Interactive shell errors when logical values are used.

[Vipul-Cariappa]

Example:

❯ lf
Interactive Fortran. Experimental prototype, not ready for end users.
LFortran version: 0.35.0-180-ga53354837
  * Use Ctrl-D to exit
  * Use Enter to submit
  * Use Alt-Enter or Ctrl-N to make a new line
    - Editing (Keys: Left, Right, Home, End, Backspace, Delete)
    - History (Keys: Up, Down)
>>> .true.                                                                                                                             1,7   ]
Internal Compiler Error: Unhandled exception
Traceback (most recent call last):
  Binary file "/home/vipul/Workspace/bin/lfortran/src/bin/lfortran", in _start()
  Binary file "/lib64/libc.so.6", in __libc_start_main_alias_2()
  Binary file "/lib64/libc.so.6", in __libc_start_call_main()
  Binary file "/home/vipul/Workspace/bin/lfortran/src/bin/lfortran", in main()
  Binary file "/home/vipul/Workspace/bin/lfortran/src/bin/lfortran", in main_app(int, char**)
  File "lfortran.cpp", line 0, in (anonymous namespace)::prompt(bool, LCompilers::CompilerOptions&) [clone .isra.0]
  Binary file "/home/vipul/Workspace/bin/lfortran/src/bin/lfortran", in LCompilers::FortranEvaluator::evaluate(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, bool, LCompilers::LocationManager&, LCompilers::PassManager&, LCompilers::diag::Diagnostics&)
  Binary file "/home/vipul/Workspace/bin/lfortran/src/bin/lfortran", in LCompilers::FortranEvaluator::get_llvm3(LCompilers::ASR::TranslationUnit_t&, LCompilers::PassManager&, LCompilers::diag::Diagnostics&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)
  Binary file "/home/vipul/Workspace/bin/lfortran/src/bin/lfortran", in LCompilers::asr_to_llvm(LCompilers::ASR::TranslationUnit_t&, LCompilers::diag::Diagnostics&, llvm::LLVMContext&, Allocator&, LCompilers::PassManager&, LCompilers::CompilerOptions&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)
LCompilersException: Return type not supported in interactive mode

[kmr-srbh]

@Vipul-Cariappa thanks for bringing this to notice. This issue occurs for other types like characters and arrays as well.

