Fix incorrect dependency handling for stream acquisition in thrust::future.

brycelelbach · brycelelbach · commit 65079f90e03e · 2019-08-02T15:54:35.000-07:00
Bug 2646034
diff --git a/thrust/system/cuda/detail/future.inl b/thrust/system/cuda/detail/future.inl
@@ -1121,7 +1121,7 @@ void create_dependencies_impl(
 {
   // We only need to wait on the current dependency if we didn't steal our
   // stream from it.
-  if (!as.acquired_from || *as.acquired_from == I0)
+  if (!as.acquired_from || *as.acquired_from != I0)
   {
     create_dependency(as.stream, std::get<I0>(deps));
   }

Original file line number	Diff line number	Diff line change
`@@ -1121,7 +1121,7 @@ void create_dependencies_impl(`
`1121`	`1121`	`{`
`1122`	`1122`	`// We only need to wait on the current dependency if we didn't steal our`
`1123`	`1123`	`// stream from it.`
`1124`		`- if (!as.acquired_from \|\| *as.acquired_from == I0)`
	`1124`	`+ if (!as.acquired_from \|\| *as.acquired_from != I0)`
`1125`	`1125`	`{`
`1126`	`1126`	`create_dependency(as.stream, std::get<I0>(deps));`
`1127`	`1127`	`}`