diff --git a/scripts/test.sh b/scripts/test.sh
index 4cb6325..b020629 100755
--- a/scripts/test.sh
+++ b/scripts/test.sh
@@ -1,6 +1,6 @@
 #! /usr/bin/env bash
 
-JS_SLANG="node node_modules/js-slang/dist/repl/repl.js"
+JS_SLANG="node --stack-size=2000 node_modules/js-slang/dist/repl/repl.js"
 
 # must use BSD awk
 AWK="awk"
diff --git a/src/evaluators/__tests__/source-4-3.test1.js b/src/evaluators/__tests__/source-4-3.test1.js
new file mode 100644
index 0000000..49621d7
--- /dev/null
+++ b/src/evaluators/__tests__/source-4-3.test1.js
@@ -0,0 +1,2 @@
+parse_and_run('function a(){const b = 2; return b;} a();');
+// 2
diff --git a/src/evaluators/__tests__/source-4-3.test2.js b/src/evaluators/__tests__/source-4-3.test2.js
new file mode 100644
index 0000000..668469a
--- /dev/null
+++ b/src/evaluators/__tests__/source-4-3.test2.js
@@ -0,0 +1,7 @@
+parse_and_run('function factorial(n) {\n' +
+    '    return n === 1\n' +
+    '        ? 1\n' +
+    '        : factorial(n - 1) * n;\n' +
+    '}' +
+    'factorial(4);');
+// 24
diff --git a/src/evaluators/__tests__/source-4-3.test3.js b/src/evaluators/__tests__/source-4-3.test3.js
new file mode 100644
index 0000000..9e0ba43
--- /dev/null
+++ b/src/evaluators/__tests__/source-4-3.test3.js
@@ -0,0 +1,7 @@
+parse_and_run('function x() {\n' +
+    '    let a = 1;\n' +
+    '    return a;\n' +
+    '    a = 2;\n' +
+    '}\n' +
+    'x();');
+// 1
diff --git a/src/evaluators/__tests__/source-4-3.test4.js b/src/evaluators/__tests__/source-4-3.test4.js
new file mode 100644
index 0000000..4eae22a
--- /dev/null
+++ b/src/evaluators/__tests__/source-4-3.test4.js
@@ -0,0 +1,5 @@
+parse_and_run("function foo() {\
+    return 5;\
+}\
+foo();");
+// 5
diff --git a/src/evaluators/__tests__/source-4-3.test5.js b/src/evaluators/__tests__/source-4-3.test5.js
new file mode 100644
index 0000000..184003b
--- /dev/null
+++ b/src/evaluators/__tests__/source-4-3.test5.js
@@ -0,0 +1,31 @@
+const result = parse_and_run(" \
+function multiple_dwelling() { \
+const baker = amb(1, 2, 3, 4, 5); \
+const cooper = amb(1, 2, 3, 4, 5); \
+const fletcher = amb(1, 2, 3, 4, 5); \
+const miller = amb(1, 2, 3, 4, 5); \
+const smith = amb(1, 2, 3, 4, 5); \
+require(distinct(list(baker, cooper, fletcher, miller, smith))); \
+require(! (baker === 5)); \
+require(! (cooper === 1)); \
+require(! (fletcher === 5)); \
+require(! (fletcher === 1)); \
+require(! (miller > cooper)); \
+require(! ((math_abs(smith - fletcher)) === 1)); \
+require(! ((math_abs(fletcher - cooper)) === 1)); \
+return list(list('baker', baker), \
+list('cooper', cooper), \
+list('fletcher', fletcher), \
+list('miller', miller), \
+list('smith', smith)); \
+} \
+multiple_dwelling(); \
+");
+
+function print_one_line_list(li) {
+    let result = "";
+    for_each((s) => { result = result + head(s) + stringify(head(tail(s))) + ","; }, li);
+    return result;
+}
+print_one_line_list(result);
+// 'baker1,cooper4,fletcher2,miller3,smith5,'
diff --git a/src/evaluators/source-4-3.js b/src/evaluators/source-4-3.js
index 25bf5eb..56de670 100644
--- a/src/evaluators/source-4-3.js
+++ b/src/evaluators/source-4-3.js
@@ -588,7 +588,7 @@ function analyze_sequence(stmts) {
             a(env,
                 (a_value, fail2) => {
                     if (is_return_value(a_value)) {
-                        return succeed(return_value_content(a_value), fail2);
+                        return succeed(a_value, fail2);
                     } else {
                         return b(env, succeed, fail2);
                     }
@@ -613,8 +613,7 @@ function analyze_sequence(stmts) {
 function analyze_block(stmts) {
     const body = block_body(stmts);
     const locals = local_names(body);
-    const temp_values = map(x => no_value_yet,
-        locals);
+    const temp_values = map(x => no_value_yet, locals);
     return (env, succeed, fail) => analyze(body)(extend_environment(locals, temp_values, env), succeed, fail);
 }
 
