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Editorial Team
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Asked: 2026-05-18T05:33:19+00:00

I get segmentation fault accessing an object which looks valid and fully accessible in

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I get segmentation fault accessing an object which looks valid and fully accessible in gdb. Isn’t segmentation is always about inaccessible memory?

EDIT: more details.

The crash happend under gdb so I could examine the object’s memory. It had the members set to proper values so there is no chance I was accessing read-only memory. The instruction where crashed happed is kind of Var = Obj.GetMember() where Var, GetMember and the corresponding member are short integers.
Misalignment? I suppose it would cause bus error, not segmentation. I’ll try to rebuild all. The problem is that this piece of code runs thousands times a second and the segmentation happens once in several days.

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1 Answer

  1. Editorial Team

    Try complete rebuild (make clean && make), this had helped me a couple of times when I encountered such weird errors.

    Late UPD:

    If this does fix the problem, it usually means that something is wrong with your makefile, usually screwed-up dependencies between .cpp and .h files, for example: a.cpp includes b.h, but b.h is not listed in a.cpp’s dependencies.

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