[Rpm-maint] [rpm-software-management/rpm] Fix a segfault on a non-stringable argument to macro call from Lua (PR #2438)

[Panu Matilainen]

When natively calling a parametric macro from Lua, with the arguments inside a table, we can't assume lua_tostring() always succeeds as it can fail eg on a table. Report the error instead of crashing in argvAdd(), and add a test as well.
You can view, comment on, or merge this pull request online at:

  https://github.com/rpm-software-management/rpm/pull/2438

-- Commit Summary --

  * Fix a segfault on a non-stringable argument to macro call from Lua

-- File Changes --

    M rpmio/rpmlua.c (9)
    M tests/rpmmacro.at (9)

-- Patch Links --

https://github.com/rpm-software-management/rpm/pull/2438.patch
https://github.com/rpm-software-management/rpm/pull/2438.diff

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