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Примеры ошибок, обнаруженных с...

Примеры ошибок, обнаруженных с помощью диагностики V581

V581. Conditional expressions of 'if' statements located next to each other are identical.

LLVM/Clang

V581 The conditional expressions of the 'if' statements situated alongside each other are identical. Check lines: 5820, 5823. PPCInstrInfo.cpp 5823


bool PPCInstrInfo::getMemOperandWithOffsetWidth(....){
  if (!LdSt.mayLoadOrStore() || LdSt.getNumExplicitOperands() != 3)
    return false;

  // Handle only loads/stores with base register
  // followed by immediate offset.
  if (!LdSt.getOperand(1).isImm() ||
      (!LdSt.getOperand(2).isReg() && !LdSt.getOperand(2).isFI()))
    return false;
  if (!LdSt.getOperand(1).isImm() ||
      (!LdSt.getOperand(2).isReg() && !LdSt.getOperand(2).isFI()))
    return false;
  ....
}

Telegram

V581 The conditional expressions of the 'if' statements situated alongside each other are identical. Check lines: 439, 442. export_api_wrap.cpp 442


void ApiWrap::startExport( const Settings &settings,
                           Output::Stats *stats,
                           FnMut<void(StartInfo)> done)
{
  ....
  if (_settings->types & Settings::Type::Userpics) {
    _startProcess->steps.push_back(Step::UserpicsCount);
  }
  if (_settings->types & Settings::Type::Stories) {
    _startProcess->steps.push_back(Step::StoriesCount);
  }
  if (_settings->types & Settings::Type::AnyChatsMask) { // <=
    _startProcess->steps.push_back(Step::SplitRanges);
  }
  if (_settings->types & Settings::Type::AnyChatsMask) { // <=
    _startProcess->steps.push_back(Step::DialogsCount);
  }
  if (_settings->types & Settings::Type::GroupsChannelsMask) {
    if (!_settings->onlySinglePeer()) {
      _startProcess->steps.push_back(Step::LeftChannelsCount);
    }
  }
  ....
}

DPDK

V581 The conditional expressions of the 'if' statements situated alongside each other are identical. Check lines: 997, 999. rte_eth_tap.c 999


#define RTE_ETH_SPEED_NUM_2_5G      2500 /**< 2.5 Gbps */
#define RTE_ETH_SPEED_NUM_5G        5000 /**<   5 Gbps */

static uint32_t
tap_dev_speed_capa(void)
{
  uint32_t speed = pmd_link.link_speed;
  uint32_t capa = 0;

  if (speed >= RTE_ETH_SPEED_NUM_10M)
    capa |= RTE_ETH_LINK_SPEED_10M;
  if (speed >= RTE_ETH_SPEED_NUM_100M)
    capa |= RTE_ETH_LINK_SPEED_100M;
  if (speed >= RTE_ETH_SPEED_NUM_1G)
    capa |= RTE_ETH_LINK_SPEED_1G;
  if (speed >= RTE_ETH_SPEED_NUM_5G)   // <=
    capa |= RTE_ETH_LINK_SPEED_2_5G;   // <=
  if (speed >= RTE_ETH_SPEED_NUM_5G)   // <=
    capa |= RTE_ETH_LINK_SPEED_5G;     // <=
  if (speed >= RTE_ETH_SPEED_NUM_10G)
    capa |= RTE_ETH_LINK_SPEED_10G;
  if (speed >= RTE_ETH_SPEED_NUM_20G)
    capa |= RTE_ETH_LINK_SPEED_20G;
  if (speed >= RTE_ETH_SPEED_NUM_25G)
    capa |= RTE_ETH_LINK_SPEED_25G;
  if (speed >= RTE_ETH_SPEED_NUM_40G)
    capa |= RTE_ETH_LINK_SPEED_40G;
  if (speed >= RTE_ETH_SPEED_NUM_50G)
    capa |= RTE_ETH_LINK_SPEED_50G;
  if (speed >= RTE_ETH_SPEED_NUM_56G)
    capa |= RTE_ETH_LINK_SPEED_56G;
  if (speed >= RTE_ETH_SPEED_NUM_100G)
    capa |= RTE_ETH_LINK_SPEED_100G;

  return capa;
}

GTK

V581 [CWE-670] The conditional expressions of the 'if' statements situated alongside each other are identical. Check lines: 674, 675. sass2scss.cpp 675


static std::string removeMultilineComment (std::string &sass)
{
  ....
  if (pos_colon != std::string::npos)
  {
    // it is not a selector if we have a space after a colon
    if (sass[pos_colon+1] == ' ') converter.selector = false;
    if (sass[pos_colon+1] == '  ') converter.selector = false;   // <= tab
  }
  ....
}

