Ivan Krasin d98f5d78cb Insert a type check before reading vtable. ...

Summary:
this is to prevent a situation when a pointer is invalid or null,
but we get to reading from vtable before we can check that
(possibly causing a segfault without a good diagnostics).

Reviewers: pcc

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D26559

llvm-svn: 287181

2016-11-17 00:39:48 +00:00

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