core: Detect and reject self-referencing local values #19706
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mildwonkey
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Dec 19, 2018
We already catch indirect cycles through the normal cycle detector, but we never create self-edges in the graph so we need to handle a direct self-reference separately here. The prior behavior was simply to produce an incorrect result (since the local value wasn't assigned a new value yet). This fixes #18503.
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We already catch indirect cycles through the normal cycle detector, but we never create self-edges in the graph so we need to handle a direct self-reference separately here.
The prior behavior was simply to produce an incorrect result (since the local value wasn't assigned a new value yet).
This fixes #18503.