`<ranges>`: Usage of `ranges::iterator_t` causes ICE

[JMazurkiewicz]

Basic Info

• I have read the rules for the Standard Library Modules Bug Bash.
• I have pulled and rebuilt the bug-bash branch in the last 24 hours.
• My current commit, as printed by git rev-parse HEAD, is: 83b0eb5585b6726203fb867ecdd9bda298fd38c1
• This bug is: ICE-on-valid

Command-Line Test Case

My test case that works with classic includes but fails with named modules:

PS D:\stl-playground\named_modules> type .\main.cpp

#ifdef USE_CLASSIC_INCLUDES
#include <concepts>
#include <ranges>
#else
import std;
#endif

int main() {
    using U = std::ranges::iterator_t<int(&)[3]>;
    static_assert(std::same_as<U, int*>);
}

PS D:\stl-playground\named_modules> $STL = "D:\stl"                                      
>> $CXXFLAGS = "/EHsc", "/nologo", "/W4", "/std:c++latest", "/MTd", "/Od", "/Femain.exe",
>>             "/reference", "$STL\std.ifc", "$STL\std.obj",
>>             "/reference", "$STL\std.compat.ifc", "$STL\std.compat.obj"
PS D:\stl-playground\named_modules> cl $CXXFLAGS .\main.cpp /DUSE_CLASSIC_INCLUDES
main.cpp
PS D:\stl-playground\named_modules> .\main.exe                                           
PS D:\stl-playground\named_modules> cl $CXXFLAGS .\main.cpp
main.cpp
.\main.cpp(9): fatal error C1001: Internal compiler error.
(compiler file 'msc1.cpp', line 1576)
 To work around this problem, try simplifying or changing the program near the locations listed above.
If possible please provide a repro here: https://developercommunity.visualstudio.com
Please choose the Technical Support command on the Visual C++
 Help menu, or open the Technical Support help file for more information
D:\stl\out\x64\out\inc\xutility(1912): note: see reference to alias template instantiation 'std::ranges::iterator_t<_Rng>' being compiled
INTERNAL COMPILER ERROR in 'C:\Program Files\Microsoft Visual Studio\2022\Preview\VC\Tools\MSVC\14.33.31629\bin\HostX64\x64\cl.exe'      
    Please choose the Technical Support command on the Visual C++
    Help menu, or open the Technical Support help file for more information

Additional Context

• This error propagates to other types:

#ifdef USE_CLASSIC_INCLUDES
#include <iterator>
#include <set>
#else
import std;
#endif

int main() {
    std::set<int> x;
    auto z = std::inserter(x, x.end());
}

PS D:\stl-playground\named_modules> cl $CXXFLAGS .\main.cpp
main.cpp
.\main.cpp(10): fatal error C1001: Internal compiler error.
(compiler file 'msc1.cpp', line 1576)
 To work around this problem, try simplifying or changing the program near the locations listed above.
If possible please provide a repro here: https://developercommunity.visualstudio.com
Please choose the Technical Support command on the Visual C++
 Help menu, or open the Technical Support help file for more information
D:\stl\out\x64\out\inc\xutility(1912): note: see reference to alias template instantiation 'std::ranges::iterator_t<_Rng>' being compiled
INTERNAL COMPILER ERROR in 'C:\Program Files\Microsoft Visual Studio\2022\Preview\VC\Tools\MSVC\14.33.31629\bin\HostX64\x64\cl.exe'      
    Please choose the Technical Support command on the Visual C++
    Help menu, or open the Technical Support help file for more information

[StephanTLavavej]

Thanks! Reported as internal VSO-1584629 "Standard Library Modules: Usage of ranges::iterator_t causes ICE".

[StephanTLavavej]

Fixed by internal MSVC-PR-441711 for VS 2022 17.6 Preview 1. Thanks again for the report!