jQuery exception logic flow examples... the "assert" function is being called in a couple places. Most of them are to detect Opera and/or other odd browsers. I highlighted the error lines with "/***************** ERROR ON NEXT LINE ****************/" It seems to me that they should already know if they're running a browser that requires this fea…

gistfile1.js

// jquery 2.0.2 line 1192+
function assert( fn ) {
  var div = document.createElement("div");

	try {
		return !!fn( div );
	} catch (e) {
		return false;
	} finally {
		// Remove from its parent by default
		if ( div.parentNode ) {
			div.parentNode.removeChild( div );
		}
		// release memory in IE
		div = null;
	}
}



// jQuery 2.0.2 line 1549+
  	assert(function( div ) {

			// Support: Opera 10-12/IE8
			// ^= $= *= and empty values
			// Should not select anything
			// Support: Windows 8 Native Apps
			// The type attribute is restricted during .innerHTML assignment
			var input = doc.createElement("input");
			input.setAttribute( "type", "hidden" );
			div.appendChild( input ).setAttribute( "t", "" );

			if ( div.querySelectorAll("[t^='']").length ) {
				rbuggyQSA.push( "[*^$]=" + whitespace + "*(?:''|\"\")" );
			}

			// FF 3.5 - :enabled/:disabled and hidden elements (hidden elements are still enabled)
			// IE8 throws error here and will not see later tests
			if ( !div.querySelectorAll(":enabled").length ) {
				rbuggyQSA.push( ":enabled", ":disabled" );
			}

			// Opera 10-11 does not throw on post-comma invalid pseudos
      /*****************  ERROR ON NEXT LINE ****************/
      // SCRIPT5022: Exception was thrown at line 1571, column 4 in ms-appx://c33865be-41fa-45ec-b8f3-4d25e60ad0f3/Scripts/jquery-2.0.2.js 0x800a139e - JavaScript runtime error: SyntaxError
			div.querySelectorAll("*,:x");
			rbuggyQSA.push(",.*:");
		});
    
    // jquery 2.0.2 line 1581+
      	assert(function( div ) {
			// Check to see if it's possible to do matchesSelector
			// on a disconnected node (IE 9)
			support.disconnectedMatch = matches.call( div, "div" );

			// This should fail with an exception
			// Gecko does not error, returns false instead
      /*****************  ERROR ON NEXT LINE ****************/
      //SCRIPT5022: Exception was thrown at line 1588, column 4 in ms-appx://c33865be-41fa-45ec-b8f3-4d25e60ad0f3/Scripts/jquery-2.0.2.js 0x800a139e - JavaScript runtime error: SyntaxError
			matches.call( div, "[s!='']:x" );  
			rbuggyMatches.push( "!=", pseudos );
		});

Don't break on caught exceptions. We caught it because we expected it.

• https://bugs.jquery.com/ticket/13881
• https://bugs.jquery.com/ticket/14123