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Overview of changes in the GAP 4.10.1 release
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Alexander Konovalov committed Feb 23, 2019
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Expand Up @@ -601,7 +601,7 @@ with the graphical objects by clicking, selecting, dragging and zooming.
</Item>
<Item>
The <Package>JupyterVis</Package> package by Nathan Carter, which is intended for use
in Jupyter Notebooks running GAP kernels and adds visualization tools for use
in Jupyter Notebooks running &GAP; kernels and adds visualization tools for use
in such notebooks, such as charts and graphs.
</Item>
</List>
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</Section>

<Section Label="GAP4.10.1">
<Heading>&GAP; 4.10.1 (February 2019)</Heading>

<Subsection Label="Changes in the core GAP system introduced in GAP 4.10.1">
<Heading>Changes in the core &GAP; system introduced in &GAP; 4.10.1</Heading>

Fixes in the experimental way to allow 3rd party code to link &GAP; as a library:
<List>
<Item>
Do not start a session when loading workspace if <C>--nointeract</C> command line option is used
(<URL><LinkText>&Hash;2840</LinkText><Link>https://github.com/gap-system/gap/pull/2840</Link></URL>).
</Item>
<Item>
Add prototype for <C>GAP_Enter</C> and <C>GAP_Leave</C> macros
(<URL><LinkText>&Hash;3096</LinkText><Link>https://github.com/gap-system/gap/pull/3096</Link></URL>).
</Item>
<Item>
Prevent infinite recursions in <C>echoandcheck</C> and <C>SyWriteandcheck</C>
(<URL><LinkText>&Hash;3102</LinkText><Link>https://github.com/gap-system/gap/pull/3102</Link></URL>).
</Item>
<Item>
Remove <C>environ</C> arguments and <C>sysenviron</C>
(<URL><LinkText>&Hash;3111</LinkText><Link>https://github.com/gap-system/gap/pull/3111</Link></URL>).
</Item>
</List>

Fixes in the experimental support for using the Julia garbage collector:
<List>
<Item>
Fix task scanning for the Julia GC
(<URL><LinkText>&Hash;2969</LinkText><Link>https://github.com/gap-system/gap/pull/2969</Link></URL>).
</Item>
<Item>
Fix stack marking for the Julia GC
(<URL><LinkText>&Hash;3199</LinkText><Link>https://github.com/gap-system/gap/pull/3199</Link></URL>).
</Item>
<Item>
Specify the Julia binary instead of the Julia prefix
(<URL><LinkText>&Hash;3243</LinkText><Link>https://github.com/gap-system/gap/pull/3243</Link></URL>).
</Item>
<Item>
Export Julia <C>CFLAGS</C>, <C>LDFLAGS</C>, and <C>LIBS</C> to <C>sysinfo.gap</C>
(<URL><LinkText>&Hash;3248</LinkText><Link>https://github.com/gap-system/gap/pull/3248</Link></URL>).
</Item>
</List>

Improved and extended functionality:
<List>
<Item>
Always generate <C>sysinfo.gap</C> (previously, it was only generated if
the "compatibility mode" of the build system was enabled)
(<URL><LinkText>&Hash;3042</LinkText><Link>https://github.com/gap-system/gap/pull/3042</Link></URL>).
</Item>
<Item>
Add support for writing to <C>ERROR_OUTPUT</C> from kernel code
(<URL><LinkText>&Hash;3043</LinkText><Link>https://github.com/gap-system/gap/pull/3043</Link></URL>).
</Item>
<Item>
Add <C>make check</C>
(<URL><LinkText>&Hash;3285</LinkText><Link>https://github.com/gap-system/gap/pull/3285</Link></URL>).
</Item>
</List>

Changed documentation:
<List>
<Item>
Fix documentation of <Ref Oper="NumberFFVector" BookName="ref"/> and add an example
(<URL><LinkText>&Hash;3079</LinkText><Link>https://github.com/gap-system/gap/pull/3079</Link></URL>).
</Item>
</List>

