[Bug python/18730] New: verify correct __init__.py is being loaded

[Bug python/18730] New: verify correct __init__.py is being loaded

[dje at google dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=18730

            Bug ID: 18730
           Summary: verify correct __init__.py is being loaded
           Product: gdb
           Version: unknown
            Status: NEW
          Severity: normal
          Priority: P2
         Component: python
          Assignee: unassigned at sourceware dot org
          Reporter: dje at google dot com
  Target Milestone: ---

If one happens to start a gdb from a build tree, or a staging area (e.g., make
install DESTDIR=/build/gdb/staging), and there's some installation error, gdb
may end up using /usr/share/gdb/python/gdb/__init__py (or whatever the
configured data dir is). There's no guarantee that the currently installed
__init__.py is compatible with the gdb being run.

Either gdb needs to not fallback to using the configured data-dir if it can't
find data-dir relative to its current location
(e.g., /build/gdb/staging/usr/bin/gdb -> /build/gdb/staging/usr/share/gdb, or
whatever),
or we should at least verify that the data-dir we find is for the same version
of gdb.

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