Infinite loop in processRule()

[EliotVU]

Hello, your library has been of great use to assist with implementing auto-completion for an old language called "UnrealScript".

However, in UnrealScript we will often stumble on pieces of C++ text blocks, which I solved with the following grammar:

cppText
	: 'cpptext' exportBlockText
	;

// Skips a C++ block of text: "{ ... | { ... }* }
exportBlockText
	: OPEN_BRACE (~(OPEN_BRACE | CLOSE_BRACE)+ | exportBlockText)* CLOSE_BRACE
	;

UCParser.g4#L598

This had worked flawlessly except for c3. When c3 hits the first instance of 'exportBlockText' it will run in an infinite loop with 'processRule'. That may seem obvious given the grammar, any chance this could be fixed, or a possible work around?