math.mp: Fix initialization issues after resizing

source/tanya/math/mp.d

@@ -537,7 +537,7 @@ struct Integer
         return this;
     }
 
-    private unittest
+    private @nogc unittest
     {
         {
             auto h1 = Integer(1019);
@@ -761,6 +761,7 @@ struct Integer
         static if (op == "/")
         {
             auto quotient = allocator.resize!ubyte(null, bitSize / 8 + 1);
+            quotient.initializeAll();
         }
 
         // bitPosition keeps track of which bit, of the quotient,

source/tanya/memory/package.d

@@ -87,8 +87,8 @@ shared Allocator allocator;
 
 shared static this() nothrow @trusted @nogc
 {
-    import tanya.memory.mmappool;
-    allocator = MmapPool.instance;
+    import tanya.memory.mallocator;
+    allocator = Mallocator.instance;
 }
 
 @property ref shared(Allocator) defaultAllocator() nothrow @safe @nogc
@@ -162,11 +162,22 @@ package(tanya) T[] resize(T)(shared Allocator allocator,
                              auto ref T[] array,
                              const size_t length) @trusted
 {
-    void[] buf = array;
+    if (length == 0)
+    {
+        if (allocator.deallocate(array))
+        {
+            return null;
+        }
+        else
+        {
+            onOutOfMemoryErrorNoGC();
+        }
+    }
 
+    void[] buf = array;
     if (!allocator.reallocate(buf, length * T.sizeof))
     {
-        onOutOfMemoryError;
+        onOutOfMemoryErrorNoGC();
     }
     // Casting from void[] is unsafe, but we know we cast to the original type.
     array = cast(T[]) buf;