Make sure case statements are not treated as a single-statement conte…

…xt. Fixes #456.
dop251 · Nov 18, 2022 · d4bf6fd · d4bf6fd
1 parent 6c0d988
commit d4bf6fd
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Showing 2 changed files with 13 additions and 0 deletions.
diff --git a/compiler_test.go b/compiler_test.go
@@ -5601,6 +5601,18 @@ func TestForInLoopContinueOuter(t *testing.T) {
 	testScript(SCRIPT, _undefined, t)
 }
 
+func TestLexicalDeclInSwitch(t *testing.T) {
+	const SCRIPT = `
+	switch(0) {
+	    case 1:
+	        if (false) b = 3;
+	    case 2:
+	        const c = 1;
+	}
+	`
+	testScript(SCRIPT, _undefined, t)
+}
+
 /*
 func TestBabel(t *testing.T) {
 	src, err := os.ReadFile("babel7.js")

diff --git a/parser/statement.go b/parser/statement.go
@@ -488,6 +488,7 @@ func (self *_parser) parseCaseStatement() *ast.CaseStatement {
 			self.token == token.DEFAULT {
 			break
 		}
+		self.scope.allowLet = true
 		node.Consequent = append(node.Consequent, self.parseStatement())
 
 	}
-Original file line number
+Diff line change
@@ Expand Up @@
     			self.token == token.DEFAULT {
     			break
     		}
+    		self.scope.allowLet = true
     		node.Consequent = append(node.Consequent, self.parseStatement())
     	}
@@ Expand Down @@