[wasm] Be more lenient on the names section.

src/wasm/module-decoder.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 "src/wasm/module-decoder.h"
 
 #include "src/base/functional.h"
 #include "src/base/platform/platform.h"
 #include "src/flags.h"
 #include "src/macro-assembler.h"
@@ skipping 605 matching lines @@
             0                // source_size
         });
         WasmDataSegment* segment = &module->data_segments.back();
         DecodeDataSegmentInModule(module, segment);
       }
       section_iter.advance();
     }
 
     // ===== Name section ====================================================
     if (section_iter.section_code() == kNameSectionCode) {
-      const byte* pos = pc_;
       uint32_t functions_count = consume_u32v("functions count");
-      if (functions_count != module->num_declared_functions) {
-        error(pos, pos, "function name count %u mismatch (%u expected)",
-              functions_count, module->num_declared_functions);
-      }
 
       for (uint32_t i = 0; ok() && i < functions_count; ++i) {
-        WasmFunction* function =
-            &module->functions[i + module->num_imported_functions];
-        function->name_offset = consume_string(&function->name_length, false);
+        uint32_t function_name_length = 0;
+        uint32_t name_offset = consume_string(&function_name_length, false);
+        uint32_t func_index = i;
+        if (func_index < module->functions.size()) {
+          module->functions[func_index].name_offset = name_offset;
+          module->functions[func_index].name_length = function_name_length;
+        }
 
         uint32_t local_names_count = consume_u32v("local names count");
         for (uint32_t j = 0; ok() && j < local_names_count; j++) {
           skip_string();
         }
       }
       section_iter.advance();
     }
 
     // ===== Remaining sections ==============================================
@@ skipping 585 matching lines @@
     table.push_back(std::move(func_asm_offsets));
   }
   if (decoder.more()) decoder.error("unexpected additional bytes");
 
   return decoder.toResult(std::move(table));
 }
 
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8