missing translations are the worst.

res/core/en/strings.xml

@@ -1081,7 +1081,7 @@
   <string name="lifepotion">
     <text locale="en">water of life</text>
   </string>
-  <string name="p2_p">
+  <string name="lifepotion_p">
     <text locale="en">waters of life</text>
   </string>
   <string name="p3">

src/reports.c

@@ -2114,10 +2114,14 @@ static void eval_resource(struct opstack **stack, const void *userdata)
     int j = opop(stack).i;
     const struct resource_type *res = (const struct resource_type *)opop(stack).v;
     const char *c = LOC(lang, resourcename(res, j != 1));
-    size_t len = strlen(c);
     variant var;
+    if (c) {
+        size_t len = strlen(c);
 
         var.v = strcpy(balloc(len + 1), c);
+    } else {
+        var.v = NULL;
+    }
     opush(stack, var);
 }
 

src/util/language.c

@@ -186,7 +186,7 @@ const char *locale_string(const locale * lang, const char *key, bool warn)
             return value;
         }
     }
-    return 0;
+    return NULL;
 }
 
 void locale_setstring(locale * lang, const char *key, const char *value)