Fixed bugs that could lead to crashes:
<List>
<Item>
Fix readline crash when using autocomplete with <C>colored-completion-prefix</C> turned on in Bash
(<URL><LinkText>&Hash;2991</LinkText><Link>https://github.com/gap-system/gap/pull/2991</Link></URL>).
</Item>
<Item>
Fix overlapping <C>memcpy</C> in <C>APPEND_LIST</C>
(<URL><LinkText>&Hash;3216</LinkText><Link>https://github.com/gap-system/gap/pull/3216</Link></URL>).
</Item>
</List>

Fixed bugs that could lead to incorrect results:
<List>
<Item>
Fix bugs in the code for partial permutations
(<URL><LinkText>&Hash;3220</LinkText><Link>https://github.com/gap-system/gap/pull/3220</Link></URL>).
</Item>
<Item>
Fix a bug in <C>Gcd</C> for polynomials not returning standard associates, introduced in &GAP; 4.10.0
(<URL><LinkText>&Hash;3227</LinkText><Link>https://github.com/gap-system/gap/pull/3227</Link></URL>).
</Item>
</List>

Fixed bugs that could lead to break loops:
<List>
<Item>
Change <Ref Oper="GroupWithGenerators" BookName="ref"/> to accept collections again (to avoid
regressions in code that relied on this undocumented behavior)
(<URL><LinkText>&Hash;3095</LinkText><Link>https://github.com/gap-system/gap/pull/3095</Link></URL>).
</Item>
<Item>
Fix <Ref Oper="ShallowCopy" BookName="ref"/> for for a Knuth-Bendix rewriting system
(<URL><LinkText>&Hash;3128</LinkText><Link>https://github.com/gap-system/gap/pull/3128</Link></URL>).
[Reported by Ignat Soroko]
</Item>
<Item>
Fix <Ref Prop="IsMonomialMatrix" BookName="ref"/> to work with compressed matrices
(<URL><LinkText>&Hash;3149</LinkText><Link>https://github.com/gap-system/gap/pull/3149</Link></URL>).
[Reported by Dominik Bernhardt]
</Item>
</List>

Removed or obsolete functionality:
<List>
<Item>
Disable <C>make install</C> (previously it displayed a warning which often got ignored)
(<URL><LinkText>&Hash;3005</LinkText><Link>https://github.com/gap-system/gap/pull/3005</Link></URL>).
</Item>
</List>

Other fixed bugs:
<List>
<Item>
Fix some errors which stopped triggering a break loop
(<URL><LinkText>&Hash;3013</LinkText><Link>https://github.com/gap-system/gap/pull/3013</Link></URL>).
</Item>
<Item>
Fix compiler error with GCC 4.4.7
(<URL><LinkText>&Hash;3026</LinkText><Link>https://github.com/gap-system/gap/pull/3026</Link></URL>).
</Item>
<Item>
Fix string copying logic
(<URL><LinkText>&Hash;3071</LinkText><Link>https://github.com/gap-system/gap/pull/3071</Link></URL>).
</Item>
</List>

</Subsection>

<Subsection Label="New and updated packages since GAP 4.10.0">
<Heading>New and updated packages since &GAP; 4.10.0</Heading>

&GAP; 4.10.1 distribution contains 145 packages, including updated
versions of 35 packages from &GAP; 4.10.0 distribution, and also
the following five new packages:

<List>
<Item>
<Package>MajoranaAlgebras</Package>
by Markus Pfeiffer and Madeleine Whybrow, which constructs Majorana
representations of finite groups.
</Item>
<Item>
<Package>PackageManager</Package>
by Michael Torpey, providing a collection of functions for
installing and removing &GAP; packages, with the eventual aim of
becoming a full pip-style package manager for the &GAP; system.
</Item>
<Item>
<Package>Thelma</Package>
by Victor Bovdi and Vasyl Laver, implementing algorithms to deal
with threshold elements.
</Item>
<Item>
<Package>walrus</Package>
by Markus Pfeiffer, providing methods for proving hyperbolicity
of finitely presented groups in polynomial time.
</Item>
<Item>
<Package>YangBaxter</Package>
by Leandro Vendramin and Alexander Konovalov, which provides
functionality to construct classical and skew braces, and also
includes a database of classical and skew braces of small orders.
</Item>
</List>

</Subsection>

</Section>

</Chapter>

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