Issue #8239 has been updated by nobu (Nobuyoshi Nakada).

Priority changed from High to Normal

Not only this case, some assignments can't include rescue clause, e.g.:

  x = 1
  x += raise rescue 2

makes x 3, while

  x = [1]
  x[0] += raise rescue 2

doesn't change x.

It would be possible to make them consistent all, but obviously causes
an incompatibility.


----------------------------------------
Bug #8239: Inline rescue bug
https://bugs.ruby-lang.org/issues/8239#change-38383

Author: dunric (David Unric)
Status: Open
Priority: Normal
Assignee: matz (Yukihiro Matsumoto)
Category: syntax
Target version: 
ruby -v: 2.0.0p0


There is a possible bug in parsing of inline rescue.
When an inline rescue is a part of multiple assignment and exception is raised, the assignment is silently ignored.

def foo
  raise "error"
end

bar, baz = 1,2    # bar == 1, baz == 2
bar, baz = foo rescue [3,4] # no assignment performed:       bar == 1, baz == 2
                            # expected after the expression: bar == 3, baz == 4

Already discussed at stackoverflow.com:
http://stackoverflow.com/questions/15880136/exceptions-why-does-adding-parenthesis-change-anything


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