hi. please turn on -Xwatchdfaconversion and see which decision kills it. this 
is rare but not impossible.  Then, add backtrack=true and k=1 options to that 
decision to resolve.  or restructure that decision.

Please report back on success.

Ter

On Dec 1, 2010, at 5:16 AM, Rene Vestergaard wrote:

> Fellow ANTLRs,
> 
> My biggest .g file (~850 lines) appears to send 3.3 into an infinite 
> loop (>10mins) that keeps allocating heap space (>3GBs).
> 
> On 3.2, the same task takes a few seconds and around 100MB.
> 
> Any advice on how to pinpoint the problem?
> 
> Cheers,
> Rene
> 
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