PackageManager appears to interfere with LoadPackage called in a loop

[dimpase]

In a custom installation of GAP 4.12.1, I have a problem calling LoadAllPackages() (taken from gap-packages/crypting#21 (comment)):

A bit of debugging reveals the following:

gap> r:=RecNames( GAPInfo.PackagesInfo );
[ "autpgrp", "format", "repndecomp", "permut", "singular", "aclib", "alnuth", "atlasrep", "io", "autodoc", "cohomolo", "corelg", 
  "crime", "crisp", "crypting", "cryst", "crystcat", "ctbllib", "datastructures", "design", "digraphs", "factint", "fga", 
  "gapdoc", "gbnp", "genss", "grape", "guava", "hap", "hapcryst", "hecke", "images", "irredsol", "laguna", "liealgdb", "liepring", 
  "liering", "loops", "mapclass", "nq", "orb", "packagemanager", "polenta", "polycyclic", "polymaking", "primgrp", "qpa", 
  "quagroup", "radiroot", "repsn", "resclasses", "semigroups", "sla", "smallgrp", "sonata", "sophus", "tomlib", "toric", 
  "transgrp", "utils" ]
gap> SetUserPreference("InfoPackageLoadingLevel", 4);
gap> for p in r do if not IsPackageLoaded(p) then LoadPackage(p); fi; od;
...
Loading  MapClass 1.4.6 (A Package For Mapping Class Orbit Computation)
by Adam James,
   Kay Magaard,
   Sergey Shpectorov (https://web.mat.bham.ac.uk/S.Shpectorov/index.html), and
   Helmut Volklein.
maintained by:
   Sergey Shpectorov (https://web.mat.bham.ac.uk/S.Shpectorov/index.html).
Homepage: https://gap-packages.github.io/MapClass
Report issues at https://github.com/gap-packages/MapClass/issues
──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
Error, no method found! For debugging hints type ?Recovery from NoMethodFound
Error, no 1st choice method found for `Filename' on 2 arguments
The 1st argument is 'fail' which might point to an earlier problem
 at /home/scratch/scratch2/dimpase/sage/sagetrac-mirror/local/share/gap/lib/methsel2.g:249 called from
<function "HANDLE_METHOD_NOT_FOUND">( <arguments> )
 called from read-eval loop at /home/scratch/scratch2/dimpase/sage/sagetrac-mirror/local/lib/gap/pkg/packagemanager/gap/PackageManager.gd:295
type 'quit;' to quit to outer loop
brk> 

What is PackageManager doing here?

[antonio-rojas]

This is the same as #105

[dimpase]

A very juicy bug indeed :-)