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fix corner case in collapse_vars (#5018)

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fixes #5017
This commit is contained in:
Alex Lam S.L
2021-06-21 04:12:45 +01:00
committed by GitHub
parent e368d39715
commit 111366fca0
4 changed files with 33 additions and 10 deletions
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5
test/compress/collapse_vars.js
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@@ -4658,6 +4658,7 @@ replace_all_var_scope: {
rename = true
options = {
collapse_vars: true,
reduce_vars: true,
unused: true,
}
mangle = {}
@@ -4676,7 +4677,7 @@ replace_all_var_scope: {
(function(c, o) {
switch (~a) {
case (b += a):
case o++:
case +o:
}
})(--b, a);
console.log(a, b);
@@ -4728,7 +4729,7 @@ cascade_statement: {
}
function f3(a, b) {
for (; a < b; a++)
if (c = a, a && b)
if ((c = a) && b)
var c = c = b(a);
}
}

22
test/compress/destructured.js
View File

@@ -2625,3 +2625,25 @@ issue_4994: {
expect_stdout: "PASS"
node_version: ">=6"
}
issue_5017: {
options = {
collapse_vars: true,
reduce_vars: true,
toplevel: true,
}
input: {
var a = function() {};
var b = c = a;
var c = [ c ] = [ c ];
console.log(c[0] === a ? "PASS" : "FAIL");
}
expect: {
var a = function() {};
var b = a;
var c = [ c ] = [ c = a ];
console.log(c[0] === a ? "PASS" : "FAIL");
}
expect_stdout: "PASS"
node_version: ">=6"
}

9
test/compress/keep_fargs.js
View File

@@ -1151,6 +1151,7 @@ replace_all_var_scope: {
options = {
collapse_vars: true,
keep_fargs: false,
reduce_vars: true,
unused: true,
}
mangle = {}
@@ -1158,8 +1159,8 @@ replace_all_var_scope: {
var a = 100, b = 10;
(function(r, a) {
switch (~a) {
case (b += a):
case a++:
case (b += a):
case a++:
}
})(--b, a);
console.log(a, b);
@@ -1168,8 +1169,8 @@ replace_all_var_scope: {
var a = 100, b = 10;
(function(c) {
switch (~a) {
case (b += a):
case c++:
case (b += a):
case +c:
}
})((--b, a));
console.log(a, b);