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Language

C++

Compiler

clang HEAD 12.0.0 (https://github.com/llvm/llvm-project.git 344a3d0bc0fb0868b519c3342b4982d6121eece3)

Options
Warnings
Boost 1.73.0
C++2a
no pedantic
Raw compiler options
-Wunreachable-code

$ clang++ prog.cc -Wall -Wextra -I/opt/wandbox/boost-1.73.0/clang-head/include -std=c++2a -Wunreachable-code
prog.cc:5:13: warning: unused variable 'i' [-Wunused-variable]
   for (int i = 0 ; ; ) ;
            ^
prog.cc:6:4: warning: code will never be executed [-Wunreachable-code]
   i++;   // C4288 using for-loop declaration of i
   ^
2 warnings generated.
Signal:
Killed