Type_descr.join: preserve aliases on join with Bottom #327
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I've rebased this PR on top of #329, as without it we generate wrong code, and added an example. |
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Good when 329 is in |
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I'd like the test to be added to the testsuite : if this allocates, the join fails. This should probably wait for the new unboxing for this to be valid. And the test needs to be changed a bit so that |
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I'm a bit surprised that
Type_descr.joindoesn't seem to care whether the resulting type is valid in the target env, but at least when coming fromTyping_env_level.jointhe target env always contains all the names from both branches, so this should be safe.