From: eregontp@... Date: 2021-03-24T19:54:18+00:00 Subject: [ruby-core:103002] [Ruby master Feature#17743] Show argument types in backtrace Issue #17743 has been updated by Eregon (Benoit Daloze). How would your format when the method takes multiple arguments? Should we show the value or just the class? I think in general this can be useful, but at the same time it's not nearly as useful as a debugger, and it can be a significant performance overhead for JITs/VMs which would then need to collect all frames and arguments in every exception's backtrace, as well as a copy of the arguments array (instead of just [call site bci/node, called method name/target]). ---------------------------------------- Feature #17743: Show argument types in backtrace https://bugs.ruby-lang.org/issues/17743#change-91065 * Author: p8 (Petrik de Heus) * Status: Open * Priority: Normal ---------------------------------------- Given the following Ruby program: ``` ruby def say_hi(person) puts message(person) end def message(person) "hi: #{person.name}" end say_hi(nil) ``` It would be helpful if the backtrace contained the types of the argumets: ``` hi.rb:6:in `message': undefined method `name' for nil:NilClass (NoMethodError) from hi.rb:2:in `say_hi' called with NilClass from hi.rb:9:in `
' called with NilClass ``` Inspired by the following Twitter thread: https://twitter.com/lzsthw/status/1374350046909628423 -- https://bugs.ruby-lang.org/ Unsubscribe: