Re: Segmentation fault when applying reduction over empty matrix

[Dr . Jürgen Sauermann]

    Hi M,
      
      thanks, fixed in SVN 1545.
      
      Best Regards,
      Jürgen

On 3/25/22 3:12 PM, m_misaki@autistici.org wrote:

> Dear
>       maintainers,
>       
>       
>       Segmentation fault is encountered when I am trying to perform a
>       reduction over an empty matrix:
>       
>            +/0 0⍴1
>       
>       
>       
>       ===================================================
>       
>       SEGMENTATION FAULT
>       
>       
>       Here is the stack trace outputted:
>       
>       ----------------------------------------
>       
>       -- Stack trace at main.cc:95
>       
>       ----------------------------------------
>       
>       0x7F41302363C1 __libc_start_main
>       
>       0x7F4130236310
>       
>       0x55D5B2512055   main
>       
>       0x55D5B26B0655    Workspace::immediate_execution(bool)
>       
>       0x55D5B257B6EE     Command::process_line()
>       
>       0x55D5B257B7AD      Command::finish_context()
>       
>       0x55D5B2588E38       Executable::execute_body() const
>       
>       0x55D5B264721C        StateIndicator::run()
>       
>       0x55D5B25C5033         Prefix::reduce_statements()
>       
>       0x55D5B25C65E0          Prefix::reduce_MISC_F_B_()
>       
>       0x55D5B2583D69           DerivedFunction::eval_B(Value_P) const
>       
>       0x55D5B2558C9B            Bif_OPER1_REDUCE::eval_LB(Token&,
>       Value_P) const
>       
>       0x55D5B25566A1             Bif_REDUCE::reduce(Token&, Value_P,
>       unsigned int)
>       
>       0x55D5B26438C3             
>       Bif_F12_PLUS::eval_identity_fun(Value_P, short) const
>       
>       0x55D5B263CC16              
>       ScalarFunction::eval_scalar_identity_fun(Value_P, short, Value_P)
>       
>       0x55D5B2596EC9                IntCell::init_other(void*,
>       Value&, char const*) const
>       
>       0x7F413024B560
>       
>       0x55D5B25196C6
>       
>       ========================================
>       
>       ====================================================
>       
>       
>       The same situation occurs on higher rank arrays like 0 0 0⍴1, 0 1
>       0⍴1, while not on 0 1⍴1, 0 0 1⍴1.
>       
>       Similarly, ⌿ also leads to segmentation fault.
>       
>       
>       Thank you for your attention.
>       
>       
>       M Misaki
>       
>       
>