[stringtemplate-interest] [ST4-Beta2] NullPointerException in Interpreter.storeArgs

[Udo Borkowski]

A NPE may occur in void storeArgs(ST self, Map<String,Object> attrs, ST st).

formalArguments in

if ( !st.impl.formalArguments.containsKey(argName) ) {
	errMgr.runTimeError(self,
				current_ip,
				ErrorType.NO_SUCH_ATTRIBUTE,
				argName);
	continue;
}

may be null, thus generating the NPE.



Possible fix:

if ( st.impl.formalArguments == null || !st.impl.formalArguments.containsKey(argName) ) {
	errMgr.runTimeError(self,
				current_ip,
				ErrorType.NO_SUCH_ATTRIBUTE,
				argName);
	continue;
}


Udo

P.S.: This (invalid) definition will generate the NPE:

main(p) ::= <<
<f(x="abc")>
>>

f(x) ::= <<
<x
>>

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