[Bug other/62002] New: -fcilkplus switch breaks format attribute.

[Bug other/62002] New: -fcilkplus switch breaks format attribute.

[astellar at ro dot ru]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62002

            Bug ID: 62002
           Summary: -fcilkplus switch breaks format attribute.
           Product: gcc
           Version: 4.9.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: other
          Assignee: unassigned at gcc dot gnu.org
          Reporter: astellar at ro dot ru

~/src/test# cat test.cpp 
struct foo
{
    void bar(char const *, ...) __attribute__((__format__(__printf__, 2, 3)));
};

`g++-4.9 -c test.cpp` compiles without errors. However, `g++-4.9 -fcilkplus -c
test.cpp` produces this message:
test.cpp:3:77: error: format string argument is not a string type
     void bar(char const *, ...) __attribute__((__format__(__printf__, 2, 3)));

I've compiled GCC from git mirror's 4.9 branch.

[Bug other/62002] -fcilkplus switch breaks format attribute.

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62002

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2014-08-03
                 CC|                            |mpolacek at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed.

[Bug other/62002] -fcilkplus switch breaks format attribute.

[izamyatin at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62002

Igor Zamyatin <izamyatin at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |izamyatin at gmail dot com

--- Comment #2 from Igor Zamyatin <izamyatin at gmail dot com> ---
Am I correct that adding -fcilkplus just fixes the bug somehow? 

I see that regular trunk g++ gives error for

struct foo
{
  void bar(void *my_object, char const *, ...)
__attribute__((__format__(__printf__, 2, 3)));
};

which is supposed to be correct according to the
docs(https://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html#Function-Attributes)

[Bug other/62002] -fcilkplus switch breaks format attribute.

[astellar at ro dot ru]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62002

--- Comment #3 from Viacheslav Chernyshev <astellar at ro dot ru> ---
No, fcilkplus switch triggers compilation error when code is perfectly valid.
Your example is wrong, as in C++ this pointer is an implicit first argument of
member function.

[Bug other/62002] -fcilkplus switch breaks format attribute.

[izamyatin at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62002

--- Comment #4 from Igor Zamyatin <izamyatin at gmail dot com> ---
Right, it is mentioned explicitly in the docs. Will take a look

[Bug other/62002] -fcilkplus switch breaks format attribute.

[astellar at ro dot ru]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62002

Viacheslav Chernyshev <astellar at ro dot ru> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|4.9.2                       |5.1.0

--- Comment #5 from Viacheslav Chernyshev <astellar at ro dot ru> ---
I would like to resurrect this bugreport, as the same problem still happens
with GCC 5.1.