invalid vptr after gdb prints the return value of a virtual function member on a 64 bit system

[Böjthe Zoltán]

The virtual function getMyVal() of MyClass returns a MyVal object as value, and MyVal object size is small, and MyVal object has copy constructor.

When I use "p myClass->getMyVal()", the gdb calls the copy ctor of MyVal badly, and copy ctor overwrite the vptr of the myClass.

When I remove the copy ctor of MyVal, or I add some dummy members to MyVal, the gdb will work correctly.

Tested in Ubuntu 11.10, 64 bit. (On Ubuntu 11.10, 32 bit, work correctly)

See attached files.

 

Zoltan Bojthe.

 

a.cc
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build.sh
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gdb.in
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run.sh
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gdb.expected.out
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gdb.out
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