[Webkit-unassigned] [Bug 187737] New: TestWTF.WTF_Expected.Unexpected is not MSVC-safe

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=187737

            Bug ID: 187737
           Summary: TestWTF.WTF_Expected.Unexpected is not MSVC-safe
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ross.kirsling at sony.com
                CC: lforschler at apple.com

The following test is compiler-dependent:

> constexpr const char* oops = "oops";
> ...
> constexpr auto s0 = makeUnexpected(oops);
> constexpr auto s1(s0);
> EXPECT_EQ(s0, s1);

It fails on Windows with the following error...

> ..\..\Tools\TestWebKitAPI\Tests\WTF\Expected.cpp:96
> Value of: s1
>   Actual: oops
> Expected: s0
> Which is: oops

...due to the fact that MSVC evidently keeps a separate string for each const char* variable when they're declared constexpr:
https://godbolt.org/g/HGC8nw

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