diff options
Diffstat (limited to 'chiselFrontend')
| -rw-r--r-- | chiselFrontend/src/main/scala/chisel3/core/Binding.scala | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/chiselFrontend/src/main/scala/chisel3/core/Binding.scala b/chiselFrontend/src/main/scala/chisel3/core/Binding.scala index 71c441a7..a857ae85 100644 --- a/chiselFrontend/src/main/scala/chisel3/core/Binding.scala +++ b/chiselFrontend/src/main/scala/chisel3/core/Binding.scala @@ -155,7 +155,9 @@ object Binding { // we know the wrapper is missing, whether or not the element is a member of io. // But if it's not an io element, we want to issue the complementary "unbound" error. // Revisit this when we collect error messages instead of throwing exceptions. - x.io.flatten.contains(element) + // The null test below is due to the fact that we may be evaluating the arguments + // of the IO() wrapper itself. + (x.io != null) && x.io.flatten.contains(element) } } } |