http://llvm.org/bugs/show_bug.cgi?id=19480
Bug ID: 19480
Summary: Miscompile when linking variable templates
instantiated from similarly named local types
Product: clang
Version: 3.4
Hardware: Other
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: C++1y
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
The functions foo() in the program below can only reside in their native
translation unit.
The local classes Foo in each foo() are distinct entities.
Clang seems to treat the x<Foo> specializations as one entity.
### TRANSLATION UNIT A:
> cat badvartmpllinkA.cc
template <typename T> int x = 42;
static int &foo() {
struct Foo { };
return x<Foo>;
}
int &bar() { return foo(); }
Return: 0x00:0
### TRANSLATION UNIT B:
> cat badvartmpllinkB.cc
template <typename T> int x = 42;
static int &foo() {
struct Foo { };
return x<Foo>;
}
int &bar();
int main() { &bar() == &foo() ? throw 0 : (void)0; }
Return: 0x00:0
### COMPILER INVOCATION:
> clang++ -std=c++1y -pedantic-errors badvartmpllinkA.cc badvartmpllinkB.cc -o
> badvartmpllink
Return: 0x00:0
### OUTPUT FROM RESULTING BINARY:
> ./badvartmpllink
terminate called after throwing an instance of 'int'
Aborted (core dumped)
Return: 0x86:134
### VERSION INFORMATION:
> clang++ -v
clang version 3.4 (tags/RELEASE_34/final)
Target: powerpc64-unknown-linux-gnu
Thread model: posix
Found candidate GCC installation: /usr/lib/gcc/ppc64-redhat-linux/4.4.4
Found candidate GCC installation: /usr/lib/gcc/ppc64-redhat-linux/4.4.6
Selected GCC installation: /usr/lib/gcc/ppc64-redhat-linux/4.4.6
Return: 0x00:0
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