Fix #1392: Disallow super-calls that cannot be implemented correctly #6407
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…ctly A call `super[T].m` that resolves to `A.m` cannot be translated to correct bytecode if `A` is a class (not a trait / interface), but not the direct superclass. Invokespecial would select an overriding method in the direct superclass, rather than `A.m`. We allow this if there are statically no intervening overrides. Based on scala/scala@a980fde and scala/scala@0a84038 Note that unlike Scala 2 we do not need to check if the mixin part of a Super is to a direct parent here because this is already done in TypeAssigner. Co-Authored-By: Jason Zaugg <[email protected]> Co-Authored-By: Lukas Rytz <[email protected]>
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odersky
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May 1, 2019
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A call
super[T].mthat resolves toA.mcannot be translated tocorrect bytecode if
Ais a class (not a trait / interface), but notthe direct superclass. Invokespecial would select an overriding method
in the direct superclass, rather than
A.m. We allow this if there arestatically no intervening overrides.
Based on
scala/scala@a980fde
and
scala/scala@0a84038
Note that unlike Scala 2 we do not need to check if the mixin part of a
Super is to a direct parent here because this is already done in
TypeAssigner.
Co-Authored-By: Jason Zaugg [email protected]
Co-Authored-By: Lukas Rytz [email protected]