Hi, I am currently struggling with understanding why my SmaCC parser refuses to parse a rather simple language. Grammar and example are below. The language consists of multiple leak reports, separated by two newlines. Each leak report has a type and object and byte size on the first line. Then comes a stack of indented frames with addresses, and method and source location if available. Somehow my parser always fails because it trying to scan the whole string as <method>. I am struggling with this since hours but not making any progress. How do I need to rewrite the grammar so that the scanner produces the right tokens for the parser? I understand that the <method> token use in Source is problematic, because it needs to match until the last word. But I cannot find a way to write it in another way or tweak the parser attributes to figure out the right tokenization. Anybody has some hints? I would greatly appreciate it. Cheers, Manuel Example: LeReParser parse: 'Indirect leak of 8 byte(s) in 1 object(s) allocated from: #0 0x106be248c in wrap_malloc (libclang_rt.asan_osx_dynamic.dylib:x86_64h+0x5d48c) #1 0x12193989d in moz_xmalloc mozalloc.cpp:83 #2 0x11fc8200d in std::__1::vector<unsigned int, std::__1::allocator<unsigned int> >::__append(unsigned long) mozalloc.h:194 #3 0x11fc80d5a in mozilla::gfx::GradientStopsSkia::GradientStopsSkia(std::__1::vector<mozilla::gfx::GradientStop, std::__1::allocator<mozilla::gfx::GradientStop> > const&, unsigned int, mozilla::gfx::ExtendMode) vector:2041 #4 0x11fc6f1dc in mozilla::gfx::DrawTargetSkia::CreateGradientStops(mozilla::gfx::GradientStop*, unsigned int, mozilla::gfx::ExtendMode) const DrawTargetSkia.cpp:62 #5 0x122236b1e in create_gradient_stops(mozilla::gfx::DrawTarget*, float*, unsigned int, mozilla::gfx::ExtendMode) pattern.cpp:98 #6 0x122236323 in moz2d_pattern_linear_gradient_create_flat pattern.cpp:40 #7 0x1069cf901 in primitiveCalloutWithArgs (Pharo:x86_64+0x1003a5901) #8 0x10669e222 in primitiveExternalCall gcc3x-cointerp.c:76887 #9 0x106694aed in executeNewMethod gcc3x-cointerp.c:22341 #10 0x10669a403 in ceSendsupertonumArgs gcc3x-cointerp.c:16540 #11 0x11043c134 (<unknown module>) #12 0x10662d712 in interpret gcc3x-cointerp.c:2754 #13 0x1068b2ada in -[sqSqueakMainApplication runSqueak] sqSqueakMainApplication.m:201 #14 0x7fffc93786fc in __NSFirePerformWithOrder (Foundation:x86_64+0xd76fc) #15 0x7fffc78cfc56 in __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ (CoreFoundation:x86_64h+0xa6c56) #16 0x7fffc78cfbc6 in __CFRunLoopDoObservers (CoreFoundation:x86_64h+0xa6bc6) #17 0x7fffc78b05f8 in __CFRunLoopRun (CoreFoundation:x86_64h+0x875f8) #18 0x7fffc78b0033 in CFRunLoopRunSpecific (CoreFoundation:x86_64h+0x87033) #19 0x7fffc6e10ebb in RunCurrentEventLoopInMode (HIToolbox:x86_64+0x30ebb) #20 0x7fffc6e10bf8 in ReceiveNextEventCommon (HIToolbox:x86_64+0x30bf8) #21 0x7fffc6e10b25 in _BlockUntilNextEventMatchingListInModeWithFilter (HIToolbox:x86_64+0x30b25) #22 0x7fffc53a5a53 in _DPSNextEvent (AppKit:x86_64+0x46a53) #23 0x7fffc5b217ed in -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] (AppKit:x86_64+0x7c27ed) #24 0x7fffc539a3da in -[NSApplication run] (AppKit:x86_64+0x3b3da) #25 0x7fffc5364e0d in NSApplicationMain (AppKit:x86_64+0x5e0d) #26 0x7fffdd0a2234 in start (libdyld.dylib:x86_64+0x5234) '. Grammar: %prefix LeRe; %suffix Node; %root Report; <newline> : \r \n? | \n ; <number> : \d+ ; <index> : \# \d+ ; <address> : 0 x [0-9a-f]+ ; <method> : [^\r\n]+ ; <file> : \S+ ; Report : Leaks 'leaks' { leaks } ; Leaks : Leak 'leak' { { leak } } | Leaks 'leaks' Leak 'leak' { leaks , { leak } } ; Leak : LeakType 'type' <number> 'bytes' " byte(s) in " <number> 'objects' " object(s) allocated from:" <newline> Stack 'stack' <newline> { { type . bytes value . objects value . stack } } ; LeakType : "Indirect leak of " { #indirect } | "Direct leak of " { #direct } ; Stack : Frames 'frames' { frames } ; Frames : Frame 'frame' { { frame } } | Frames 'frames' Frame 'frame' { frames , { frame } } ; Frame : " " <index> " " <address> " " Source 'source' <newline> { source } ; Source : " (<unknown module>)" { #unknown } | "in " <method> 'method' " " <file> 'file' { { method value . file value } } ;