These are the customer-reported issues addressed in 15.8.4:
- Constexpr function with explicit (void) parameter crashes MSVC 15.8.0 release.
- TypeScriptLspCodeActionProvider encountered an error and has been disabled.
- The 'Shared Web Components' package did not load correctly.
- Editing CSS with Browser Link enabled can crash Visual Studio.
- Service Fabric Deployment fails in 15.8.0.
- Incorrect error for constexpr pointer to members with VS2017 15.8.
- Constexpr doesn't support __declspec(dllimport) in VS2017 15.8.
- C++ VS 2017 Update 8 difference in member function pointer between C++14 and C++17 modes leads to crashes.
- TestExplorer locking up UI in latest build.
- [WebKit] "Already defined symbol" for static template member definition (regression).
- VS 15.8.0 Internal compiler error.
- Internal compiler error in constexpr function.
- Test Explorer Window remains blank with Express.
- Visual Studio 2017 fails to open on FIPS-enabled machine..
- VS2017 15.8 Internal Compiler Error 'msc1.cpp', line 1518 when evaluating simple constexpr function.
- Fatal error C1001 after update to VS 15.8.0.
- Migrating to VS2017 15.8: Internal compiler error when using constexpr functions as template parameters.
- Internal compiler error when compiling a template function with a constexpr in VC++ 15.8.0.
- Code generated by VC 15.8.1 compiler lead to crash.
