From 7a66b4fea40bc5a9f20f86beed9abc64c2adcee4 Mon Sep 17 00:00:00 2001
From: Vern Paxson <vern@corelight.com>
Date: Thu, 23 Dec 2021 11:37:45 -0800
Subject: [PATCH] fix: ZAM could misinterpret a "type" switch that starts with
 a "default"

---
 src/script_opt/ZAM/Stmt.cc | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/src/script_opt/ZAM/Stmt.cc b/src/script_opt/ZAM/Stmt.cc
index f6af240c95..a9c5637310 100644
--- a/src/script_opt/ZAM/Stmt.cc
+++ b/src/script_opt/ZAM/Stmt.cc
@@ -410,12 +410,10 @@ const ZAMStmt ZAMCompiler::CompileSwitch(const SwitchStmt* sw)
 	// Need to track a new set of contexts for "break" statements.
 	PushBreaks();
 
-	auto& cases = *sw->Cases();
-
-	if ( cases.length() > 0 && cases[0]->TypeCases() )
-		return TypeSwitch(sw, n, c);
-	else
+	if ( sw->TypeMap()->empty() )
 		return ValueSwitch(sw, n, c);
+	else
+		return TypeSwitch(sw, n, c);
 	}
 
 const ZAMStmt ZAMCompiler::ValueSwitch(const SwitchStmt* sw, const NameExpr* v, const ConstExpr* c)