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var.js
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var.js
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// ============================================
// COMPREHENSIVE VAR DECLARATION BUG TEST
// ============================================
console.log('=== TEST 1: Regular IIFE (baseline) ===');
(function () {
var a = 1;
var b = 2,
c = 3;
if (true) {
var d = 4;
}
{
var e = 5;
}
for (var f = 6; f < 7; f++) {
var g = 7;
}
while (false) {
var h = 8;
}
do {
var i = 9;
} while (false);
try {
var j = 10;
} catch (err) {
var k = 11;
}
console.log(' a=' + a + ' b=' + b + ' c=' + c + ' d=' + d + ' e=' + e + ' f=' + f + ' g=' + g + ' h=' + h + ' i=' + i + ' j=' + j + ' k=' + k);
})();
console.log('\n=== TEST 2: Arrow IIFE ===');
(() => {
var a = 1;
var b = 2,
c = 3;
if (true) {
var d = 4;
}
{
var e = 5;
}
for (var f = 6; f < 7; f++) {
var g = 7;
}
console.log(' a=' + a + ' b=' + b + ' c=' + c + ' d=' + d + ' e=' + e + ' f=' + f + ' g=' + g);
})();
console.log('\n=== TEST 3: User-defined callback ===');
function callFn(cb) {
cb(100);
}
callFn(function (x) {
var a = 1;
var b = 2,
c = 3;
if (true) {
var d = 4;
}
for (var f = 6; f < 7; f++) {
var g = 7;
}
console.log(' a=' + a + ' b=' + b + ' c=' + c + ' d=' + d + ' f=' + f + ' g=' + g + ' x=' + x);
});
console.log('\n=== TEST 4: User-defined callback (arrow) ===');
callFn(x => {
var a = 1;
var b = 2,
c = 3;
if (true) {
var d = 4;
}
for (var f = 6; f < 7; f++) {
var g = 7;
}
console.log(' a=' + a + ' b=' + b + ' c=' + c + ' d=' + d + ' f=' + f + ' g=' + g + ' x=' + x);
});
console.log('\n=== TEST 5: forEach with regular function ===');
[1].forEach(function (x, idx, arr) {
var a = 1;
var b = 2,
c = 3;
if (true) {
var d = 4;
}
{
var e = 5;
}
for (var f = 6; f < 7; f++) {
var g = 7;
}
while (false) {
var h = 8;
}
do {
var i = 9;
} while (false);
try {
var j = 10;
} catch (err) {
var k = 11;
}
switch (1) {
case 1:
var l = 12;
break;
}
console.log(
' a=' + a + ' b=' + b + ' c=' + c + ' d=' + d + ' e=' + e + ' f=' + f + ' g=' + g + ' h=' + h + ' i=' + i + ' j=' + j + ' k=' + k + ' l=' + l
);
});
console.log('\n=== TEST 6: forEach with arrow function ===');
[1].forEach((x, idx, arr) => {
var a = 1;
var b = 2,
c = 3;
if (true) {
var d = 4;
}
{
var e = 5;
}
for (var f = 6; f < 7; f++) {
var g = 7;
}
console.log(' a=' + a + ' b=' + b + ' c=' + c + ' d=' + d + ' e=' + e + ' f=' + f + ' g=' + g);
});
console.log('\n=== TEST 7: map with regular function ===');
[1].map(function (x) {
var a = 1;
if (true) {
var b = 2;
}
for (var c = 3; c < 4; c++) {
var d = 4;
}
console.log(' a=' + a + ' b=' + b + ' c=' + c + ' d=' + d);
return x;
});
console.log('\n=== TEST 8: filter with regular function ===');
[1].filter(function (x) {
var a = 1;
if (true) {
var b = 2;
}
for (var c = 3; c < 4; c++) {
var d = 4;
}
console.log(' a=' + a + ' b=' + b + ' c=' + c + ' d=' + d);
return true;
});
console.log('\n=== TEST 9: reduce with regular function ===');
[1, 2].reduce(function (acc, x) {
var a = 1;
if (true) {
var b = 2;
}
for (var c = 3; c < 4; c++) {
var d = 4;
}
console.log(' a=' + a + ' b=' + b + ' c=' + c + ' d=' + d + ' acc=' + acc + ' x=' + x);
return acc + x;
}, 0);
console.log('\n=== TEST 10: find with regular function ===');
[1].find(function (x) {
var a = 1;
for (var b = 2; b < 3; b++) {
var c = 3;
}
console.log(' a=' + a + ' b=' + b + ' c=' + c);
return true;
});
console.log('\n=== TEST 11: some with regular function ===');
[1].some(function (x) {
var a = 1;
for (var b = 2; b < 3; b++) {
var c = 3;
}
console.log(' a=' + a + ' b=' + b + ' c=' + c);
return true;
});
console.log('\n=== TEST 12: every with regular function ===');
[1].every(function (x) {
var a = 1;
for (var b = 2; b < 3; b++) {
var c = 3;
}
console.log(' a=' + a + ' b=' + b + ' c=' + c);
return true;
});
console.log('\n=== TEST 13: sort with regular function ===');
[2, 1].sort(function (a, b) {
var v = 1;
for (var i = 0; i < 1; i++) {
var w = 2;
}
console.log(' v=' + v + ' i=' + i + ' w=' + w);
return a - b;
});
console.log('\n=== TEST 14: flatMap with regular function ===');
