`throw()` doesn't work in Cling on Windows x64

[bellenot]

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Description

As discovered in #17536 , throw() makes root silently crash on Windows x64

Reproducer

C:\root-dev\build\x64\debug>root -l
root [0] void fun(){throw std::runtime_error("");}
root [1] fun()

C:\root-dev\build\x64\debug>

But works fine on x86:

C:\root-dev\build\x86\nowinrtdebug\debug>root -l
root [0] void fun(){throw std::runtime_error("const std::vector<std::string> & overload");}
root [1] fun()
Error in <TRint::HandleTermInput()>: std::runtime_error caught: const std::vector<std::string> & overload
root [2]

ROOT version

6.35.01 but most probably all versions

Installation method

built from source

Operating system

Windows (x64)

Additional context

No response

[pcanal]

More exactly it seems to be that Cling throws the exception in a way that the 'catch' in (compiled code in) TRint can not catch it.

The (expected) behavior in linux is:

cmslpc-el9-heavy01:src (master-non-defaults-enums) pcanal$ root.exe -b -l 
root [0] void fun(){throw std::runtime_error("fun threw an exception");}
root [1] fun()
Error in <TRint::HandleTermInput()>: std::runtime_error caught: fun threw an exception

[bellenot]

@pcanal right, like on Windows x86:

C:\root-dev\build\x86\nowinrtdebug\debug>root -l
root [0] void fun(){throw std::runtime_error("const std::vector<std::string> & overload");}
root [1] fun()
Error in <TRint::HandleTermInput()>: std::runtime_error caught: const std::vector<std::string> & overload
root [2]

[devajithvs]

I am wondering if this is due to the usage of setjmp library call in windows. Using: https://learn.microsoft.com/en-us/cpp/cpp/structured-exception-handling-c-cpp?view=msvc-170 might fix it.

[bellenot]

Thanks @devajithvs , but it fails also in cling...