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fix label-related bugs (#1835)

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- deep cloning of `AST_LabeledStatement`
- `L:do{...}while(false)`
- empty statement with label within block

extend `test/ufuzz.js`
- generate labels for blocks & loops
- generate for-in statements
- skip suspicious option search if `minify()` errs


fixes #1833
This commit is contained in:
Alex Lam S.L
2017-04-22 22:15:04 +08:00
committed by GitHub
parent 6f954aa3d0
commit ca32a09032
5 changed files with 244 additions and 79 deletions
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134
test/compress/issue-1833.js Normal file
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@@ -0,0 +1,134 @@
iife_for: {
options = {
negate_iife: true,
reduce_vars: true,
toplevel: true,
unused: true,
}
input: {
function f() {
function g() {
L: for (;;) break L;
}
g();
}
f();
}
expect: {
!function() {
!function() {
L: for (;;) break L;
}();
}();
}
}
iife_for_in: {
options = {
negate_iife: true,
reduce_vars: true,
toplevel: true,
unused: true,
}
input: {
function f() {
function g() {
L: for (var a in x) break L;
}
g();
}
f();
}
expect: {
!function() {
!function() {
L: for (var a in x) break L;
}();
}();
}
}
iife_do: {
options = {
negate_iife: true,
reduce_vars: true,
toplevel: true,
unused: true,
}
input: {
function f() {
function g() {
L: do {
break L;
} while (1);
}
g();
}
f();
}
expect: {
!function() {
!function() {
L: do {
break L;
} while (1);
}();
}();
}
}
iife_while: {
options = {
negate_iife: true,
reduce_vars: true,
toplevel: true,
unused: true,
}
input: {
function f() {
function g() {
L: while (1) break L;
}
g();
}
f();
}
expect: {
!function() {
!function() {
L: while (1) break L;
}();
}();
}
}
label_do: {
options = {
evaluate: true,
loops: true,
}
input: {
L: do {
continue L;
} while (0);
}
expect: {
L: do {
continue L;
} while (0);
}
}
label_while: {
options = {
evaluate: true,
dead_code: true,
loops: true,
}
input: {
function f() {
L: while (0) continue L;
}
}
expect_exact: "function f(){L:;}"
}