Make sbt fork := true

Current implementation of symhash is not thread safe

1 files changed, 2 insertions, 0 deletions

diff --git a/build.sbt b/build.sbt
index b69915da..e0571ccd 100644
--- a/build.sbt
+++ b/build.sbt
@@ -35,3 +35,5 @@ antlr4GenVisitor in Antlr4 := true // default = false
 antlr4GenListener in Antlr4 := false // default = true
 
 antlr4PackageName in Antlr4 := Option("firrtl.antlr")
+
+fork := true