throw doesn't work as expected with xeus-cpp

[anutosh491]

I am guessing something changed in clang/clang-repl/llvm after version 17

We could achieve this I think using CppInterOp 1.3.0 (part of our example notebook)

I know throw basically should end "erroring" out ..... but we would prefer something like the above where we error out through the console and not our kernel crashing and restarting

[anutosh491]

I'm sorry, this still works

One might ask why do I see the kernel restarting above ?
Ans: Because I am on Apple Mac M2 and there is something not correct about how exception handling works with any Mac ARM device (llvm/llvm-project#92121)

[anutosh491]

That being said there is still an error here !

I shall be changing the issue title to make a note of it.

This was discovered while playing around with throw. Let's say we miss out of the placeholder from the above catch block (basically any sort of wrong syntax)... this would end up seeing this

clang-repl> #include <stdio.h>            
clang-repl> try { throw 1; } catch { printf("Caught exception\n"); }
In file included from <<< inputs >>>:1:
input_line_2:1:23: error: expected '('
    1 | try { throw 1; } catch { printf("Caught exception\n"); }
      |                       ^
      |                       (
clang-repl: /home/abhinav/Desktop/Coding/CERN_HSF_Compiler_Research/llvm-project/clang/lib/AST/DeclBase.cpp:1737: void clang::DeclContext::addHiddenDecl(clang::Decl*): Assertion `D->getLexicalDeclContext() == this && "Decl inserted into wrong lexical context"' failed.
Aborted (core dumped)

So this segfaults and crashes the clang-repl instance. Whereas I would expected it to gracefully fail giving back a parsing error. Just like what I see below

clang-repl> #include <iostream>
clang-repl> std::cut << "hello";
In file included from <<< inputs >>>:1:
input_line_2:1:6: error: no member named 'cut' in namespace 'std'; did you mean 'cout'?
    1 | std::cut << "hello";
      | ~~~~~^~~
      |      cout
/Users/anutosh491/micromamba/envs/clang-repl-env/bin/../include/c++/v1/iostream:54:42: note: 'cout' declared here
   54 | extern _LIBCPP_EXPORTED_FROM_ABI ostream cout;
      |                                          ^
error: Parsing failed.