diff --git a/scripts/tests/e3/rules.lua b/scripts/tests/e3/rules.lua
index 0e9d52147..902a91741 100644
--- a/scripts/tests/e3/rules.lua
+++ b/scripts/tests/e3/rules.lua
@@ -460,7 +460,6 @@ function test_canoe_passes_through_land()
     u1:add_order("NACH O O O")
     process_orders()
     assert_equal(land, u2.region, "canoe did not stop at coast")
-    u1:add_order("NACH O O O")
     process_orders()
     assert_equal(dst, sh.region, "canoe could not leave coast")
     assert_equal(dst, u1.region, "canoe could not leave coast")
diff --git a/scripts/tests/e3/spells.lua b/scripts/tests/e3/spells.lua
index c4f0aadaf..f99e4687b 100644
--- a/scripts/tests/e3/spells.lua
+++ b/scripts/tests/e3/spells.lua
@@ -58,7 +58,6 @@ function test_magic()
     u:add_spell("protective_runes")
     u:add_spell("analyze_magic")
     u:clear_orders()
-    u:add_order("ZAUBERE \"Runen des Schutzes\" BURG " .. itoa36(b.id));
     u.building = b
     u:add_order("ZAUBERE \"Magie analysieren\" BURG " .. itoa36(b.id));
     process_orders()
diff --git a/src/laws.test.c b/src/laws.test.c
index 900336d5c..12c2e8ecd 100644
--- a/src/laws.test.c
+++ b/src/laws.test.c
@@ -863,6 +863,22 @@ static void test_long_order_multi_buy(CuTest *tc) {
     test_cleanup();
 }
 
+static void test_long_order_multi_sell(CuTest *tc) {
+    // TODO: write more tests
+    unit *u;
+    test_cleanup();
+    u = test_create_unit(test_create_faction(0), test_create_region(0, 0, 0));
+    u->faction->locale = get_or_create_locale("de");
+    unit_addorder(u, create_order(K_SELL, u->faction->locale, 0));
+    unit_addorder(u, create_order(K_BUY, u->faction->locale, 0));
+    unit_addorder(u, create_order(K_SELL, u->faction->locale, 0));
+    update_long_order(u);
+    CuAssertPtrEquals(tc, 0, u->thisorder);
+    CuAssertPtrNotNull(tc, u->orders);
+    CuAssertPtrEquals(tc, 0, u->faction->msgs);
+    test_cleanup();
+}
+
 static void test_long_order_buy_cast(CuTest *tc) {
     // TODO: write more tests
     unit *u;
@@ -906,6 +922,7 @@ CuSuite *get_laws_suite(void)
     SUITE_ADD_TEST(suite, test_long_order_buy_sell);
     SUITE_ADD_TEST(suite, test_long_order_multi_long);
     SUITE_ADD_TEST(suite, test_long_order_multi_buy);
+    SUITE_ADD_TEST(suite, test_long_order_multi_sell);
     SUITE_ADD_TEST(suite, test_long_order_buy_cast);
     SUITE_ADD_TEST(suite, test_long_order_hungry);
     SUITE_ADD_TEST(suite, test_new_building_can_be_renamed);
diff --git a/src/magic.c b/src/magic.c
index 943c59db2..075880020 100644
--- a/src/magic.c
+++ b/src/magic.c
@@ -777,7 +777,7 @@ int spellcost(unit * u, const spell * sp)
     int count = countspells(u, 0);
     const resource_type *r_aura = get_resourcetype(R_AURA);
 
-    for (k = 0; sp->components[k].type; k++) {
+    for (k = 0; sp->components && sp->components[k].type; k++) {
         if (sp->components[k].type == r_aura) {
             aura = sp->components[k].amount;
         }
@@ -798,7 +798,7 @@ static int spl_costtyp(const spell * sp)
     int k;
     int costtyp = SPC_FIX;
 
-    for (k = 0; sp->components[k].type; k++) {
+    for (k = 0; sp->components && sp->components[k].type; k++) {
         if (costtyp == SPC_LINEAR)
             return SPC_LINEAR;
 
@@ -827,7 +827,7 @@ int eff_spelllevel(unit * u, const spell * sp, int cast_level, int range)
     int k, maxlevel, needplevel;
     int costtyp = SPC_FIX;
 
-    for (k = 0; sp->components[k].type; k++) {
+    for (k = 0; sp->components && sp->components[k].type; k++) {
         if (cast_level == 0)
             return 0;
 
