Bug in template parsing?

[Marcel Keller]

Hi,

Trying to compile the attached code with GCC 5.3.0 gives the error:

templ_bug.cpp: In function ‘void g()’:
templ_bug.cpp:15:12: error: expected primary-expression before ‘)’ token
    T().f<t>();
             ^
templ_bug.cpp: In instantiation of ‘void g() [with T = A; int t = 0]’:
templ_bug.cpp:19:10:   required from here
templ_bug.cpp:15:8: error: invalid operands of types ‘<unresolved 
overloaded function type>’ and ‘int’ to binary ‘operator<’
    T().f<t>();
         ^

However, if I uncomment the commented line, it works fine. I cannot 
understand why this should make a difference. Is there a mistake in the 
code or a bug in GCC?

Best regards,
Marcel
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