Description
Robe checks the initialization of subprocess with text of subprocess' stdout. It checks the existence of word that ends with "Error". But some projects print initial message (before the robe starts), they can print the word "Error" to the stdout.
For example,
WARNING: Some ignorable error occurred during initialization.
#<SomeError cannot load optional module 'liboptional.so'>
... [stack trace]
[1] pry(main)> => "robe on 12345"
In this case, the robe was started normally in ruby process, but emacs-side's robe thinks that it was not started well.
Using external file like .robe-port would be possible solution