Chromium

V581 The conditional expressions of the 'if' statements situated alongside each other are identical. Check lines: 144, 148. heap-controller.cc 148


template <typename Trait>
size_t MemoryController<Trait>::CalculateAllocationLimit(
    Heap* heap, size_t current_size, size_t min_size, size_t max_size,
    size_t new_space_capacity, double factor,
    Heap::HeapGrowingMode growing_mode)
{
  ....
  if (FLAG_heap_growing_percent > 0) {
    factor = 1.0 + FLAG_heap_growing_percent / 100.0;
  }

  if (FLAG_heap_growing_percent > 0) {
    factor = 1.0 + FLAG_heap_growing_percent / 100.0;
  }

  CHECK_LT(1.0, factor);
  ....
}

RPCS3

V581 The conditional expressions of the 'if' statements situated alongside each other are identical. Check lines: 4225, 4226. PPUTranslator.cpp 4226


void PPUTranslator::MTFSFI(ppu_opcode_t op)
{
  SetFPSCRBit(op.crfd * 4 + 0, m_ir->getInt1((op.i & 8) != 0), false);
  if (op.crfd != 0) SetFPSCRBit(op.crfd * 4 + 1,
                                m_ir->getInt1((op.i & 4) != 0), false);
  if (op.crfd != 0) SetFPSCRBit(op.crfd * 4 + 2,
                                m_ir->getInt1((op.i & 2) != 0), false);
  SetFPSCRBit(op.crfd * 4 + 3, m_ir->getInt1((op.i & 1) != 0), false);

  if (op.rc) SetCrFieldFPCC(1);
}

Similar errors can be found in some other places:

  • V581 The conditional expressions of the 'if' statements situated alongside each other are identical. Check lines: 758, 759. RSXThread.cpp 759

LLVM/Clang

V581 [CWE-670] The conditional expressions of the 'if' statements situated alongside each other are identical. Check lines: 1380, 1383. ELFEmitter.cpp 1383


template <class ELFT>
void ELFState<ELFT>::writeSectionContent(
    Elf_Shdr &SHeader, const ELFYAML::StackSizesSection &Section,
    ContiguousBlobAccumulator &CBA) {
  if (!Section.Entries)
    return;

  if (!Section.Entries)
    return;
  ....
}

Similar errors can be found in some other places:

  • V581 [CWE-670] The conditional expressions of the 'if' statements situated alongside each other are identical. Check lines: 1488, 1491. ELFEmitter.cpp 1491
  • V581 [CWE-670] The conditional expressions of the 'if' statements situated alongside each other are identical. Check lines: 1663, 1666. ELFEmitter.cpp 1666

LLVM/Clang

V581 [CWE-670] The conditional expressions of the 'if' statements situated alongside each other are identical. Check lines: 335, 337. DbiStreamBuilder.cpp 337


static uint16_t toSecMapFlags(uint32_t Flags) {
  uint16_t Ret = 0;
  if (Flags & COFF::IMAGE_SCN_MEM_READ)
    Ret |= static_cast<uint16_t>(OMFSegDescFlags::Read);
  if (Flags & COFF::IMAGE_SCN_MEM_WRITE)
    Ret |= static_cast<uint16_t>(OMFSegDescFlags::Write);    // <=
  if (Flags & COFF::IMAGE_SCN_MEM_EXECUTE)                   // <=
    Ret |= static_cast<uint16_t>(OMFSegDescFlags::Execute);  // <=
  if (Flags & COFF::IMAGE_SCN_MEM_EXECUTE)                   // <=
    Ret |= static_cast<uint16_t>(OMFSegDescFlags::Execute);
  if (!(Flags & COFF::IMAGE_SCN_MEM_16BIT))
    Ret |= static_cast<uint16_t>(OMFSegDescFlags::AddressIs32Bit);
  ....
}

Snort

V581 The conditional expressions of the 'if' statements situated alongside each other are identical. Check lines: 300, 308. sf_snort_plugin_pcre.c 308


static int pcreMatchInternal(...., const uint8_t **cursor)
{
  const uint8_t *buffer_start;
  int pcre_offset;
  int pcre_found;
  ....
  if (pcre_found)
  {
    if (cursor)
    {
      *cursor = buffer_start + pcre_offset;
    }
  }

  if (pcre_found)
    return RULE_MATCH;
  ....
}

Qt

V581 [CWE-670] The conditional expressions of the 'if' statements situated alongside each other are identical. Check lines: 2719, 2721. moc_qquickpath_p.cpp 2721


void *QQuickPath::qt_metacast(const char *_clname)
{
  if (!_clname) return nullptr;
  if (!strcmp(_clname, qt_meta_stringdata_QQuickPath.stringdata0))
    return static_cast<void*>(this);
  if (!strcmp(_clname, "QQmlParserStatus"))
    return static_cast< QQmlParserStatus*>(this);
  if (!strcmp(_clname, "org.qt-project.Qt.QQmlParserStatus"))   // <=
    return static_cast< QQmlParserStatus*>(this);
  if (!strcmp(_clname, "org.qt-project.Qt.QQmlParserStatus"))   // <=
    return static_cast< QQmlParserStatus*>(this);
  return QObject::qt_metacast(_clname);
}

LLVM/Clang

V581 The conditional expressions of the 'if' statements situated alongside each other are identical. Check lines: 3108, 3113. MallocChecker.cpp 3113


bool MallocChecker::mayFreeAnyEscapedMemoryOrIsModeledExplicitly(....)
{
  ....
  StringRef FName = II->getName();
  ....
  if (FName == "postEvent" &&
      FD->getQualifiedNameAsString() == "QCoreApplication::postEvent") {
    return true;
  }

  if (FName == "postEvent" &&
      FD->getQualifiedNameAsString() == "QCoreApplication::postEvent") {
    return true;
  }
  ....
}

Universal

V581 The conditional expressions of the 'if' statements situated alongside each other are identical. Check lines: 789, 790. value.hpp 790


template<size_t fbits, size_t abits>
void module_subtract_BROKEN(const value<fbits>& lhs,
                            const value<fbits>& rhs,
                            value<abits + 1>& result) {

  if (lhs.isinf() || rhs.isinf()) {
    result.setinf();
    return;
  }
  int lhs_scale = lhs.scale(),
      rhs_scale = rhs.scale(),
      scale_of_result = std::max(lhs_scale, rhs_scale);

  // align the fractions
  bitblock<abits> r1 = lhs.template nshift<abits>(lhs_scale-scale_of_result+3);
  bitblock<abits> r2 = rhs.template nshift<abits>(rhs_scale-scale_of_result+3);
  bool r1_sign = lhs.sign(), r2_sign = rhs.sign();
  //bool signs_are_equal = r1_sign == r2_sign;

  if (r1_sign) r1 = twos_complement(r1);
  if (r1_sign) r2 = twos_complement(r2);  // <=

  ....
}

TON

V581 The conditional expressions of the 'if' statements situated alongside each other are identical. Check lines: 80, 84. blockdb.cpp 84


namespace td {
namespace detail {

[[noreturn]] void process_check_error(const char *message, const char *file,
                                      int line);

}  // namespace detail
}

#define CHECK(condition)                                               \
  if (!(condition)) {                                                  \
    ::td::detail::process_check_error(#condition, __FILE__, __LINE__); \
  }

void BlockDb::get_block_handle(BlockIdExt id, ....) {
  if (!id.is_valid()) {
    promise.set_error(....);
    return;
  }
  CHECK(id.is_valid()); // <=
  ....
}

Celestia

V581 The conditional expressions of the 'if' statements situated alongside each other are identical. Check lines: 2844, 2850. shadermanager.cpp 2850


GLVertexShader*
ShaderManager::buildParticleVertexShader(const ShaderProperties& props)
{
  ....
  if (props.texUsage & ShaderProperties::PointSprite)
  {
    source << "uniform float pointScale;\n";
    source << "attribute float pointSize;\n";
  }

  if (props.texUsage & ShaderProperties::PointSprite)
  {
    source << DeclareVarying("pointFade", Shader_Float);
  }
  ....
}

