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Subject: [Bug gdb/28093] set language unknown -> print "foo" -> GDB crash
Date: Mon, 19 Jul 2021 17:08:10 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D28093

--- Comment #4 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gn=
u.org> ---
The gdb-11-branch branch has been updated by Tom Tromey
<tromey@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=3Dbinutils-gdb.git;h=3De22715ce3009=
57aabdf908a76fb1bf8bc17bba21

commit e22715ce300957aabdf908a76fb1bf8bc17bba21
Author: Tom Tromey <tromey@adacore.com>
Date:   Thu Jul 15 10:13:18 2021 -0600

    Avoid expression parsing crash with unknown language

    PR gdb/28093 points out that gdb crashes when language is set to
    "unknown" and expression parsing is attempted.  At first I thought
    this was a regression due to the expression rewrite, but it turns out
    that older versions crash as well.

    This patch avoids the crash by changing the default expression parser
    to throw an exception.  I think this is preferable -- the current
    behavior of silently doing nothing does not really make sense.

    Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=3D28093
    (cherry picked from commit dcd482c1b756d9da2130552a6eb58b852d6efb97)

    gdb/ChangeLog
    2021-07-19  Tom Tromey  <tromey@adacore.com>

            PR gdb/28093
            * language.c (auto_or_unknown_language::parser): Call error.

    gdb/testsuite/ChangeLog
    2021-07-19  Tom Tromey  <tromey@adacore.com>

            PR gdb/28093
            * gdb.base/langs.exp: Add tests.

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