An error I don't understand

Help & Support
1

Run this is playground and all seems well:

s = “”
(s = “123”).size
s.size

Omit (or comment out) the first line (s = “”) and a strange error occurs:

(s = “123”).size
s.size

Bug

You’ve reached a bug in the playground. Please let us know about it.

Code

(s = “123”).size s.size

Exception

error in line 4 Error: instantiating ‘Crystal::Playground::Agent#i(Int32)’ error in line 4 Error: instantiating ‘Crystal::Playground::Agent#i(Int32)’ error in line 5 Error: undefined local variable or method ‘s’ for top-level Did you mean ‘p’?

The “let us know” takes me to “GitHub” where I’m expected to have an account. I don’t use Github, because it is owned by Microsoft.

Anyway, this seems like some kind of error in Crystal or something.

2

Yes, this is an issue with the playground specifically and has been reported as Playground crashes when accessing variable assigned in the previous line in an assignment expression. · Issue #7091 · crystal-lang/crystal · GitHub.

3

Good to know others have found/reported this issue as well.
Thank you for responding. My excitement for Crystal 1.0 could not be greater.