FreeRDP

V581 The conditional expressions of the 'if' statements situated alongside each other are identical. Check lines: 269, 283. ndr_structure.c 283


void NdrComplexStructBufferSize(PMIDL_STUB_MESSAGE pStubMsg,
      unsigned char* pMemory, PFORMAT_STRING pFormat)
{
  ....
  if (conformant_array_description)
  {
    ULONG size;
    unsigned char array_type;
    array_type = conformant_array_description[0];
    size = NdrComplexStructMemberSize(pStubMsg, pFormat);
    WLog_ERR(TAG, "warning: NdrComplexStructBufferSize array_type: "
      "0x%02X unimplemented", array_type);
    NdrpComputeConformance(pStubMsg, pMemory + size,
      conformant_array_description);
    NdrpComputeVariance(pStubMsg, pMemory + size,
      conformant_array_description);
    MaxCount = pStubMsg->MaxCount;
    ActualCount = pStubMsg->ActualCount;
    Offset = pStubMsg->Offset;
  }

  if (conformant_array_description)
  {
    unsigned char array_type;
    array_type = conformant_array_description[0];
    pStubMsg->MaxCount = MaxCount;
    pStubMsg->ActualCount = ActualCount;
    pStubMsg->Offset = Offset;
    WLog_ERR(TAG, "warning: NdrComplexStructBufferSize array_type: "
      "0x%02X unimplemented", array_type);
  }
  ....
}

Krita

V581 The conditional expressions of the 'if' statements situated alongside each other are identical. Check lines: 675, 679. KoTableCellStyle.cpp 679


void KoTableCellStyle::loadOdfProperties(
    KoShapeLoadingContext &context,
    KoStyleStack &styleStack)
{
  ....
  if (styleStack.hasProperty(KoXmlNS::style, "repeat-content"))
  {
    setRepeatContent(styleStack.property(KoXmlNS::style,
                       "repeat-content") == "true");
  }

  if (styleStack.hasProperty(KoXmlNS::style, "repeat-content"))
  {
    setRepeatContent(styleStack.property(KoXmlNS::style,
                       "repeat-content") == "true");
  }
  ....
}

Skia Graphics Engine

V581 The conditional expressions of the 'if' statements situated alongside each other are identical. Check lines: 758, 761. skpathref.cpp 761


bool SkPathRef::isValid() const {
  ....
  if (nullptr == fPoints && 0 != fFreeSpace) {
    return false;
  }
  if (nullptr == fPoints && 0 != fFreeSpace) {
    return false;
  }
  ....
}

The same check is performed twice. Or the second check is redundant. Or one forgot to check out something else.

Far2l

V581 The conditional expressions of the 'if' operators situated alongside each other are identical. Check lines: 267, 268. APIStringMap.cpp 268


static BOOL WINPORT(GetStringType)( DWORD type,
                                    LPCWSTR src,
                                    INT count,
                                    LPWORD chartype )
{
  ....
  while (count--)
  {
    int c = *src;
    WORD type1, type3 = 0; /* C3_NOTAPPLICABLE */
    ....
    if ((c>=0xFFE0)&&(c<=0xFFE6)) type3 |= C3_FULLWIDTH; // <=
    if ((c>=0xFFE0)&&(c<=0xFFE6)) type3 |= C3_SYMBOL;    // <=
    ....
  }
  ....
}

Similar errors can be found in some other places:

  • V581 The conditional expressions of the 'if' operators situated alongside each other are identical. Check lines: 272, 273. APIStringMap.cpp 273
  • V581 The conditional expressions of the 'if' operators situated alongside each other are identical. Check lines: 274, 275. APIStringMap.cpp 275
  • V581 The conditional expressions of the 'if' operators situated alongside each other are identical. Check lines: 6498, 6503. macro.cpp 6503
  • And 2 additional diagnostic messages.

