Examples of errors detected by the V766 diagnostic

V766. An item with the same key has already been added.

Chromium

V766 An item with the same key '"colorSectionBorder"' has already been added. ntp_resource_cache.cc 581

void NTPResourceCache::CreateNewTabCSS()
{
  ....
  // Colors.
  substitutions["colorBackground"] =
    SkColorToRGBAString(color_background);
  substitutions["backgroundBarDetached"] =
    GetNewTabBackgroundCSS(tp, false);
  substitutions["backgroundBarAttached"] =
    GetNewTabBackgroundCSS(tp, true);
  substitutions["backgroundTiling"] =
    GetNewTabBackgroundTilingCSS(tp);
  substitutions["colorTextRgba"] =
    SkColorToRGBAString(color_text);
  substitutions["colorSectionBorder"] =
      SkColorToRGBAString(color_section_border); // <=
  substitutions["colorTextLight"] =
    SkColorToRGBAString(color_text_light);
  substitutions["colorSectionBorder"] =
      SkColorToRGBComponents(color_section_border); // <=
  substitutions["colorText"] =
    SkColorToRGBComponents(color_text);
  ....
}

MuseScore

V766 An item with the same key '"mrcs"' has already been added. importgtp-gp6.cpp 100

const static std::map<QString, QString> instrumentMapping = {
  ....
  {"e-piano-gs", "electric-piano"},
  {"e-piano-ss", "electric-piano"},
  {"hrpch-gs", "harpsichord"},
  {"hrpch-ss", "harpsichord"},
  {"mrcs", "maracas"},                // <=
  {"mrcs", "oboe"},                   // <=
  {"mrcs", "oboe"},                   // <= using of Copy-Paste
  ....
};

Android

V766 CWE-462 An item with the same key '"oem_lpass_cfg"' has already been added. bootstat.cpp 264

const std::map<std::string, int32_t> kBootReasonMap = {
    ....
    {"watchdog_sdi_apps_reset", 106},
    {"smpl", 107},
    {"oem_modem_failed_to_powerup", 108},
    {"reboot_normal", 109},
    {"oem_lpass_cfg", 110},                           // <=
    {"oem_xpu_ns_error", 111},                        // <=
    {"power_key_press", 112},
    {"hardware_reset", 113},
    {"reboot_by_powerkey", 114},
    {"reboot_verity", 115},
    {"oem_rpm_undef_error", 116},
    {"oem_crash_on_the_lk", 117},
    {"oem_rpm_reset", 118},
    {"oem_lpass_cfg", 119},                           // <=
    {"oem_xpu_ns_error", 120},                        // <=
    {"factory_cable", 121},
    {"oem_ar6320_failed_to_powerup", 122},
    {"watchdog_rpm_bite", 123},
    {"power_on_cable", 124},
    {"reboot_unknown", 125},
    ....
};

Similar errors can be found in some other places:

• V766 CWE-462 An item with the same key '"oem_xpu_ns_error"' has already been added. bootstat.cpp 265

NCBI Genome Workbench

V766 An item with the same key 'kArgRemote' has already been added. blast_args.cpp 3262

void
CBlastAppArgs::x_IssueWarningsForIgnoredOptions(const CArgs& args)
{
  set<string> can_override;
  ....
  can_override.insert(kArgOutputFormat);
  can_override.insert(kArgNumDescriptions);
  can_override.insert(kArgNumAlignments);
  can_override.insert(kArgMaxTargetSequences);
  can_override.insert(kArgRemote);               // <=
  can_override.insert(kArgNumThreads);
  can_override.insert(kArgInputSearchStrategy);
  can_override.insert(kArgRemote);               // <=
  can_override.insert("remote_verbose");
  can_override.insert("verbose");
  ....
}

RPCS3

V766 An item with the same key '0x120' has already been added. evdev_joystick_handler.h 135

class evdev_joystick_handler final : public PadHandlerBase
{
  const std::unordered_map<u32, std::string> button_list =
  {
    // ....
    { 0x11d               , "0x11d"       },
    { 0x11e               , "0x11e"       },
    { 0x11f               , "0x11f"       },
    { BTN_JOYSTICK        , "Joystick"    }, // <=
    { BTN_TRIGGER         , "Trigger"     }, // <=
    { BTN_THUMB           , "Thumb"       },
    { BTN_THUMB2          , "Thumb 2"     },
    { BTN_TOP             , "Top"         },
    { BTN_TOP2            , "Top 2"       },
    { BTN_PINKIE          , "Pinkie"      },
    // ....
  }
}

At first glance at code, it is not clear which two keys are the same. It turns out that BTN_JOYSTICK and BTN_TRIGGER are Linux API constants that equals 0x120. (https://elixir.bootlin.com/linux/latest/source/include/uapi/linux/input-event-codes.h#L365) BTN_JOYSTICK is the starting value of the joystick signal constant group and BTN_TRIGGER is the very first constant in the list of that group. Therefore, their values are the same.

CodeLite

V766 An item with the same key ''.'' has already been added. wxCodeCompletionBoxManager.cpp:19

std::unordered_set<wxChar> delimiters =
  { ':', '@', '.', '!', ' ', '\t', '.', '\\',
    '+', '*', '-', '<', '>', '[', ']', '(',
    ')', '{', '}',  '=', '%', '#', '^', '&',
    '\'', '"', '/', '|',  ',', '~', ';', '`' };

Similar errors can be found in some other places:

• V766 An item with the same key '"MSYS2/GCC"' has already been added. compiler.cpp:621, compiler.cpp:620