public_send can be used to invoke protected methods
|ruby -v:||ruby 2.0.0dev (2012-12-03) [x86_64-darwin12.2.1]||Backport:|
puts Foo.public_send(:bar) rescue puts "error; this seems normal"
The last statement outputs "wtf?" on:¶
* ruby-head (2012-12-03)¶
The last statement raises a NoMethodError on:¶
* JRuby 1.7.0¶
* rubinius 2.0.0dev 2279857e¶
I /expected/ the NoMethodError behavior¶
#1 Updated by Charlie Somerville over 2 years ago
- File bug-7499.patch added
rb_method_call_status checks the value of 'self' at the callsite to determine whether protected methods can be called.
Unfortunately this means calls to protected methods via public_send will erroneously succeed if they are in the right scope.
To fix this, I changed the meaning of Qundef as the 'self' argument to rb_call0. Formerly, Qundef meant 'use the self from the current control frame'. Now, Qundef means 'do not consider self so protected methods cannot be called'. I have updated the few calls to rb_call0 to fetch 'self' from the control frame manually. As rb_call0 and rb_method_call_status are static, there is no concern for ABI breakage.
#3 Updated by Nobuyoshi Nakada over 2 years ago
- Status changed from Open to Closed
- % Done changed from 0 to 100
This issue was solved with changeset r38223.
Andy, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.
vm_eval.c: public_send does not consider how it is called