Linux Kernel

V581 The conditional expressions of the 'if' operators situated alongside each other are identical. Check lines: 2384, 2390. debug.c 2390


int dbg_check_nondata_nodes_order(....)
{
  ....
  sa = container_of(cur, struct ubifs_scan_node, list);
  sb = container_of(cur->next, struct ubifs_scan_node, list);

  if (sa->type != UBIFS_INO_NODE &&
      sa->type != UBIFS_DENT_NODE &&
      sa->type != UBIFS_XENT_NODE) {
    ubifs_err(c, "bad node type %d", sa->type);
    ubifs_dump_node(c, sa->node);
    return -EINVAL;
  }
  if (sa->type != UBIFS_INO_NODE &&
      sa->type != UBIFS_DENT_NODE &&
      sa->type != UBIFS_XENT_NODE) {
    ubifs_err(c, "bad node type %d", sb->type);
    ubifs_dump_node(c, sb->node);
    return -EINVAL;
  }
  ....
}

GDB

V581 The conditional expressions of the 'if' operators situated alongside each other are identical. Check lines: 4535, 4537. tracepoint.c 4537


int
handle_tracepoint_bkpts (struct thread_info *tinfo,
                         CORE_ADDR stop_pc)
{
  int ipa_trace_buffer_is_full;
  CORE_ADDR ipa_stopping_tracepoint;
  int ipa_expr_eval_result;
  CORE_ADDR ipa_error_tracepoint;
  ....
  if (ipa_trace_buffer_is_full)
    trace_debug ("lib stopped due to full buffer.");
  if (ipa_stopping_tracepoint)
    trace_debug ("lib stopped due to tpoint");
  if (ipa_stopping_tracepoint)
    trace_debug ("lib stopped due to error");
  ....
}

Inkscape

V581 The conditional expressions of the 'if' operators situated alongside each other are identical. Check lines: 1046, 1051. sp-mesh-array.cpp 1051


void SPMeshNodeArray::create( ...., Geom::OptRect bbox ) // <=
{
  ....
  if( !bbox ) {
    std::cout << "SPMeshNodeArray::create(): bbox empty"
              << std::endl;
    Geom::OptRect bbox = item->geometricBounds();        // <=
  }
  if( !bbox ) {                                          // <=
    std::cout << "ERROR: No bounding box!"
              << std::endl;
    return;
  }
  ....
}

Open X-Ray Engine

V581 The conditional expressions of the 'if' operators situated alongside each other are identical. Check lines: 445, 447. base_monster_startup.cpp 447


void CBaseMonster::settings_read(CInifile const * ini,
                                 LPCSTR section,
                                 SMonsterSettings &data)
{
  ....
  if (ini->line_exist(ppi_section,"color_base"))
    sscanf(ini->r_string(ppi_section,"color_base"), "%f,%f,%f",
           &data.m_attack_effector.ppi.color_base.r,
           &data.m_attack_effector.ppi.color_base.g,
           &data.m_attack_effector.ppi.color_base.b);
  if (ini->line_exist(ppi_section,"color_base"))
    sscanf(ini->r_string(ppi_section,"color_gray"), "%f,%f,%f",
           &data.m_attack_effector.ppi.color_gray.r,
           &data.m_attack_effector.ppi.color_gray.g,
           &data.m_attack_effector.ppi.color_gray.b);
  if (ini->line_exist(ppi_section,"color_base"))
    sscanf(ini->r_string(ppi_section,"color_add"), "%f,%f,%f",
           &data.m_attack_effector.ppi.color_add.r,
           &data.m_attack_effector.ppi.color_add.g,
           &data.m_attack_effector.ppi.color_add.b);
  ....
}

Similar errors can be found in some other places:

  • V581 The conditional expressions of the 'if' operators situated alongside each other are identical. Check lines: 447, 449. base_monster_startup.cpp 449

Firebird

V581 The conditional expressions of the 'if' operators situated alongside each other are identical. Check lines: 506, 509. idx.cpp 509


void IDX_create_index(....)
{
  ....
  index_fast_load ifl_data;
  ....
  if (!ifl_data.ifl_duplicates)
    scb->sort(tdbb);

  if (!ifl_data.ifl_duplicates)
    BTR_create(tdbb, creation, selectivity);

  ....
}

FreeSWITCH

V581 The conditional expressions of the 'if' operators situated alongside each other are identical. Check lines: 41, 45. switch_dso.c 45


