522,8 @@ order *default_order(const struct locale *lang)
         kwd = findkeyword(str);
     }
     if (kwd != NOKEYWORD) {
-        result = create_order(kwd, lang, NULL);
+        /* TODO: why is there a copy_order made here? */
+        order *result = create_order(kwd, lang, NULL);
         return copy_order(result);
     }
     return NULL;
diff --git a/src/kernel/config.h b/src/kernel/config.h
index 7789cd36d..83241ac4c 100644
--- a/src/kernel/config.h
+++ b/src/kernel/config.h
@@ -52,7 +52,7 @@ extern "C" {
     void init_locale(struct locale *lang);
     void init_races(struct locale *lang);
 
-    int forbiddenid(int id);
+    bool forbiddenid(int id);
     int newcontainerid(void);
 
     bool rule_region_owners(void);
diff --git a/src/kernel/item.c b/src/kernel/item.c
index 58702be07..a58df472c 100644
--- a/src/kernel/item.c
+++ b/src/kernel/item.c
@@ -194,12 +194,10 @@ resource_type *rt_get_or_create(const char *name) {
     if (!rtype) {
         rtype = calloc(1, sizeof(resource_type));
         if (!rtype) {
-            perror("resource_type allocation failed");
-        }
-        else {
-            rtype->_name = str_strdup(name);
-            rt_register(rtype);
+            abort();
         }
+        rtype->_name = str_strdup(name);
+        rt_register(rtype);
     }
     return rtype;
 }
@@ -247,6 +245,7 @@ item_type *it_get_or_create(resource_type *rtype) {
     if (!rtype->itype) {
         item_type * itype;
         itype = (item_type *)calloc(sizeof(item_type), 1);
+        if (!itype) abort();
         itype->rtype = rtype;
         rtype->uchange = res_changeitem;
         rtype->itype = itype;
@@ -269,6 +268,7 @@ luxury_type *new_luxurytype(item_type * itype, int price)
     assert(resource2luxury(itype->rtype) == NULL);
 
     ltype = calloc(sizeof(luxury_type), 1);
+    if (!ltype) abort();
     ltype->itype = itype;
     ltype->price = price;
     lt_register(ltype);
@@ -285,6 +285,7 @@ weapon_type *new_weapontype(item_type * itype,
     assert(itype && (!itype->rtype || !resource2weapon(itype->rtype)));
 
     wtype = calloc(sizeof(weapon_type), 1);
+    if (!wtype) abort();
     if (damage) {
         wtype->damage[0] = str_strdup(damage[0]);
         wtype->damage[1] = str_strdup(damage[1]);
@@ -309,6 +310,7 @@ armor_type *new_armortype(item_type * itype, double penalty, variant magres,
     assert(itype->rtype->atype == NULL);
 
     atype = calloc(sizeof(armor_type), 1);
+    if (!atype) abort();
 
     atype->itype = itype;
     atype->penalty = penalty;
@@ -530,6 +532,7 @@ item *i_new(const item_type * itype, int size)
     }
     else {
         i = malloc(sizeof(item));
+        if (!i) abort();
     }
     assert(itype);
     i->next = NULL;