Digraphs crashes on my Windows 10 laptop when computing ChromaticNumber

[lhsoicher]

The following leads to a crash on my Windows 10 Home HP Pavilion Pentium 4415U 4GB laptop. GAP was installed using the gap-4.10.2.exe installer.

I think the problem is in computing a graph homomorphism.
Thanks for looking into this.

 ┌───────┐   GAP 4.10.2 of 19-Jun-2019
 │  GAP  │   https://www.gap-system.org
 └───────┘   Architecture: i686-pc-cygwin-default32-kv3
 Configuration:  gmp 6.1.2, readline
 Loading the library and packages ...
 Packages:   AClib 1.3.1, Alnuth 3.1.1, AtlasRep 2.1.0, AutoDoc 2019.05.20, AutPGrp 1.10, Browse 1.8.8, CRISP 1.4.4,
             Cryst 4.1.19, CrystCat 1.1.9, CTblLib 1.2.2, FactInt 1.6.2, FGA 1.4.0, Forms 1.2.5, GAPDoc 1.6.2,
             genss 1.6.5, IO 4.6.0, IRREDSOL 1.4, LAGUNA 3.9.3, orb 4.8.2, Polenta 1.3.8, Polycyclic 2.14,
             PrimGrp 3.3.2, RadiRoot 2.8, recog 1.3.2, ResClasses 4.7.2, SmallGrp 1.3, Sophus 1.24, SpinSym 1.5.1,
             TomLib 1.2.8, TransGrp 2.0.4, utils 0.63
 Try '??help' for help. See also '?copyright', '?cite' and '?authors'
gap> LoadPackage("digraphs");
─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
Loading  GRAPE 4.8.2 (GRaph Algorithms using PErmutation groups)
by Leonard H. Soicher (http://www.maths.qmul.ac.uk/~lsoicher/).
Homepage: https://gap-packages.github.io/grape
─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
Loading  Digraphs 0.15.2 (Digraphs - Methods for digraphs)
by Jan De Beule (http://homepages.vub.ac.be/~jdbeule/),
   Julius Jonusas (http://www-groups.mcs.st-andrews.ac.uk/~julius/),
   James Mitchell (http://goo.gl/ZtViV6),
   Michael Torpey (http://www-groups.mcs.st-andrews.ac.uk/~mct25/), and
   Wilf Wilson (http://wilf.me).
Homepage: https://gap-packages.github.io/Digraphs
─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
true
gap> J:=JohnsonDigraph(4,2);
<digraph with 6 vertices, 24 edges>
gap> ChromaticNumber(J);

[james-d-mitchell]

Thanks for the report @lhsoicher. Can you please try with the most recently released version of Digraphs (v1.1.1) because I think we may have already fixed this issue?

[lhsoicher]

I think I would need to wait for the next release of GAP and use the .exe installer for Windows in order to get a newer compiled version of Digraphs to run on my Windows laptop. That's ok. I can wait.

---

From: James Mitchell [email protected] Sent: 26 February 2020 12:16 To: gap-packages/Digraphs Cc: Leonard Soicher; Mention Subject: Re: [gap-packages/Digraphs] Digraphs crashes on my Windows 10 laptop when computing ChromaticNumber (#295)

Thanks for the report @lhsoicherhttps://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Flhsoicher&data=02%7C01%7C%7C66cfd652484c49a7351f08d7bab5bf43%7C569df091b01340e386eebd9cb9e25814%7C0%7C1%7C637183162063667469&sdata=CCoBtC0j33GF9vhZsJe%2BJ9IHqH1t0%2BndrzQB2rhuK6M%3D&reserved=0. Can you please try with the most recently released version of Digraphs (v1.1.1) because I think we may have already fixed this issue?

— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHubhttps://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fgap-packages%2FDigraphs%2Fissues%2F295%3Femail_source%3Dnotifications%26email_token%3DABXNAOEW6KTFG5U2X4EV3BDREZMSZA5CNFSM4K4DA5S2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEM7772A%23issuecomment-591396840&data=02%7C01%7C%7C66cfd652484c49a7351f08d7bab5bf43%7C569df091b01340e386eebd9cb9e25814%7C0%7C1%7C637183162063667469&sdata=yJvV63rI6iWGgXPiG0k21CB0ZOggZ%2BVFITXh45UqfCo%3D&reserved=0, or unsubscribehttps://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fnotifications%2Funsubscribe-auth%2FABXNAOF2O6X6DDFCI3SFTVDREZMSZANCNFSM4K4DA5SQ&data=02%7C01%7C%7C66cfd652484c49a7351f08d7bab5bf43%7C569df091b01340e386eebd9cb9e25814%7C0%7C1%7C637183162063677425&sdata=yF%2FcJSSMNht8wtpKobLjv%2FI1AdcGcIx7Tx0TrH1aczg%3D&reserved=0.

[james-d-mitchell]

@lhsoicher GAP 4.11 is released with Digraphs 1.1.1, any chance you could double check if the issue is resolved? Thanks!

