diff --git a/src/builtins/builtins.zig b/src/builtins/builtins.zig
index 946b309a5..298cc8cd9 100644
--- a/src/builtins/builtins.zig
+++ b/src/builtins/builtins.zig
@@ -896,7 +896,7 @@ fn String_decode2(vm: *cy.VM) Value {
 fn arrayIndex(vm: *cy.VM) anyerror!Value {
     const arr = vm.getObject(*cy.heap.Array, 0);
     const elem_t: cy.TypeId = @intCast(vm.getInt(1));
-    const idx = try intAsIndex(vm.getInt(2), arr.len);
+    const idx = try intAsIndex(vm.getInt(2), @intCast(arr.len));
 
     const elems = arr.getElemsPtr();
     if (vm.sema.isUnboxedType(elem_t)) {
@@ -952,7 +952,7 @@ fn String_getInt32(vm: *cy.VM) anyerror!Value {
 fn stringFindAnyByte(vm: *cy.VM) Value {
     const slice = vm.getString(0);
     const set_slice = vm.getObject(*cy.heap.Object, 1);
-    const set_ptr: [*]u8 = @ptrFromInt(set_slice.getValue(0).val);
+    const set_ptr: [*]u8 = @ptrFromInt(@as(usize, @intCast(set_slice.getValue(0).val)));
     const set_len: usize = @intCast(set_slice.getValue(1).asInt());
     const set = set_ptr[0..set_len];
     const setIsAscii = cy.string.isAstring(set);
diff --git a/src/heap.zig b/src/heap.zig
index 3ec0018c1..4eac0b957 100644
--- a/src/heap.zig
+++ b/src/heap.zig
@@ -2095,13 +2095,13 @@ pub fn freeObject(vm: *cy.VM, obj: *HeapObject, comptime skip_cyc_children: bool
                     }
                 },
                 .array => {
-                    for (obj.array.getElemsPtr()[0..obj.array.len]) |it| {
+                    for (obj.array.getElemsPtr()[0..@intCast(obj.array.len)]) |it| {
                         if (skip_cyc_children and it.isCycPointer()) {
                             continue;
                         }
                         cy.arc.release(vm, it);
                     }
-                    freeExternalObject(vm, obj, (2 + obj.array.len) * @sizeOf(Value), true);
+                    freeExternalObject(vm, obj, @intCast((2 + obj.array.len) * @sizeOf(Value)), true);
                 },
                 .trait => {
                     const impl = obj.trait.impl;
diff --git a/src/sym.zig b/src/sym.zig
index 46e95553e..f35c204fb 100644
--- a/src/sym.zig
+++ b/src/sym.zig
@@ -1750,7 +1750,7 @@ test "sym internals" {
     } else {
         if (cy.is32Bit) {
             try t.eq(@sizeOf(Sym), 16);
-            try t.eq(@sizeOf(Func), 40);
+            try t.eq(@sizeOf(Func), 44);
         } else {
             try t.eq(@sizeOf(Sym), 24);
             try t.eq(@sizeOf(Func), 72);
diff --git a/src/vm.zig b/src/vm.zig
index 9490ea64c..ad3b0060e 100644
--- a/src/vm.zig
+++ b/src/vm.zig
@@ -199,6 +199,7 @@ pub const VM = struct {
     stdHttpClient: if (cy.hasCLI) *http.StdHttpClient else *anyopaque,
 
     emptyString: Value,
+    placeholder: Value,
 
     varSymExtras: cy.List(*cy.Sym),
 
@@ -234,6 +235,7 @@ pub const VM = struct {
             .compiler = undefined,
             .sema = undefined,
             .emptyString = undefined,
+            .placeholder = undefined,
             .strInterns = .{},
             .staticObjects = .{},
             .names = .{},
@@ -3463,7 +3465,7 @@ pub const VMGetArgExt = struct {
 
     pub fn getArrayElems(vm: *VM, idx: u32) []Value {
         const arr = vm.c.framePtr[CallArgStart + idx].castHeapObject(*cy.heap.Array);
-        return arr.getElemsPtr()[0..arr.len];
+        return arr.getElemsPtr()[0..@intCast(arr.len)];
     }
 
     pub fn getEnumValue(vm: *VM, idx: u32) u32 {