diff --git a/common.gypi b/common.gypi
index a1c01c922d0d42..414d4ea32ce19b 100644
--- a/common.gypi
+++ b/common.gypi
@@ -36,7 +36,7 @@
 
     # Reset this number to 0 on major V8 upgrades.
     # Increment by one for each non-official patch applied to deps/v8.
-    'v8_embedder_string': '-node.42',
+    'v8_embedder_string': '-node.43',
 
     ##### V8 defaults for Node.js #####
 
diff --git a/deps/v8/src/wasm/baseline/arm/liftoff-assembler-arm.h b/deps/v8/src/wasm/baseline/arm/liftoff-assembler-arm.h
index eb91b79ea55a95..9aeffbab576983 100644
--- a/deps/v8/src/wasm/baseline/arm/liftoff-assembler-arm.h
+++ b/deps/v8/src/wasm/baseline/arm/liftoff-assembler-arm.h
@@ -880,11 +880,13 @@ void LiftoffAssembler::AtomicLoad(LiftoffRegister dst, Register src_addr,
   if (cache_state()->is_used(LiftoffRegister(dst_high))) {
     SpillRegister(LiftoffRegister(dst_high));
   }
-  UseScratchRegisterScope temps(this);
-  Register actual_addr = liftoff::CalculateActualAddress(
-      this, &temps, src_addr, offset_reg, offset_imm);
-  ldrexd(dst_low, dst_high, actual_addr);
-  dmb(ISH);
+  {
+    UseScratchRegisterScope temps(this);
+    Register actual_addr = liftoff::CalculateActualAddress(
+        this, &temps, src_addr, offset_reg, offset_imm);
+    ldrexd(dst_low, dst_high, actual_addr);
+    dmb(ISH);
+  }
 
   LiftoffAssembler::ParallelRegisterMoveTuple reg_moves[]{
       {dst, LiftoffRegister::ForPair(dst_low, dst_high), kWasmI64}};
@@ -1196,12 +1198,10 @@ void LiftoffAssembler::Move(DoubleRegister dst, DoubleRegister src,
 }
 
 void LiftoffAssembler::Spill(int offset, LiftoffRegister reg, ValueType type) {
-#ifdef DEBUG
   // The {str} instruction needs a temp register when the immediate in the
   // provided MemOperand does not fit into 12 bits. This happens for large stack
   // frames. This DCHECK checks that the temp register is available when needed.
   DCHECK(UseScratchRegisterScope{this}.CanAcquire());
-#endif
   DCHECK_LT(0, offset);
   RecordUsedSpillOffset(offset);
   MemOperand dst(fp, -offset);
diff --git a/deps/v8/test/mjsunit/regress/wasm/regress-1153442.js b/deps/v8/test/mjsunit/regress/wasm/regress-1153442.js
new file mode 100644
index 00000000000000..989da11a25b85f
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/wasm/regress-1153442.js
@@ -0,0 +1,61 @@
+// Copyright 2020 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --experimental-wasm-threads
+
+load('test/mjsunit/wasm/wasm-module-builder.js');
+
+const builder = new WasmModuleBuilder();
+builder.addMemory(1, 1, false, true);
+builder.addGlobal(kWasmI32, 1);
+builder.addGlobal(kWasmI32, 1);
+builder.addType(makeSig([kWasmI32, kWasmI64, kWasmI32], []));
+// Generate function 1 (out of 1).
+builder.addFunction(undefined, 0 /* sig */)
+  .addLocals(kWasmI32, 10)
+  .addBodyWithEnd([
+// signature: v_ili
+// body:
+kExprI32Const, 0x00,  // i32.const
+kExprLocalSet, 0x04,  // local.set
+kExprI32Const, 0x01,  // i32.const
+kExprLocalSet, 0x05,  // local.set
+kExprBlock, kWasmStmt,  // block @11
+  kExprBr, 0x00,  // br depth=0
+  kExprEnd,  // end @15
+kExprGlobalGet, 0x01,  // global.get
+kExprLocalSet, 0x03,  // local.set
+kExprLocalGet, 0x03,  // local.get
+kExprI32Const, 0x01,  // i32.const
+kExprI32Sub,  // i32.sub
+kExprLocalSet, 0x06,  // local.set
+kExprI64Const, 0x01,  // i64.const
+kExprLocalSet, 0x01,  // local.set
+kExprI32Const, 0x00,  // i32.const
+kExprI32Eqz,  // i32.eqz
+kExprLocalSet, 0x07,  // local.set
+kExprBlock, kWasmStmt,  // block @36
+  kExprBr, 0x00,  // br depth=0
+  kExprEnd,  // end @40
+kExprGlobalGet, 0x01,  // global.get
+kExprLocalSet, 0x08,  // local.set
+kExprI32Const, 0x01,  // i32.const
+kExprI32Const, 0x01,  // i32.const
+kExprI32Sub,  // i32.sub
+kExprLocalSet, 0x09,  // local.set
+kExprLocalGet, 0x00,  // local.get
+kExprLocalSet, 0x0a,  // local.set
+kExprGlobalGet, 0x00,  // global.get
+kExprLocalSet, 0x0b,  // local.set
+kExprI32Const, 0x00,  // i32.const
+kExprI32Const, 0x0f,  // i32.const
+kExprI32And,  // i32.and
+kExprLocalSet, 0x0c,  // local.set
+kExprI32Const, 0x00,  // i32.const
+kAtomicPrefix, kExprI64AtomicLoad, 0x03, 0x04,  // i64.atomic.load64
+kExprDrop,  // drop
+kExprUnreachable,  // unreachable
+kExprEnd,  // end @75
+]);
+builder.toModule();