Stacktrace when entering search term with unmatched double quotes

[rbsec]

Entering a search term that contains an unmatched number of doulbe-quote characters (") results in a stacktrace (below). If the number of double-quote characters is even (0, 2, 4) it works fine, but having an unmatched one fails. An example search string that causes this error is as follows:

http://[removed]/search?q=zzz"

The site is using an older version of Umbraco (I believe it's 7.1.6), so the line number in the stacktrace (62) doesn't match up the the latest version of Examine (looking at the code I think it should be line 79 in the current version).

I realise this isn't the most helpful bug report - I don't have access to the source of the website, so I'm afraid I can't give any useful information about exact versions of software in use (and won't be able to text a fixed version).

~rbsec

Last Error: System.Web.HttpCompileException
Controller: SearchResultPage
Action: ArticleList
Exception: mscorlib
Length cannot be less than zero. Parameter name: length

System.String.InternalSubStringWithChecks(Int32 startIndex, Int32 length, Boolean fAlwaysCopy)
Examine.StringExtensions.RemoveStopWords(String searchText) in x:\Projects\Examine\Examine\Projects\Examine\StringExtensions.cs:line 62
Umbraco.Extensions.Services.SiteSearchService.GetPagesAndEvents(String searchTerm, Nullable`1 enf, Nullable`1 wildcardMaxLenth)
Umbraco.Extensions.Services.ContentService.SearchResults_viewModelGet(String queryString, Nullable`1 enf, Nullable`1 wildcardMaxLength)
Umbraco.Extensions.Controllers.SearchResultPageController.ArticleList()
lambda_method(Closure , ControllerBase , Object[] )
System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters)