Classes: Partial fix for constructor not calling super

src/ia32/full-codegen-ia32.cc

Index: src/ia32/full-codegen-ia32.cc
diff --git a/src/ia32/full-codegen-ia32.cc b/src/ia32/full-codegen-ia32.cc
index acf59b4d86c14286814ebc88dc60b0367097a857..6348a934f6f86f5386aa081bb8a9b010cae3b4f0 100644
--- a/src/ia32/full-codegen-ia32.cc
+++ b/src/ia32/full-codegen-ia32.cc
@@ -405,7 +405,9 @@ void FullCodeGenerator::EmitReturnSequence() {
     Label check_exit_codesize;
     masm_->bind(&check_exit_codesize);
 #endif
-    SetSourcePosition(function()->end_position() - 1);
+    if (function()->end_position() != RelocInfo::kNoPosition) {
+      SetSourcePosition(function()->end_position() - 1);
+    }
     __ RecordJSReturn();
     // Do not use the leave instruction here because it is too short to
     // patch with the code required by the debugger.