[llvm-bugs] [Bug 20717] assertion failure assigning to immutable generic lambda init-capture

via llvm-bugs llvm-bugs at lists.llvm.org
Sun Jul 2 04:17:26 PDT 2017


NODA, Kai <nodakai at gmail.com> changed:

           What    |Removed                     |Added
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED
                 CC|                            |nodakai at gmail.com

--- Comment #1 from NODA, Kai <nodakai at gmail.com> ---
As of today, clang trunk at 306691 can correctly reject the test case with
-std=c++14 or 1z:

/tmp/m.cpp:2:39: error: cannot assign to a variable captured by copy in a
non-mutable lambda
  auto x = [i = 0](auto n) { return i += n; }(1);
                                    ~ ^
/tmp/m.cpp:2:46: note: in instantiation of function template specialization
'main()::(anonymous class)::operator()<int>' requested here
  auto x = [i = 0](auto n) { return i += n; }(1);
1 error generated.

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