Jason Rhinelander 326deef2ae Fix segfault when reloading interpreter with external modules (#1092) ... * Fix segfault when reloading interpreter with external modules When embedding the interpreter and loading external modules in that embedded interpreter, the external module correctly shares its internals_ptr with the one in the embedded interpreter. When the interpreter is shut down, however, only the `internals_ptr` local to the embedded code is actually reset to nullptr: the external module remains set. The result is that loading an external pybind11 module, letting the interpreter go through a finalize/initialize, then attempting to use something in the external module fails because this external module is still trying to use the old (destroyed) internals. This causes undefined behaviour (typically a segfault). This commit fixes it by adding a level of indirection in the internals path, converting the local internals variable to `internals **` instead of `internals *`. With this change, we can detect a stale internals pointer and reload the internals pointer (either from a capsule or by creating a new internals instance). (No issue number: this was reported on gitter by @henryiii and @aoloe).		2018-01-11 19:46:10 -04:00
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pybind11	Fix segfault when reloading interpreter with external modules (#1092)	2018-01-11 19:46:10 -04:00