Regression 9.0.0-RC1 Assertion failed: (!E || isa<FunctionParmPackExpr>(E)) && "missing non-odr-use marking for unevaluated decl ref", #42206
Description
| Bugzilla Link | 42861 |
| Version | 9.0 |
| OS | Windows NT |
| Blocks | #41819 |
| CC | @zmodem,@zygoloid |
Extended Description
Failure on windows: (compiles with 7.0.0)
// clang-cl.exe /nologo /c -w /EHsc /std:c++17 t.cpp
#include <typeinfo> struct A { virtual ~A() = default; }; struct __declspec(dllexport) B : A {}; template <typename T> struct C { void f(const T &); }; struct __declspec(dllexport) D : C<B> {}; template <class T> void C<T>::f(const T &t) { [&t](auto) { typeid(t); }(0); }Error
Assertion failed: (!E || isa<FunctionParmPackExpr>(E)) && "missing non-odr-use marking for unevaluated decl ref", file C:\src\llvm_package_900-rc1\llvm\tools\clang\lib\Sema\SemaExpr.cpp, line 16401 Stack dump: 0. Program arguments: clang-cl.exe -cc1 -triple x86_64-pc-windows-msvc19.16.27027 -emit-obj -mrelax-all -mincremental-linker-compatible -disable-free -main-file-name t.cpp -mrelocation-model pic -pic-level 2 -mthread-model posix -relaxed-aliasing -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -target-cpu x86-64 -mllvm -x86-asm-syntax=intel -D_MT -flto-visibility-public-std --dependent-lib=libcmt --dependent-lib=oldnames -stack-protector 2 -fcxx-exceptions -fexceptions -fexternc-nounwind -fms-volatile -fdiagnostics-format msvc -dwarf-column-info -coverage-notes-file t.gcno -resource-dir LLVM_9_0_0-RC1\lib\clang\9.0.0 -internal-isystem LLVM_9_0_0-RC1\lib\clang\9.0.0\include -internal-isystem C:\DevStudio\Vs2017\VC\Tools\MSVC\14.16.27023\ATLMFC\include -internal-isystem C:\DevStudio\Vs2017\VC\Tools\MSVC\14.16.27023\include -internal-isystem C:\Program Files (x86)\Windows Kits\NETFXSDK\4.6.1\include\um -internal-isystem C:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\ucrt -internal-isystem C:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\shared -internal-isystem C:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\um -internal-isystem C:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\winrt -internal-isystem C:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\cppwinrt -w -fdeprecated-macro -fdebug-compilation-dir F:\Other\tests\assert_odr -ferror-limit 19 -fmessage-length 172 -fno-use-cxa-atexit -fms-extensions -fms-compatibility -fms-compatibility-version=19.16.27027 -std=c++17 -fdelayed-template-parsing -fobjc-runtime=gcc -fdiagnostics-show-option -fcolor-diagnostics -faddrsig -o t.obj -x c++ t.cpp 1. <eof> parser at end of file 2. t.cpp:9:39: instantiating function definition 'C<B>::f' 3. t.cpp:13:3: instantiating function definition 'C<B>::f(const B &)::(anonymous class)::operator()<int>' #​0 0x00007ff68299a126 (clang-cl.exe+0x1dda126) #​1 0x00007ffa2790d167 (C:\Windows\System32\ucrtbase.dll+0x6d167) #​2 0x00007ffa2790dff1 (C:\Windows\System32\ucrtbase.dll+0x6dff1) #​3 0x00007ffa2790fd5a (C:\Windows\System32\ucrtbase.dll+0x6fd5a) #​4 0x00007ffa2790fc51 (C:\Windows\System32\ucrtbase.dll+0x6fc51) #​5 0x00007ffa2790ffaf (C:\Windows\System32\ucrtbase.dll+0x6ffaf) #​6 0x00007ff6843dba2d (clang-cl.exe+0x381ba2d) #​7 0x00007ff6843835b4 (clang-cl.exe+0x37c35b4)