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- Subject: Re: Lua 5.3.4 and LPeg 1.0.1 dumped core on me
- From: Andrew Gierth <andrew@...>
- Date: Tue, 13 Nov 2018 19:45:14 +0000
>>>>> "Albert" == Albert Chan <email@example.com> writes:
>> Here is a small testcase (note that shortening the string eliminates the
>> local lpeg = require 'lpeg'
>> local P,Cs,Cmt = lpeg.P, lpeg.Cs, lpeg.Cmt
>> local pat1 = P"a" / "b" + Cmt(P"c", function(_,p) return p,"d" end) + P(1)
>> local pat = Cs(pat1^1)
Albert> What is above test code supposed to show ?
Albert> I tried it on lpeg 1.0.1 without problem ...
With what output? on what platform? have you modified INITCAPSIZE?
When I run it (barring the stray ' at the end) I get the error "not
enough memory for buffer allocation" (because it's trying to allocate
nearly 2^64 bytes due to a bogus pointer value).
Albert> OTTH, if string is longer than ('abcd'):rep(5510), it did
Albert> *crash* Your 1 char patch, (n + 2) to (n + 1) seems to fix it.
The bug does depend on the state of newly-allocated memory (the contents
of a lua full userdata) so it may not be entirely predictable.