SWITCH_DECLARE(switch_dso_lib_t) switch_dso_open(....)
{
  HINSTANCE lib;

  lib = LoadLibraryEx(path, NULL, 0);

  if (!lib) {
    LoadLibraryEx(path, NULL, LOAD_WITH_ALTERED_SEARCH_PATH);
  }

  if (!lib) {
    DWORD error = GetLastError();
    *err = switch_mprintf("dll open error [%ul]\n", error);
  }

  return lib;
}

Unreal Engine 4

V581 The conditional expressions of the 'if' operators situated alongside each other are identical. Check lines: 1334, 1340. foliageedmode.cpp 1340


void FEdModeFoliage::ReapplyInstancesForBrush(....)
{
  ....
  if (Settings->ReapplyScaleY)
  {
    Instance.DrawScale3D.Y = NewScale.Y;
    bUpdated = true;
  }

  if (Settings->ReapplyScaleY)
  {
    Instance.DrawScale3D.Z = NewScale.Z;
    bUpdated = true;
  }
  ....
}

LibreOffice

V581 The conditional expressions of the 'if' operators situated alongside each other are identical. Check lines: 77, 79. eventoootcontext.cxx 79


XMLTransformerOOoEventMap_Impl::XMLTransformerOOoEventMap_Impl(
        XMLTransformerEventMapEntry *pInit,
        XMLTransformerEventMapEntry *pInit2 )
{
  if( pInit )
    AddMap( pInit );
  if( pInit )
    AddMap( pInit2 );
}

Asterisk

V581 The conditional expressions of the 'if' operators situated alongside each other are identical. Check lines: 2513, 2516. chan_sip.c 2516


static void sip_threadinfo_destructor(void *obj)
{
  struct sip_threadinfo *th = obj;
  struct tcptls_packet *packet;

  if (th->alert_pipe[1] > -1) {            // <=
    close(th->alert_pipe[0]);
  }
  if (th->alert_pipe[1] > -1) {
    close(th->alert_pipe[1]);
  }
  th->alert_pipe[0] = th->alert_pipe[1] = -1;
  ....
}

Chromium

V581 The conditional expressions of the 'if' operators situated alongside each other are identical. Check lines: 259, 261. profile_sync_service_password_unittest.cc 261


static bool PasswordFormComparator(const PasswordForm& pf1,
                                   const PasswordForm& pf2) {
  if (pf1.submit_element < pf2.submit_element)
    return true;
  if (pf1.username_element < pf2.username_element)
    return true;
  if (pf1.username_value < pf2.username_value)
    return true;
  if (pf1.username_value < pf2.username_value)
    return true;
  if (pf1.password_element < pf2.password_element)
    return true;
  if (pf1.password_value < pf2.password_value)
    return true;

  return false;
}

WebM

V581 The conditional expressions of the 'if' operators situated alongside each other are identical. Check lines: 755, 758. vp8_cx_iface.c 758


static vpx_codec_err_t vp8e_encode(....)
{
  vpx_codec_err_t res = VPX_CODEC_OK;

  if (!ctx->cfg.rc_target_bitrate)
    return res;

  if (!ctx->cfg.rc_target_bitrate)
    return res;
  ....
}

Chromium

V581 The conditional expressions of the 'if' operators situated alongside each other are identical. Check lines: 176, 178. handle_enumerator_win.cc 178


string16 GetAccessString(HandleType handle_type,
                         ACCESS_MASK access) {
  ....
  if (access & FILE_WRITE_ATTRIBUTES)
    output.append(ASCIIToUTF16("\tFILE_WRITE_ATTRIBUTES\n"));
  if (access & FILE_WRITE_DATA)
    output.append(ASCIIToUTF16("\tFILE_WRITE_DATA\n"));
  if (access & FILE_WRITE_EA)
    output.append(ASCIIToUTF16("\tFILE_WRITE_EA\n"));
  if (access & FILE_WRITE_EA)
    output.append(ASCIIToUTF16("\tFILE_WRITE_EA\n"));
  break;
  ....
}

MongoDB

V581 The conditional expressions of the 'if' operators situated alongside each other are identical. Check lines: 44, 46. parallel.h 46


string _server;

bool operator<( const ServerAndQuery& other ) const {
  if ( ! _orderObject.isEmpty() )
    return _orderObject.woCompare( other._orderObject ) < 0;

  if ( _server < other._server )
    return true;
  if ( other._server > _server )
    return false;
  return _extra.woCompare( other._extra ) < 0;
}

"A<B" is the same as "B>A".

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