@@ -732,7 +731,6 @@ function execute_application(fun, args, succeed, fail) {
                 function_environment(fun)),
             (return_value, fail2) => {
                 if (is_return_value(return_value)) {
-
                     return succeed(return_value_content(return_value),fail2);
                 } else {
                     return succeed(undefined,fail2);
@@ -844,32 +842,36 @@ function parse_and_run(str) {
 //     'factorial(4);');
 
 // parse_and_run('function x() {\n' +
-//     '    const a = 1;\n' +
+//     '    let a = 1;\n' +
 //     '    return a;\n' +
 //     '    a = 2;\n' +
 //     '}\n' +
 //     'x();');
 
-parse_and_run(" \
-function multiple_dwelling() { \
-const baker = amb(1, 2, 3, 4, 5); \
-const cooper = amb(1, 2, 3, 4, 5); \
-const fletcher = amb(1, 2, 3, 4, 5); \
-const miller = amb(1, 2, 3, 4, 5); \
-const smith = amb(1, 2, 3, 4, 5); \
-require(distinct(list(baker, cooper, fletcher, miller, smith))); \
-require(! (baker === 5)); \
-require(! (cooper === 1)); \
-require(! (fletcher === 5)); \
-require(! (fletcher === 1)); \
-require(! (miller > cooper)); \
-require(! ((math_abs(smith - fletcher)) === 1)); \
-require(! ((math_abs(fletcher - cooper)) === 1)); \
-return list(list('baker', baker), \
-list('cooper', cooper), \
-list('fletcher', fletcher), \
-list('miller', miller), \
-list('smith', smith)); \
-} \
-multiple_dwelling(); \
-");
+// parse_and_run("function foo() {\
+//     return 5;\
+// }\
+// foo();");
+// parse_and_run(" \
+// function multiple_dwelling() { \
+// const baker = amb(1, 2, 3, 4, 5); \
+// const cooper = amb(1, 2, 3, 4, 5); \
+// const fletcher = amb(1, 2, 3, 4, 5); \
+// const miller = amb(1, 2, 3, 4, 5); \
+// const smith = amb(1, 2, 3, 4, 5); \
+// require(distinct(list(baker, cooper, fletcher, miller, smith))); \
+// require(! (baker === 5)); \
+// require(! (cooper === 1)); \
+// require(! (fletcher === 5)); \
+// require(! (fletcher === 1)); \
+// require(! (miller > cooper)); \
+// require(! ((math_abs(smith - fletcher)) === 1)); \
+// require(! ((math_abs(fletcher - cooper)) === 1)); \
+// return list(list('baker', baker), \
+// list('cooper', cooper), \
+// list('fletcher', fletcher), \
+// list('miller', miller), \
+// list('smith', smith)); \
+// } \
+// multiple_dwelling(); \
+// ");