Akim Demaille 807bf60cfc c++: fix double free when a symbol_type was moved ...

Currently the following piece of code crashes (with parse.assert),
because we don't record that s was moved-from, and we invoke its dtor.

    {
      auto s = parser::make_INT (42);
      auto s2 = std::move (s);
    }

Reported by Wolfgang Thaller.
http://lists.gnu.org/archive/html/bug-bison/2018-12/msg00077.html

* data/c++.m4 (by_type): Provide a move-ctor.
(basic_symbol): Be sure not to read a moved-from value.
* tests/c++.at (C++ Variant-based Symbols Unit Tests): Check this case.

2018-12-24 18:58:56 +01:00

19 KiB

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