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fix a bug in AddSymbolicGradients

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This commit is contained in:
sunchenggen 2020-03-18 15:43:21 +08:00
parent 6a580fd9ac
commit c2f7bee604
1 changed files with 3 additions and 3 deletions
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6
tensorflow/cc/framework/gradients.cc
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@ -521,15 +521,15 @@ Status SymbolicGradientBuilder::AddGradients() {
// gradient function to the src node/output to which it should be
// backpropped. Maybe grad functions can return a vector of Output pairs to
// make this association explicit.
size_t dx_index = 0;
for (const Edge* e : n->in_edges()) {
if (e->IsControlEdge()) continue;
if (dx_index == dx.size()) {
int dx_index = e->dst_input();
if (dx_index >= dx.size()) {
return errors::Internal(
"Invalid gradient output index: ", dx_index, " size: ", dx.size());
}
TF_RETURN_IF_ERROR(
BackpropAlongEdge(dx[dx_index++], {e->src(), e->src_output()}));
BackpropAlongEdge(dx[dx_index], {e->src(), e->src_output()}));
}
}