Implement error check for negative edge weights in GCNConv #10549
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Add error handling for negative edge weights in GCN.
vertumnal
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akihironitta,
rusty1s and
wsad1
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Negative weights lead to NaN values during normalization and may cause an indefinite hang when executed on CUDA. This adds a small check to validate the edge weights supplied as input are positive. Related to #10548 Fixes #795, #61