[1].flatMap(function (x) {
var a = 1;
for (var b = 2; b < 3; b++) {
var c = 3;
}
console.log(' a=' + a + ' b=' + b + ' c=' + c);
return [x];
});
console.log('\n=== TEST 15: findIndex with regular function ===');
[1].findIndex(function (x) {
var a = 1;
for (var b = 2; b < 3; b++) {
var c = 3;
}
console.log(' a=' + a + ' b=' + b + ' c=' + c);
return true;
});
console.log('\n=== TEST 16: let/const in forEach (should work) ===');
[1].forEach(function (x) {
let a = 1;
const b = 2;
let c = 3,
d = 4;
if (true) {
let e = 5;
var f = 6;
}
for (let g = 7; g < 8; g++) {
let h = 8;
var i = 9;
}
console.log(' a=' + a + ' b=' + b + ' c=' + c + ' d=' + d + ' f=' + f + ' i=' + i);
});
console.log('\n=== TEST 17: Nested forEach ===');
[1].forEach(function (x) {
var outer = 'outer';
[2].forEach(function (y) {
var inner = 'inner';
for (var z = 0; z < 1; z++) {
var inFor = 'inFor';
}
console.log(' outer=' + outer + ' inner=' + inner + ' z=' + z + ' inFor=' + inFor);
});
});
console.log('\n=== TEST 18: setTimeout callback ===');
setTimeout(function () {
var a = 1;
if (true) {
var b = 2;
}
for (var c = 3; c < 4; c++) {
var d = 4;
}
console.log(' setTimeout: a=' + a + ' b=' + b + ' c=' + c + ' d=' + d);
}, 0);
console.log('\n=== TEST 19: Promise.then callback ===');
Promise.resolve(1).then(function (x) {
var a = 1;
if (true) {
var b = 2;
}
for (var c = 3; c < 4; c++) {
var d = 4;
}
console.log(' Promise.then: a=' + a + ' b=' + b + ' c=' + c + ' d=' + d);
});
console.log('\n=== TEST 20: Object methods ===');
Object.keys({ a: 1 }).forEach(function (k) {
var v = 'test';
for (var i = 0; i < 1; i++) {
var w = 'for';
}
console.log(' Object.keys.forEach: v=' + v + ' i=' + i + ' w=' + w);
});
console.log('\n=== TEST 21: String methods ===');
'abc'.split('').forEach(function (c) {
var v = 'test';
for (var i = 0; i < 1; i++) {
var w = 'for';
}
console.log(' String.split.forEach: v=' + v + ' i=' + i + ' w=' + w + ' c=' + c);
});
console.log('\n=== TEST 22: Map.forEach ===');
new Map([['a', 1]]).forEach(function (v, k) {
var a = 1;
for (var i = 0; i < 1; i++) {
var b = 2;
}
console.log(' Map.forEach: a=' + a + ' i=' + i + ' b=' + b);
});
console.log('\n=== TEST 23: Set.forEach ===');
new Set([1]).forEach(function (v) {
var a = 1;
for (var i = 0; i < 1; i++) {
var b = 2;
}
console.log(' Set.forEach: a=' + a + ' i=' + i + ' b=' + b);
});
console.log('\n=== TEST 24: for...of loop ===');
for (var item of [1, 2]) {
var a = 'test';
console.log(' for...of: item=' + item + ' a=' + a);
}
console.log('\n=== TEST 25: for...in loop ===');
for (var key in { a: 1, b: 2 }) {
var v = 'test';
console.log(' for...in: key=' + key + ' v=' + v);
}
console.log('\n=== TEST 26: Nested functions in forEach ===');
[1].forEach(function (x) {
var outer = 'outer';
function inner() {
var innerVar = 'inner';
console.log(' nested fn: outer=' + outer + ' innerVar=' + innerVar);
}
inner();
console.log(' forEach body: outer=' + outer);
});
console.log('\n=== TEST 27: var in different for variants ===');
[1].forEach(function (x) {
for (var a = 0; a < 1; a++) {}
for (var b in { x: 1 }) {
}
for (var c of [1]) {
}
var d = 'plain';
console.log(' a=' + a + ' b=' + b + ' c=' + c + ' d=' + d);
});
console.log('\n=== TEST 28: Hoisting test ===');
[1].forEach(function (x) {
console.log(' before: a=' + a + ' b=' + b);
var a = 1;
for (var b = 2; b < 3; b++) {}
console.log(' after: a=' + a + ' b=' + b);
});
console.log('\n=== TEST 29: Function expression assignment ===');
[1].forEach(function (x) {
var fn = function () {
return 'test';
};
for (var i = 0; i < 1; i++) {
var fn2 = function () {
return 'for';
};
}
console.log(' fn=' + fn + ' fn()=' + (fn ? fn() : 'N/A') + ' fn2()=' + (fn2 ? fn2() : 'N/A'));
});
console.log('\n=== TEST 30: Destructuring var ===');
try {
[1].forEach(function (x) {
var [a, b] = [1, 2];
var { c, d } = { c: 3, d: 4 };
for (var [e] = [5]; e < 6; e++) {}
console.log(' a=' + a + ' b=' + b + ' c=' + c + ' d=' + d + ' e=' + e);
});
} catch (e) {
console.log(' destructuring error: ' + e.message);
}
console.log('\n=== ASYNC TESTS (will print after) ===');

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