[lhsoicher]

Hi @james-d-mitchell

I installed gap 4.11.0 using the gap-4.11.0.exe installer, and got the following when I tried to load the Digraphs package:

┌───────┐ GAP 4.11.0 of 29-Feb-2020 │ GAP │ https://www.gap-system.org └───────┘ Architecture: x86_64-pc-cygwin-default64-kv7 Configuration: gmp 6.1.2, GASMAN, readline Loading the library and packages ... Packages: AClib 1.3.2, Alnuth 3.1.2, AtlasRep 2.1.0, AutoDoc 2019.09.04, AutPGrp 1.10.2, Browse 1.8.8, CaratInterface 2.3.3, CRISP 1.4.5, Cryst 4.1.23, CrystCat 1.1.9, CTblLib 1.2.2, FactInt 1.6.3, FGA 1.4.0, Forms 1.2.5, GAPDoc 1.6.3, genss 1.6.6, IO 4.7.0, IRREDSOL 1.4, LAGUNA 3.9.3, orb 4.8.3, Polenta 1.3.9, Polycyclic 2.15.1, PrimGrp 3.4.0, RadiRoot 2.8, recog 1.3.2, ResClasses 4.7.2, SmallGrp 1.4.1, Sophus 1.24, SpinSym 1.5.2, TomLib 1.2.9, TransGrp 2.0.5, utils 0.69 Try '??help' for help. See also '?copyright', '?cite' and '?authors' gap> LoadPackage("digraphs"); ───────────────────────────────────────────────────────────────────────────────────────────────────────────────────── Loading GRAPE 4.8.3 (GRaph Algorithms using PErmutation groups) by Leonard H. Soicher (http://www.maths.qmul.ac.uk/~lsoicher/). Homepage: https://gap-packages.github.io/grape Report issues at https://github.com/gap-packages/grape/issues ───────────────────────────────────────────────────────────────────────────────────────────────────────────────────── #W dlopen() error: Permission denied Error, module '/proc/cygdrive/C/gap-4.11.0/pkg/digraphs-1.1.1/bin/x86_64-pc-cygwin-default64-kv7/digraphs.so' not found in LOAD_DYN( arg[1], false ) at /proc/cygdrive/C/gap-4.11.0/lib/files.gd:587 called from <function "LoadDynamicModule">( ) called from read-eval loop at /proc/cygdrive/C/gap-4.11.0/pkg/digraphs-1.1.1/init.g:24 Error, was not in any namespace at /proc/cygdrive/C/gap-4.11.0/lib/variable.g:292 called from LEAVE_NAMESPACE( ); at /proc/cygdrive/C/gap-4.11.0/lib/package.gi:1303 called from ReadPackage( pkgname, "init.g" ); at /proc/cygdrive/C/gap-4.11.0/lib/package.gi:1670 called from <function "LoadPackage">( ) called from read-eval loop at stdin:1 you can 'quit;' to quit to outer loop, or you can 'return;' to continue brk>

---

From: James Mitchell [email protected] Sent: 09 March 2020 16:25 To: gap-packages/Digraphs Cc: Leonard Soicher; Mention Subject: Re: [gap-packages/Digraphs] Digraphs crashes on my Windows 10 laptop when computing ChromaticNumber (#295)

@lhsoicherhttps://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Flhsoicher&data=02%7C01%7C%7Cd70fe9a303da4981e7c808d7c4467ffe%7C569df091b01340e386eebd9cb9e25814%7C0%7C0%7C637193679384839494&sdata=1U%2BmIyBYJnsFWwvJMMo3OEYbeqmftv6Dm3qeeY2iq64%3D&reserved=0 GAP 4.11 is released with Digraphs 1.1.1, any chance you could double check if the issue is resolved? Thanks!

— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHubhttps://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fgap-packages%2FDigraphs%2Fissues%2F295%3Femail_source%3Dnotifications%26email_token%3DABXNAOAJB22LZ3DNVLLE3BDRGUJ77A5CNFSM4K4DA5S2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEOH6IQI%23issuecomment-596632641&data=02%7C01%7C%7Cd70fe9a303da4981e7c808d7c4467ffe%7C569df091b01340e386eebd9cb9e25814%7C0%7C0%7C637193679384849490&sdata=fyYFIDSCHZzZTQE%2B78Ygk5nPaiI6h0N6RXJIJFodN10%3D&reserved=0, or unsubscribehttps://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fnotifications%2Funsubscribe-auth%2FABXNAOGD4S4FUPFLK3NKGPDRGUJ77ANCNFSM4K4DA5SQ&data=02%7C01%7C%7Cd70fe9a303da4981e7c808d7c4467ffe%7C569df091b01340e386eebd9cb9e25814%7C0%7C0%7C637193679384849490&sdata=CvvYxUn%2FCY8HyfCVDji0JgBX6lfwjWZxKkqMK3uYSL0%3D&reserved=0.

[olexandr-konovalov]

@lhsoicher that's what I have, under Windows 10. How did you start GAP, which version of Windows do you have?

[lhsoicher]

I'm running Microsoft Windows 10 Home [Version 10.0.18362 Build 18362], and I run GAP 4.11.0 via its desktop icon.

[olexandr-konovalov]

@lhsoicher can you try to start it using C:\gap-4-11.0\bin\gap.batfile?

[lhsoicher]

I still have a problem loading the digraphs package when I run GAP by typing

C:\gap-4.11.0\bin\gap.bat

at the command prompt.

[olexandr-konovalov]

I usually go there using File Explorer and double-click on gap.bat. Tried via the command prompt - still can not reproduce. I don't know what to do next, without access to the actual machine. Two ideas:

• are you sure that you are not using any packages from your _gap directory? Try to start GAP by typing C:\gap-4.11.0\bin\gap.bat -r in the command prompt, to ignore it.

• try to install GAP from -win.zip archive from https://www.gap-system.org/Releases/index.html instead.

[james-d-mitchell]

@lhsoicher is this still a problem or did you get it to work?

[lhsoicher]

I have not gotten it to work, but on the other hand, I no longer use GAP under Windows.

[james-d-mitchell]

That's one solution :) I'll leave this open until we can confirm that the issue is resolved.