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This smells like something to try valgrind on. Try
make test.valgrind
On 11/07/2016 05:59 PM, James E Keenan via RT wrote:
> On Mon, 07 Nov 2016 16:29:40 GMT, jkeenan wrote:
>> On Mon, 07 Nov 2016 13:47:55 GMT, jkeenan wrote:
>>> The question is: What is it about this the pattern:
>>>
>>> #####
>>> /([^\S\x{202f}\x{00a0}]+)|(\p{InFullwidth})|((?:[^\s\p{InFullwidth}]|[\x{202f}\x{00a0}])+)/
>>> #####
>>>
>>> ... that (a) as of commit C<a5540cf> but not previously; and (b) in
>>> the context of this test suite but not in isolation, perceives
>>> something to be a read-only value not subject to modification?
>> My next brainstorm: Add "use re 'debug';" to sub add_text() in
>> tp/Texinfo/Convert/ParagraphNonXS.pm.
>>
>> When I did so and ran the debugging program found in one of my
>> previous attachments, I got this output:
>>
>> #####
>> Texinfo::Convert::ParagraphNonXS::add_text(../../tp/Texinfo/Convert/ParagraphNonXS.pm:329):
>> 329: my @segments = split
>> 330:
>> /([^\S\x{202f}\x{00a0}]+)|(\p{InFullwidth})|((?:[^\s\p{InFullwidth}]|[\x{202f}\x{00a0}])+)/,
>> 331: $text;
>> DB<6> n
>> Matching REx
>> "([^\S\x{202f}\x{00a0}]+)|(\p{InFullwidth})|((?:[^\s\p{InFull"...
>> against "This is "
>> 0 <> <This is > | 0| 1:BRANCH(18)
>> 0 <> <This is > | 1| 2:OPEN1(4)
>> 0 <> <This is > | 1| 4:PLUS(16)
>> | 1| ANYOF[\t\n\x0B\f\r \x85][1680
>> 2000-200A 2028-2029 205F 3000] can match 0 times out of 2147483647...
>> | 1| failed...
>> 0 <> <This is > | 0| 18:BRANCH(34)
>> 0 <> <This is > | 1| 19:OPEN2(21)
>> 0 <> <This is > | 1|
>> 21:ANYOF[+utf8::Texinfo::Convert::ParagraphNonXS::InFullwidth](32)
>> | 1| failed...
>> 0 <> <This is > | 0| 34:BRANCH(68)
>> 0 <> <This is > | 1| 35:OPEN3(37)
>> 0 <> <This is > | 1| 37:CURLYM[0]{1,INFTY}(66)
>> 0 <> <This is > | 2| 39:BRANCH(51)
>> 0 <> <This is > | 3| 40:ANYOF[^\t\n\x0B\f\r
>> \x85\xA0{+utf8::Texinfo::Convert::ParagraphNonXS::InFullwidth}1680
>> 2000-200A 2028-2029 202F 205F 3000](64)
>> Modification of a read-only value attempted at
>> ../../tp/Texinfo/Convert/ParagraphNonXS.pm line 329.
>> at ../../tp/Texinfo/Convert/ParagraphNonXS.pm line 329.
>> Texinfo::Convert::ParagraphNonXS::add_text(Texinfo::Convert::ParagraphNonXS=HASH(0x35ba938),
>> "This is ") called at ../../tp/Texinfo/Convert/Info.pm line 308
>> Texinfo::Convert::Info::_info_header(Texinfo::Convert::Info=HASH(0x35b3038))
>> called at ../../tp/Texinfo/Convert/Info.pm line 81
>> Texinfo::Convert::Info::output(Texinfo::Convert::Info=HASH(0x35b3038),
>> HASH(0x35ab7c0)) called at ../texi2any.pl line 1348
>> panic: POPSTACK
>> Debugged program terminated.
>> #####
>>
>> Since I have never previously used the regex debugger, I have no idea
>> if there are any clues to a solution in that output.
>>
> Compiling perl at what has been identified as the last good commit, and then running the test program through the debugger, I got much better output. It's quite long, so I'm posting it here:
>
> https://gist.github.com/jkeenan/184d2aaf914e4aa0410fe2ea1f36da91
>
> Thank you very much.
>
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