[bug] Sigil doesn't start

un_pogaz · 05-14-2021, 05:30 PM

Sometimes when I try to open an ePub, Sigil does not start.
It is active in the process manager but no UI. It seems to be stuck in an infinite loading (and a little vicious thing the window "incorrect formatting" is displayed normally, it is after that it blocks)

This has happened countless times, and I've tried the most voodoo and twisted solutions that I know (and that I wouldn't share on this public forum), sometimes with success, sometimes not.

And today, I finally found the origin of the bug...
one line.
A single **** line is enough to completely block Sigil.

Code:

<item href="../META-INF/com.apple.ibooks.display-options.xml" id="id1" media-type="application/xml"/>

At the moment I deleted this line, miracle, problem solved.

The worst is that, technically, this line is VALID, normal that I struggle to find it.
So I understand the strategy of not indexing in the <manifest> the third-party files present in the META-INF folder, such as the com.apple.ibooks.display-options.xml, but make sure that if such a <item> exists, that it does not soft-lock Sigil at its opening.

(sorry that a'm a bit rough, but I've been banging my head against the wall for over a year because of him)

Doitsu · 05-14-2021, 05:45 PM

Quote:

Originally Posted by un_pogaz

Code:

<item href="../META-INF/com.apple.ibooks.display-options.xml" id="id1" media-type="application/xml"/>

At the moment I deleted this line, miracle, problem solved.

The worst is that, technically, this line is VALID, normal that I struggle to find it.

AFAIK, this line is not valid, because none of the files in META-INF are supposed to be manifested.

DiapDealer · 05-14-2021, 06:25 PM

Definitely shouldn't be manifested, but it probably shouldn't prevent Sigil from starting if it is, either.

KevinH · 05-14-2021, 06:26 PM

Yes Sigil will ignore files in the Meta-Inf during load but will walk the manifest and try to load everything there and this most likely causes a blockage that will not resolve itself.

It is an illegal line as Doitsu pointed out.

I will add code to skip reading anything in the manifest that points into the Meta-Inf.

And add an illegal manifest error message.

KevinH · 05-14-2021, 06:48 PM

Also if you run into strange Sigil issues, you can always post the problem epub someplace private and pm either DiapDealer or KevinH with a link, and we would be happy to track down the issue since we can enable debug output in the ImportEPUB routine to see issues like this one much faster.

KevinH · 05-14-2021, 08:03 PM

Just pushed a fix to master to skip trying to load manifested files that exist inside the META-INF folder. A load warning with the illegal manifest entry is generated. Tested and it now loads the my test version of this broken epub.

KevinH · 05-14-2021, 08:06 PM

Also pushed a new base for translations because of the new error message.

un_pogaz · 05-15-2021, 11:20 AM

@Doitsu Ah, I did not know that. I thought that all files, excluding some exceptions defined in the standard should be manifested, including those in the META-INF if those are not the above mentioned specials.

Yes, it's true that I could ask for help, but I never think about it.
Thanks.

05-14-2021, 05:30 PM	#1
un_pogaz Chalut o/ Posts: 437 Karma: 145424 Join Date: Dec 2017 Device: Kobo	[bug] Sigil doesn't start Sometimes when I try to open an ePub, Sigil does not start. It is active in the process manager but no UI. It seems to be stuck in an infinite loading (and a little vicious thing the window "incorrect formatting" is displayed normally, it is after that it blocks) This has happened countless times, and I've tried the most voodoo and twisted solutions that I know (and that I wouldn't share on this public forum), sometimes with success, sometimes not. And today, I finally found the origin of the bug... one line. A single **** line is enough to completely block Sigil. Code: <item href="../META-INF/com.apple.ibooks.display-options.xml" id="id1" media-type="application/xml"/> At the moment I deleted this line, miracle, problem solved. The worst is that, technically, this line is VALID, normal that I struggle to find it. So I understand the strategy of not indexing in the <manifest> the third-party files present in the META-INF folder, such as the com.apple.ibooks.display-options.xml, but make sure that if such a <item> exists, that it does not soft-lock Sigil at its opening. (sorry that a'm a bit rough, but I've been banging my head against the wall for over a year because of him) Last edited by un_pogaz; 05-14-2021 at 05:34 PM.

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05-14-2021, 06:25 PM	#3
DiapDealer Grand Sorcerer Posts: 28,356 Karma: 203720150 Join Date: Jan 2010 Device: Nexus 7, Kindle Fire HD	Definitely shouldn't be manifested, but it probably shouldn't prevent Sigil from starting if it is, either.

05-14-2021, 06:26 PM	#4
KevinH Sigil Developer Posts: 8,475 Karma: 5703586 Join Date: Nov 2009 Device: many	Yes Sigil will ignore files in the Meta-Inf during load but will walk the manifest and try to load everything there and this most likely causes a blockage that will not resolve itself. It is an illegal line as Doitsu pointed out. I will add code to skip reading anything in the manifest that points into the Meta-Inf. And add an illegal manifest error message.

05-14-2021, 06:48 PM	#5
KevinH Sigil Developer Posts: 8,475 Karma: 5703586 Join Date: Nov 2009 Device: many	Also if you run into strange Sigil issues, you can always post the problem epub someplace private and pm either DiapDealer or KevinH with a link, and we would be happy to track down the issue since we can enable debug output in the ImportEPUB routine to see issues like this one much faster.

05-14-2021, 08:03 PM	#6
KevinH Sigil Developer Posts: 8,475 Karma: 5703586 Join Date: Nov 2009 Device: many	Just pushed a fix to master to skip trying to load manifested files that exist inside the META-INF folder. A load warning with the illegal manifest entry is generated. Tested and it now loads the my test version of this broken epub.

05-14-2021, 08:06 PM	#7
KevinH Sigil Developer Posts: 8,475 Karma: 5703586 Join Date: Nov 2009 Device: many	Also pushed a new base for translations because of the new error message.

05-15-2021, 11:20 AM	#8
un_pogaz Chalut o/ Posts: 437 Karma: 145424 Join Date: Dec 2017 Device: Kobo	@Doitsu Ah, I did not know that. I thought that all files, excluding some exceptions defined in the standard should be manifested, including those in the META-INF if those are not the above mentioned specials. Yes, it's true that I could ask for help, but I never think about it. Thanks.

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