Do not try to inline if the function has an illegal redeclaration.

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index 1d33bfa6126c7ed6ed889440934b0835616f1fde..eec5de3a0c23004efeeec5ad0d206dfc37ea157e 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -7931,6 +7931,11 @@ bool HOptimizedGraphBuilder::TryInline(Handle<JSFunction> target,
     return false;
   }
 
+  if (target_info.scope()->HasIllegalRedeclaration()) {
+    TraceInline(target, caller, "target has illegal redeclaration");
+    return false;
+  }
+
   if (target_info.scope()->num_heap_slots() > 0) {
     TraceInline(target, caller, "target has context-allocated variables");
     return false;