Ошибка: IndexSizeError: Index or size is negative or greater than the allowed amount
Строка: 89

//  Настройка функций кликов мыши для кнопки .............
this.onclick =e=> {
   
   if ( e.button == 0 ) summar(); // ЛКМ
         
   if ( e.button == 1 ) gShowPopup(this); // СКМ 
        
   if ( e.button == 2 && !e.ctrlKey && !e.shiftKey && !e.altKey && !e.metaKey ) { // ПКМ
        e.preventDefault();
        sum = 0;
        }
};


var sum = 0;


// Подсказка для кнопки .............
this.onmouseover =()=> {
   this.tooltipText = "Л: Подсчитать \nС: CB меню \nП: Сбросить \nИтоговая сумма: " + sum;                                                    
};


function summar() {
   var sel = document.commandDispatcher.focusedWindow.getSelection().toString();
   var nums = sel.split(/\s+/);
   
   nums.forEach(num=> {
      num = +num;
      if ( isFinite(num) ) sum += num;
   });

   sum = fixPrecision(sum);
    //alert(sum);
};


function fixPrecision(n) {
   // Try fix "bugs" with floating point operations
   // E.g. 0.3/0.1 = 2.9999999999999995
   return n.toPrecision(13).toString()
           .replace(/\.0+(e|$)/, "$1") // 1.000 and 1.000e5 => 1
           .replace(/(\.\d*[^0])0+(e|$)/, "$1$2"); // 1.200 and 1.200e5 => 1.2
};

Application Basics
------------------

Name: Firefox
Version: 49.0.2
Build ID: 20161019084923
Update Channel: release
User Agent: Mozilla/5.0 (Windows NT 6.1; rv:49.0) Gecko/20100101 Firefox/49.0
OS: Windows_NT 6.1
Multiprocess Windows: 0/1 (Disabled by add-ons)
Safe Mode: false

Crash Reports for the Last 3 Days
---------------------------------

All Crash Reports

Extensions
----------

Name: Custom Buttons
Version: 0.0.5.8.9
Enabled: true
ID: custombuttons@xsms.org

Name: Mozilla Archive Format
Version: 4.0.1
Enabled: true
ID: {7f57cf46-4467-4c2d-adfa-0cba7c507e54}

Name: Multi-process staged rollout
Version: 1.3
Enabled: true
ID: e10srollout@mozilla.org

Name: Pocket
Version: 1.0.4
Enabled: true
ID: firefox@getpocket.com

Name: Web Compat
Version: 1.0
Enabled: true
ID: webcompat@mozilla.org

Graphics
--------

Features
Compositing: Basic
Asynchronous Pan/Zoom: none
WebGL Renderer: Google Inc. -- ANGLE (Intel(R) Graphics Media Accelerator 3600 Series Direct3D9Ex vs_3_0 ps_3_0)
Hardware H264 Decoding: No; Hardware video decoding disabled or blacklisted
DirectWrite: false (6.1.7601.17563)
GPU #1
Active: Yes
Description: Intel(R) Graphics Media Accelerator 3600 Series
Vendor ID: 0x8086
Device ID: 0x0be1
Driver Version: 8.14.8.1091
Driver Date: 3-15-2013
Drivers: igdumd32
Subsys ID: 00000000
RAM: Unknown

Diagnostics
AzureCanvasAccelerated: 0
AzureCanvasBackend: skia
AzureContentBackend: cairo
AzureFallbackCanvasBackend: cairo
failures: [GFX1-]: [D3D11] create component blender failed: 0x80070057, 0
Decision Log
D3D9_COMPOSITING:
disabled by default: Disabled by default
DIRECT2D:
unavailable by runtime: Failed to acquire a Direct2D 1.1 factory
D3D11_HW_ANGLE:
broken by runtime: RenderTargetViews need recreating


Failure Log
(#0) Error: [D3D11] create component blender failed: 0x80070057, 0
(#1) Error: [D3D11] create component blender failed: 0x80070057, 0
(#2) Error: [D3D11] create component blender failed: 0x80070057, 0
(#3) Error: [D3D11] create component blender failed: 0x80070057, 0
(#4) Error: [D3D11] create component blender failed: 0x80070057, 0
(#5) Error: [D3D11] create component blender failed: 0x80070057, 0
(#6) Error: [D3D11] create component blender failed: 0x80070057, 0
(#7) Error: [D3D11] create component blender failed: 0x80070057, 0
(#8) Error: [D3D11] create component blender failed: 0x80070057, 0

Important Modified Preferences
------------------------------

browser.cache.disk.capacity: 0
browser.cache.disk.filesystem_reported: 1
browser.cache.disk.smart_size.enabled: false
browser.cache.disk.smart_size.first_run: false
browser.cache.frecency_experiment: 3
browser.download.importedFromSqlite: true
browser.download.useDownloadDir: false
browser.places.importBookmarksHTML: false
browser.places.smartBookmarksVersion: 8
browser.sessionstore.upgradeBackup.latestBuildID: 20161019084923
browser.startup.homepage_override.buildID: 20161019084923
browser.startup.homepage_override.mstone: 49.0.2
browser.tabs.remote.autostart.2: true
browser.urlbar.daysBeforeHidingSuggestionsPrompt: 3
browser.urlbar.lastSuggestionsPromptDate: 20161119
dom.apps.lastUpdate.buildID: 20161019084923
dom.apps.lastUpdate.mstone: 49.0.2
dom.apps.reset-permissions: true
extensions.lastAppVersion: 49.0.2
gfx.crash-guard.d3d11layers.appVersion: 49.0.2
gfx.crash-guard.d3d11layers.deviceID: 0x0be1
gfx.crash-guard.d3d11layers.driverVersion: 8.14.8.1091
gfx.crash-guard.d3d11layers.feature-d2d: true
gfx.crash-guard.d3d11layers.feature-d3d11: true
gfx.crash-guard.status.d3d11layers: 2
media.gmp-manager.buildID: 20161019084923
media.gmp.storage.version.observed: 1
media.hardware-video-decoding.failed: false
network.cookie.prefsMigrated: true
network.predictor.cleaned-up: true
places.history.expiration.transient_current_max_pages: 53376
plugin.disable_full_page_plugin_for_types: application/pdf
plugin.importedState: true

Important Locked Preferences
----------------------------

Places Database
---------------

JavaScript
----------

Incremental GC: true

Accessibility
-------------

Activated: false
Prevent Accessibility: 0

Library Versions
----------------

NSPR
Expected minimum version: 4.12
Version in use: 4.12

NSS
Expected minimum version: 3.25
Version in use: 3.25

NSSSMIME
Expected minimum version: 3.25
Version in use: 3.25

NSSSSL
Expected minimum version: 3.25
Version in use: 3.25

NSSUTIL
Expected minimum version: 3.25
Version in use: 3.25

Experimental Features
---------------------