Update nightly

Updated to `nightly-x86_64-apple-darwin updated - rustc 1.41.0-nightly
(19bd93467 2019-12-18)`.  It includes
rust-lang/rust#66256, which removed the `unwrap`
on `align_to_pad`.

liblumen_alloc/src/blocks/free_block_tree.rs

@@ -54,7 +54,7 @@ impl FreeBlocks {
         let mut cursor = self.addr_tree.front();
         let mut result = None;
 
-        let aligned = layout.pad_to_align().unwrap();
+        let aligned = layout.pad_to_align();
         let requested = aligned.size();
 
         while let Some(block) = cursor.get() {
@@ -77,7 +77,7 @@ impl FreeBlocks {
         let mut result = None;
         let mut best_size = 0;
 
-        let aligned = layout.pad_to_align().unwrap();
+        let aligned = layout.pad_to_align();
         let requested = aligned.size();
 
         match self.order {

liblumen_alloc/src/erts/fragment.rs

@@ -123,7 +123,7 @@ impl HeapAlloc for HeapFragment {
         use liblumen_core::sys::sysconf::MIN_ALIGN;
 
         // Ensure layout has alignment padding
-        let layout = layout.align_to(MIN_ALIGN).unwrap().pad_to_align().unwrap();
+        let layout = layout.align_to(MIN_ALIGN).unwrap().pad_to_align();
         // Capture the base pointer for this allocation
         let top = self.heap_top() as *mut u8;
         // Calculate available space and fail if not enough is free

liblumen_alloc/src/erts/process/gc/old_heap.rs

@@ -85,7 +85,7 @@ impl HeapAlloc for OldHeap {
     unsafe fn alloc_layout(&mut self, layout: Layout) -> AllocResult<NonNull<Term>> {
         use liblumen_core::sys::sysconf::MIN_ALIGN;
 
-        let layout = layout.align_to(MIN_ALIGN).unwrap().pad_to_align().unwrap();
+        let layout = layout.align_to(MIN_ALIGN).unwrap().pad_to_align();
 
         let needed = layout.size();
         let available = self.heap_available() * mem::size_of::<Term>();

liblumen_alloc/src/erts/process/gc/sweep.rs

@@ -72,8 +72,7 @@ where
 
         let layout = Layout::from_size_align(words * mem::size_of::<Term>(), MIN_ALIGN)
             .unwrap()
-            .pad_to_align()
-            .unwrap();
+            .pad_to_align();
         let total_size = layout.size();
 
         // Allocate space for move

liblumen_alloc/src/erts/process/gc/young_heap.rs

@@ -353,7 +353,7 @@ impl HeapAlloc for YoungHeap {
     unsafe fn alloc_layout(&mut self, layout: Layout) -> AllocResult<NonNull<Term>> {
         use liblumen_core::sys::sysconf::MIN_ALIGN;
 
-        let layout = layout.align_to(MIN_ALIGN).unwrap().pad_to_align().unwrap();
+        let layout = layout.align_to(MIN_ALIGN).unwrap().pad_to_align();
 
         let needed = layout.size();
         let available = self.heap_available() * mem::size_of::<Term>();

liblumen_alloc/src/erts/term/binary/heap.rs

@@ -90,7 +90,7 @@ impl HeapBin {
         // We pad to alignment so that the Layout produced here
         // matches that returned by `Layout::for_value` on the
         // final `HeapBin`
-        let layout = unpadded_layout.pad_to_align().unwrap();
+        let layout = unpadded_layout.pad_to_align();
 
         (layout, flags_offset, data_offset)
     }

liblumen_alloc/src/erts/term/binary/process.rs

@@ -134,7 +134,7 @@ impl ProcBin {
         // We pad to alignment so that the Layout produced here
         // matches that returned by `Layout::for_value` on the
         // final `ProcBinInner`
-        let layout = unpadded_layout.pad_to_align().unwrap();
+        let layout = unpadded_layout.pad_to_align();
 
         unsafe {
             let non_null = sys_alloc::alloc(layout)?;

liblumen_alloc/src/erts/term/closure.rs

@@ -59,7 +59,7 @@ impl ClosureLayout {
         let (layout, code_offset) = layout.extend(Layout::new::<Option<Code>>()).unwrap();
         let (layout, env_offset) = layout.extend(Layout::for_value(env)).unwrap();
 
-        let layout = layout.pad_to_align().unwrap();
+        let layout = layout.pad_to_align();
 
         Self {
             layout,

liblumen_alloc/src/erts/term/tuple.rs

@@ -112,7 +112,7 @@ impl Tuple {
         // We pad to alignment so that the Layout produced here
         // matches that returned by `Layout::for_value` on the
         // final `Tuple`
-        let layout = base_layout.pad_to_align().unwrap();
+        let layout = base_layout.pad_to_align();
 
         (layout, data_offset)
     }

liblumen_alloc/src/erts/testing.rs

@@ -142,7 +142,7 @@ impl HeapAlloc for RegionHeap {
     /// process heap during garbage collection
     unsafe fn alloc_layout(&mut self, layout: Layout) -> AllocResult<NonNull<Term>> {
         // Ensure layout has alignment padding
-        let layout = layout.align_to(MIN_ALIGN).unwrap().pad_to_align().unwrap();
+        let layout = layout.align_to(MIN_ALIGN).unwrap().pad_to_align();
         // Capture the base pointer for this allocation
         let top = self.top;
         // Calculate available space and fail if not enough is free

liblumen_eir_interpreter/src/exec/mod.rs

@@ -313,7 +313,7 @@ impl CallExecutor {
 
         let mut exec = self;
         // Outer loop for optimized execution within the current function
-        'outer: loop {
+        loop {
             // Insert block argument into environment
             let block_arg_vals = fun.fun.block_args(block);
             //trace!("{:?} {:?}", &block_arg_vals, &exec.next_args);