@@ -894,7 +894,7 @@ void pay_spell(unit * u, const spell * sp, int cast_level, int range)
     int resuse;
 
     assert(cast_level > 0);
-    for (k = 0; sp->components[k].type; k++) {
+    for (k = 0; sp->components && sp->components[k].type; k++) {
         if (sp->components[k].type == r_aura) {
             resuse = spellcost(u, sp) * range;
         }
@@ -954,7 +954,7 @@ cancast(unit * u, const spell * sp, int level, int range, struct order * ord)
         return false;
     }
 
-    for (k = 0; sp->components[k].type; ++k) {
+    for (k = 0; sp->components && sp->components[k].type; ++k) {
         if (sp->components[k].amount > 0) {
             const resource_type *rtype = sp->components[k].type;
             int itemhave;
@@ -2768,15 +2768,13 @@ void magic(void)
                 continue;
             }
 
-            if (u->thisorder != NULL) {
-                for (ord = u->orders; ord; ord = ord->next) {
-                    if (getkeyword(ord) == K_CAST) {
-                        castorder *co = cast_cmd(u, ord);
-                        fset(u, UFL_LONGACTION | UFL_NOTMOVING);
-                        if (co) {
-                            const spell *sp = co->sp;
-                            add_castorder(&spellranks[sp->rank], co);
-                        }
+            for (ord = u->orders; ord; ord = ord->next) {
+                if (getkeyword(ord) == K_CAST) {
+                    castorder *co = cast_cmd(u, ord);
+                    fset(u, UFL_LONGACTION | UFL_NOTMOVING);
+                    if (co) {
+                        const spell *sp = co->sp;
+                        add_castorder(&spellranks[sp->rank], co);
                     }
                 }
             }
diff --git a/src/magic.test.c b/src/magic.test.c
index 9a01d5d4e..600f724ca 100644
--- a/src/magic.test.c
+++ b/src/magic.test.c
@@ -3,6 +3,7 @@
 #include "magic.h"
 
 #include <kernel/faction.h>
+#include <kernel/order.h>
 #include <kernel/item.h>
 #include <kernel/region.h>
 #include <kernel/spell.h>
@@ -382,9 +383,45 @@ void test_hasspell(CuTest * tc)
     test_cleanup();
 }
 
+static quicklist * casts;
+
+static int cast_fireball(struct castorder * co) {
+    ql_push(&casts, co);
+    return 0;
+}
+
+void test_multi_cast(CuTest *tc) {
+    unit *u;
+    spell *sp;
+    struct locale * lang;
+
+    test_cleanup();
+    sp = create_spell("fireball", 0);
+    sp->cast = cast_fireball;
+    CuAssertPtrEquals(tc, sp, find_spell("fireball"));
+
+    u = test_create_unit(test_create_faction(0), test_create_region(0, 0, 0));
+    u->faction->locale = lang = get_or_create_locale("de");
+    locale_setstring(lang, mkname("spell", sp->sname), "Feuerball");
+    CuAssertStrEquals(tc, "Feuerball", spell_name(sp, lang));
+    set_level(u, SK_MAGIC, 10);
+    unit_add_spell(u, 0, sp, 1);
+    CuAssertPtrEquals(tc, sp, unit_getspell(u, "Feuerball", lang));
+
+    unit_addorder(u, create_order(K_CAST, u->faction->locale, "Feuerball"));
+    unit_addorder(u, create_order(K_CAST, u->faction->locale, "Feuerball"));
+    CuAssertPtrEquals(tc, casts, 0);
+    magic();
+    CuAssertPtrNotNull(tc, casts);
+    CuAssertIntEquals(tc, 2, ql_length(casts));
+    ql_free(casts);
+    test_cleanup();
+}
+
 CuSuite *get_magic_suite(void)
 {
     CuSuite *suite = CuSuiteNew();
+    SUITE_ADD_TEST(suite, test_multi_cast);
     SUITE_ADD_TEST(suite, test_updatespells);
     SUITE_ADD_TEST(suite, test_spellbooks);
     SUITE_ADD_TEST(suite, test_pay_spell);
diff --git a/src/util/strings.c b/src/util/strings.c
index 3f3d7dc36..b3801d52f 100644
--- a/src/util/strings.c
+++ b/src/util/strings.c
@@ -43,6 +43,7 @@ char *set_string(char **s, const char *neu)
 unsigned int hashstring(const char *s)
 {
     unsigned int key = 0;
+    assert(s);
     while (*s) {
         key = key * 37 + *s++;
     }