[LLVMbugs] [Bug 19035] New: Explicit instantiated variable template leads to miscompile

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=19035

            Bug ID: 19035
           Summary: Explicit instantiated variable template leads to
                    miscompile
           Product: clang
           Version: unspecified
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++1y
          Assignee: unassignedclangbugs at nondot.org
          Reporter: david.majnemer at gmail.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

consider:

template <typename = void>
int x{42};

template <>
int x<>;

int y = x<>;

this has the strange result of giving both x<void> and y the value zero.

AFAICT, this is caused by a lack of sufficient instantiation of the initializer
when we explicitly instantiate x.

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