(base) saurabh-kumar@Awadh:~$ lfortran
Interactive Fortran. Experimental prototype, not ready for end users.
LFortran version: 0.1.0-5-g92d644b2b-dirty
  * Use Ctrl-D to exit
  * Use Enter to submit
  * Use Alt-Enter or Ctrl-N to make a new line
    - Editing (Keys: Left, Right, Home, End, Backspace, Delete)
    - History (Keys: Up, Down)
>>> "a"                                                                  1,4   ]
Internal Compiler Error: Unhandled exception
Traceback (most recent call last):
  Binary file "/home/saurabh-kumar/Projects/System/lfortran/src/bin/lfortran", in _start()
  File "./csu/../csu/libc-start.c", line 360, in __libc_start_main_impl()
  File "./csu/../sysdeps/x86/libc-start.c", line 58, in __libc_start_call_main()
  File "/home/saurabh-kumar/Projects/System/lfortran/src/bin/lfortran.cpp", line 2462, in main()
    return main_app(argc, argv);
  File "/home/saurabh-kumar/Projects/System/lfortran/src/bin/lfortran.cpp", line 2256, in main_app(int, char**)
    return prompt(arg_v, compiler_options);
  File "/home/saurabh-kumar/Projects/System/lfortran/src/bin/lfortran.cpp", line 298, in prompt()
    res = e.evaluate(input, verbose, lm, lpm, diagnostics);
  File "/home/saurabh-kumar/Projects/System/lfortran/src/lfortran/fortran_evaluator.cpp", line 110, in LCompilers::FortranEvaluator::evaluate(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, bool, LCompilers::LocationManager&, LCompilers::PassManager&, LCompilers::diag::Diagnostics&)
    pass_manager, diagnostics, lm.files.back().in_filename);
  File "/home/saurabh-kumar/Projects/System/lfortran/src/lfortran/fortran_evaluator.cpp", line 359, in LCompilers::FortranEvaluator::get_llvm3(LCompilers::ASR::TranslationUnit_t&, LCompilers::PassManager&, LCompilers::diag::Diagnostics&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)
    compiler_options, run_fn, infile);
  File "/home/saurabh-kumar/Projects/System/lfortran/src/libasr/codegen/asr_to_llvm.cpp", line 9831, in LCompilers::asr_to_llvm(LCompilers::ASR::TranslationUnit_t&, LCompilers::diag::Diagnostics&, llvm::LLVMContext&, Allocator&, LCompilers::PassManager&, LCompilers::CompilerOptions&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)
    pass_manager.apply_passes(al, &asr, co.po, diagnostics);
  File "/home/saurabh-kumar/Projects/System/lfortran/src/libasr/pass/pass_manager.h", line 311, in LCompilers::PassManager::apply_passes(Allocator&, LCompilers::ASR::TranslationUnit_t*, LCompilers::PassOptions&, LCompilers::diag::Diagnostics&)
    apply_passes(al, asr, _passes, pass_options, diagnostics);
  File "/home/saurabh-kumar/Projects/System/lfortran/src/libasr/pass/pass_manager.h", line 167, in LCompilers::PassManager::apply_passes(Allocator&, LCompilers::ASR::TranslationUnit_t*, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >&, LCompilers::PassOptions&, LCompilers::diag::Diagnostics&)
    _passes_db[passes[i]](al, *asr, pass_options);
LCompilersException: Return type not supported in interactive mode
>>> 1                                                                    1,2   ]
1
>>> [1, 2, 3, 4]                                                         1,13  ]
Internal Compiler Error: Unhandled exception
Traceback (most recent call last):
  Binary file "/home/saurabh-kumar/Projects/System/lfortran/src/bin/lfortran", in _start()
  File "./csu/../csu/libc-start.c", line 360, in __libc_start_main_impl()
  File "./csu/../sysdeps/x86/libc-start.c", line 58, in __libc_start_call_main()
  File "/home/saurabh-kumar/Projects/System/lfortran/src/bin/lfortran.cpp", line 2462, in main()
    return main_app(argc, argv);
  File "/home/saurabh-kumar/Projects/System/lfortran/src/bin/lfortran.cpp", line 2256, in main_app(int, char**)
    return prompt(arg_v, compiler_options);
  File "/home/saurabh-kumar/Projects/System/lfortran/src/bin/lfortran.cpp", line 298, in prompt()
    res = e.evaluate(input, verbose, lm, lpm, diagnostics);
  File "/home/saurabh-kumar/Projects/System/lfortran/src/lfortran/fortran_evaluator.cpp", line 110, in LCompilers::FortranEvaluator::evaluate(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, bool, LCompilers::LocationManager&, LCompilers::PassManager&, LCompilers::diag::Diagnostics&)
    pass_manager, diagnostics, lm.files.back().in_filename);
  File "/home/saurabh-kumar/Projects/System/lfortran/src/lfortran/fortran_evaluator.cpp", line 359, in LCompilers::FortranEvaluator::get_llvm3(LCompilers::ASR::TranslationUnit_t&, LCompilers::PassManager&, LCompilers::diag::Diagnostics&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)
    compiler_options, run_fn, infile);
  File "/home/saurabh-kumar/Projects/System/lfortran/src/libasr/codegen/asr_to_llvm.cpp", line 9831, in LCompilers::asr_to_llvm(LCompilers::ASR::TranslationUnit_t&, LCompilers::diag::Diagnostics&, llvm::LLVMContext&, Allocator&, LCompilers::PassManager&, LCompilers::CompilerOptions&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)
    pass_manager.apply_passes(al, &asr, co.po, diagnostics);
  File "/home/saurabh-kumar/Projects/System/lfortran/src/libasr/pass/pass_manager.h", line 311, in LCompilers::PassManager::apply_passes(Allocator&, LCompilers::ASR::TranslationUnit_t*, LCompilers::PassOptions&, LCompilers::diag::Diagnostics&)
    apply_passes(al, asr, _passes, pass_options, diagnostics);
  File "/home/saurabh-kumar/Projects/System/lfortran/src/libasr/pass/pass_manager.h", line 167, in LCompilers::PassManager::apply_passes(Allocator&, LCompilers::ASR::TranslationUnit_t*, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >&, LCompilers::PassOptions&, LCompilers::diag::Diagnostics&)
    _passes_db[passes[i]](al, *asr, pass_options);
LCompilersException: Return type not supported in interactive mode
>>>   

[Vipul-Cariappa]

Yes, I know. I am working on a fix for booleans right now. Others are quite involved. Will have to tackle other datatypes later.

[certik]

Yes, I think we have not implemented booleans as return types yet from LLVM in interactive mode.