tracker issue : CF-4010910

Problem Description:
Using expandPath() in OnServerStart throws an error.

Steps to Reproduce:
<cfcomponent output="false" persistent="false">
<cffunction name="OnServerStart" output="false" access="public" returntype="any">
<cflog file="application" text="#expandPath('.')#" />      
</cffunction>
</cfcomponent>


Actual Result:

Throws an error.  This is the dump: 

Message: String index out of range: -1
StackTrace: java.lang.StringIndexOutOfBoundsException: String index out of range: -1
        at java.lang.String.substring(String.java:1955)
        at coldfusion.util.Utils.expandPath(Utils.java:456)
        at coldfusion.runtime.CFPage.ExpandPath(CFPage.java:3629)
        at cfServer2ecfc1204757337$funcCREATEEVENTGATEWAYS.runFunction(c:\users\brian\documents\web\motorsportreg\Server.cfc:65)
        at coldfusion.runtime.UDFMethod.invoke(UDFMethod.java:472)
        at coldfusion.filter.SilentFilter.invoke(SilentFilter.java:47)
        at coldfusion.runtime.UDFMethod$ReturnTypeFilter.invoke(UDFMethod.java:405)
        at coldfusion.runtime.UDFMethod$ArgumentCollectionFilter.invoke(UDFMethod.java:368)
        at coldfusion.filter.FunctionAccessFilter.invoke(FunctionAccessFilter.java:55)
        at coldfusion.runtime.UDFMethod.runFilterChain(UDFMethod.java:321)
        at coldfusion.runtime.UDFMethod.invoke(UDFMethod.java:220)
        at coldfusion.runtime.CfJspPage._invokeUDF(CfJspPage.java:2655)
        at cfServer2ecfc1204757337$funcONSERVERSTART.runFunction(c:\users\brian\documents\web\motorsportreg\Server.cfc:20)
        at coldfusion.runtime.UDFMethod.invoke(UDFMethod.java:472)
        at coldfusion.filter.SilentFilter.invoke(SilentFilter.java:47)
        at coldfusion.runtime.UDFMethod$ReturnTypeFilter.invoke(UDFMethod.java:405)
        at coldfusion.runtime.UDFMethod$ArgumentCollectionFilter.invoke(UDFMethod.java:368)
        at coldfusion.filter.FunctionAccessFilter.invoke(FunctionAccessFilter.java:55)
        at coldfusion.runtime.UDFMethod.runFilterChain(UDFMethod.java:321)
        at coldfusion.runtime.UDFMethod.invoke(UDFMethod.java:220)
        at coldfusion.runtime.TemplateProxy.invoke(TemplateProxy.java:655)
        at coldfusion.runtime.TemplateProxy.invoke(TemplateProxy.java:601)
        at coldfusion.filter.ServerCFCFilter$OnSSLaunchThread.run(ServerCFCFilter.java:175)
Suppressed:
        [array]
TagContext:
        [array]
        1) [struct]
                COLUMN: 0
                ID: CF_CFPAGE
                LINE: 65
                RAW_TRACE: at cfServer2ecfc1204757337$funcCREATEEVENTGATEWAYS.runFunction(c:\users\brian\documents\web\motorsportreg\Server.cfc:65)
                TEMPLATE: c:\users\brian\documents\web\motorsportreg\Server.cfc
                TYPE: CFML
        2) [struct]
                COLUMN: 0
                ID: CF_UDFMETHOD
                LINE: 20
                RAW_TRACE: at cfServer2ecfc1204757337$funcONSERVERSTART.runFunction(c:\users\brian\documents\web\motorsportreg\Server.cfc:20)
                TEMPLATE: c:\users\brian\documents\web\motorsportreg\Server.cfc
                TYPE: CFML
Type: java.lang.StringIndexOutOfBoundsException


Expected Result:

A path name that I can work with.


Any Workarounds:

I understand that it doesn't make sense for expandPath() to be able to access mappings since applications don't exist yet, but surely we should be able to generate relatives paths to the server.cfc file? 

The only possible workaround is to use getDirectoryFromPath(getCurrentTemplatePath()) and append relative paths but this is clunky.

----------------------------- Additional Watson Details -----------------------------

Watson Bug ID:	4010910

External Customer Info:
External Company:  
External Customer Name: Brian
External Customer Email:  
External Test Config: My Hardware and Environment details:



CF10 enterprise on Windows 7.  I suspect it happens elsewhere.

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