tracker issue : CF-3740276

implicit struct|array overrides short-circuiting

Steps to reproduce:

 
{code}
<cfscript>
 function bar(){
 writeDump(ARGUMENTS);
 abort; 
 }
 
if(structKeyExists(variables, "foo") and bar({something=variables.foo})){
	writeOutput("example 1");}//exception: Element FOO is undefined in VARIABLES.
	if(structKeyExists(variables, "foo") and bar([variables.foo])){
		writeOutput("example 2");
	}//exception: Element FOO is undefined in VARIABLES.
	if(structKeyExists(variables, "foo") and invoke("", "bar", {something=variables.foo})){
		writeOutput("example 3");
	}//exception: Element FOO is undefined in VARIABLES
	if(structKeyExists(variables, "foo") and invoke("", "bar", [variables.foo])){
		writeOutput("example 4");
	}//exception: Element FOO is undefined in VARIABLES
</cfscript>
{code}
 

bar() is never called (good) but the implicit struct and array are evaluated (bad)

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

Watson Bug ID: 3740276

External Customer Info:
 External Company: 
 External Customer Name: itisdesign
 External Customer Email:

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