[wasm] Fix br_table in the wasm interpreter to use varuint32.

test/cctest/wasm/test-run-wasm.cc

 // Copyright 2015 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.
 
 #include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
 
 #include "src/base/platform/elapsed-timer.h"
 #include "src/utils.h"
@@ skipping 887 matching lines @@
             WASM_BLOCK_I(WASM_BRV_IFD(0, WASM_GET_LOCAL(0), WASM_GET_LOCAL(0)),
                          WASM_RETURN1(WASM_I8(9)), WASM_I8(7), WASM_I8(7)),
             WASM_BRV(0, WASM_I8(8))));
 
   for (int32_t i = 0; i < 5; i++) {
     int32_t expected = i != 0 ? 8 : 9;
     CHECK_EQ(expected, r.Call(i));
   }
 }
 
+WASM_EXEC_TEST(Regression_660262) {
+  TestingModule module(execution_mode);
+  module.AddMemoryElems<int32_t>(8);
+  WasmRunner<int32_t> r(&module);
+  BUILD(r, kExprI8Const, 0x00, kExprI8Const, 0x00, kExprI32LoadMem, 0x00, 0x0f,
+        kExprBrTable, 0x00, 0x80, 0x00);  // entries=0
+  r.Call();
+}
+
 WASM_EXEC_TEST(BrTable0a) {
   WasmRunner<int32_t> r(execution_mode, MachineType::Int32());
   BUILD(r, B1(B1(WASM_BR_TABLE(WASM_GET_LOCAL(0), 0, BR_TARGET(0)))),
         WASM_I8(91));
   FOR_INT32_INPUTS(i) { CHECK_EQ(91, r.Call(*i)); }
 }
 
 WASM_EXEC_TEST(BrTable0b) {
   WasmRunner<int32_t> r(execution_mode, MachineType::Int32());
   BUILD(r,
@@ skipping 2066 matching lines @@
   BUILD(r, WASM_I32_REMS(WASM_GET_LOCAL(0), WASM_GET_LOCAL(1)), WASM_DROP,
         WASM_ZERO);
   const int32_t kMin = std::numeric_limits<int32_t>::min();
   CHECK_EQ(0, r.Call(133, 100));
   CHECK_EQ(0, r.Call(kMin, -1));
   CHECK_EQ(0, r.Call(0, 1));
   CHECK_TRAP(r.Call(100, 0));
   CHECK_TRAP(r.Call(-1001, 0));
   CHECK_TRAP(r.Call(kMin, 0));
 }