I just subscribed, and this is my first post to the list.
The class Promise has a bug in printOn:. It is supposed to print '(???)' if
its value is not yet known. A missing return causes it to continue to print
the actual value, which will hang until the value is known. Same problem if
Promise has an error.
Here's a trivial patch.
diff --git a/kernel/ValueAdapt.st b/kernel/ValueAdapt.st
index d2957fd..95bdfb0 100644
@@ -262,8 +262,8 @@ initialized, I suspend the process until a value has been assigned.'>