[llvm-bugs] [Bug 39964] New: Unclear error message

via llvm-bugs llvm-bugs at lists.llvm.org
Tue Dec 11 13:41:46 PST 2018


            Bug ID: 39964
           Summary: Unclear error message
           Product: clang
           Version: 7.0
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: jvapen at gmail.com
                CC: htmldeveloper at gmail.com, llvm-bugs at lists.llvm.org,
                    neeilans at live.com, richard-llvm at metafoo.co.uk

struct A
    A() = default;
    A(A&&) {}

struct B : A
    B() = default;
    B(B&&) noexcept = default;

    A a;

Error message:
exception specification of explicitly defaulted move constructor does not match
the calculated one

see https://gcc.godbolt.org/z/lvQ6a_

The error message itself doesn't help me solving the problem.
I now know that B can't be nothrow-move-constructable.
However, I don't get told why this is the case.
For this specific case, I rather add 'noexcept' to class A, than removing it
from B.
Knowing where the 'calculated one' gets the different result from, allows me to
do so.

You are receiving this mail because:
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-bugs/attachments/20181211/2fb946dc/attachment.html>

More information about the llvm-bugs mailing list