[Bug-apl] Crash when evaluating axis function with blank axis parameter

[Elias Mårtenson]

To reproduce, define a function like so:

∇foo[x] y

x+y

∇

Then, run it with an empty axis parameter:

foo[] 2

This gives the following error:

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SEGMENTATION FAULT

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-- Stack trace at main.cc:113

----------------------------------------

0x7fb1cd831b05 __libc_start_main

0x47576b  main

0x50ac5a   Workspace::immediate_execution(bool)

0x4543ae    Command::process_line()

0x454867     Command::process_line(UCS_string&)

0x466666      Executable::execute_body() const

0x4d0d90       StateIndicator::run()

0x487242        Prefix::reduce_statements()

0x484d08         Prefix::reduce_MISC_F_C_B()

0x4cef60          StateIndicator::eval_XB(Token&, Token&, Token&)

0x4fc29f           UserFunction::eval_XB(Value_P, Value_P)

0x4dce4a            Symbol::push_value(Value_P)

0x4dbc8b             Symbol::assign(Value_P, char const*)

0x506420              Value::clone(char const*) const

0x502ef1               Value::Value(Shape const&, char const*)

0x7fb1cf3fb870                

0x475e11                 

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Regards,

Elias