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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/113208] [14 Regression] lto1: error: Alias and target's
 comdat groups differs since r14-5979-g99d114c15523e0
Date: Sun, 24 Mar 2024 19:59:52 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113208

--- Comment #13 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Sam James from comment #9)
> ```
> $ gcc -std=3Dc++20 -flto src_data_test_MappedRead.cpp.ii
> src_data_test_QualityValues.cpp.ii -O1
> lto1: error: Alias and target=E2=80=99s comdat groups differs
> _ZNSt6vectorIN6PacBio4Data12QualityValueESaIS2_EEC2ERKS4_/8 (__ct_base )
>   Type: function definition analyzed
> [...]
> ```

This testcase seems undefined behavior ...
The only difference between the 2 files is one has constexpr on the vector
constructor and the other does not ...=