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fix corner cases in unused (#5075)

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fixes #5074
This commit is contained in:
Alex Lam S.L
2021-07-12 00:43:13 +01:00
committed by GitHub
parent 1ad830facb
commit 0d350b78bf
2 changed files with 154 additions and 16 deletions
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36
lib/compress.js
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@@ -7132,13 +7132,12 @@ merge(Compressor.prototype, {
prop_keys = [];
prop_map = Object.create(null);
value.properties.forEach(function(prop, index) {
if (prop instanceof AST_ObjectSetter) return;
if (prop instanceof AST_Spread) return prop_map = false;
var key = prop.key;
if (key instanceof AST_Node) key = key.evaluate(compressor, true);
if (key instanceof AST_Node) {
prop_map = false;
} else if (prop_map) {
} else if (prop_map && !(prop instanceof AST_ObjectSetter)) {
prop_map[key] = prop;
}
prop_keys[index] = key;
@@ -7184,7 +7183,13 @@ merge(Compressor.prototype, {
if (drop_keys && !(key in drop_keys)) {
if (mapped) {
drop_keys[key] = mapped;
if (value === null) prop_map[key] = false;
if (value === null) {
prop_map[key] = mapped.key instanceof AST_Node
&& make_node(AST_ObjectKeyVal, mapped, {
key: mapped.key,
value: make_node(AST_Number, mapped, { value: 0 }),
});
}
} else {
drop_keys[key] = true;
}
@@ -7201,25 +7206,26 @@ merge(Compressor.prototype, {
});
value = save_value;
drop = save_drop;
if (drop_keys && prop_keys) value.properties = value.properties.filter(function(prop, index) {
if (prop instanceof AST_ObjectSetter) return false;
if (prop instanceof AST_Spread) return true;
if (drop_keys && prop_keys) value.properties = List(value.properties, function(prop, index) {
if (prop instanceof AST_Spread) return prop;
var key = prop_keys[index];
if (key instanceof AST_Node) return true;
if (key instanceof AST_Node) return prop;
if (key in drop_keys) {
var mapped = drop_keys[key];
if (!mapped) return true;
if (mapped === prop) return prop_map[key];
if (!mapped) return prop;
if (mapped === prop) return prop_map[key] || List.skip;
} else if (node.rest) {
return true;
return prop;
}
var trimmed = prop.value.drop_side_effect_free(compressor);
if (!trimmed) {
if (!(prop.key instanceof AST_Node)) return false;
trimmed = make_node(AST_Number, prop, { value: 0 });
if (trimmed) {
prop.value = trimmed;
return prop;
}
prop.value = trimmed;
return true;
return prop.key instanceof AST_Node ? make_node(AST_ObjectKeyVal, prop, {
key: prop.key,
value: make_node(AST_Number, prop, { value: 0 }),
}) : List.skip;
});
if (value && !node.rest) switch (properties.length) {
case 0: