Properly handle nulls in runtime upcast checks #2042
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cc @trusktr Can you confirm that this fixes the issue you are seeing? |
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I need to try this. I have TODO comments in place. |
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Fixes #2035 by bypassing
nullvalues in emitted runtime upcast checks (which__instanceofnaturally cannot handle) while keeping the current behavior as a simplification where the value can be statically determined to be non-null.