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author | Paul Phillips <paulp@improving.org> | 2012-05-03 23:11:05 -0700 |
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committer | Paul Phillips <paulp@improving.org> | 2012-05-04 01:22:23 -0700 |
commit | 01f6ed8e22d02811fe62b9183d9f84bdda5ede4b (patch) | |
tree | 6cc9b5a4847ba7940ddd8313a1a906b06024b5bf /test/simplejson | |
parent | aad6deae7204a7fc95b59ede61b188bb62f51188 (diff) | |
download | scala-01f6ed8e22d02811fe62b9183d9f84bdda5ede4b.tar.gz scala-01f6ed8e22d02811fe62b9183d9f84bdda5ede4b.tar.bz2 scala-01f6ed8e22d02811fe62b9183d9f84bdda5ede4b.zip |
Fix for one of the oldest open soundness bugs.
Closes SI-963, since it was one of my random 30 it won the prize.
The trick after adding the stability check (which has been sitting
there commented out for 3+ years) was that implicit search depended
on the wrongness, because memberWildcardType would create scopes
with members of the form
?{ val name: tp }
And since a def shouldn't match that, fixing it broke everything
until I flipped it around: memberWildcardType should be seeking
?{ def name: tp }
It could also search for a mutable value: the relevant quality
is that it not be stable so it doesn't have a tighter type than
the members it hopes to match.
Diffstat (limited to 'test/simplejson')
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