From f87caac9d89061ce005c56384e08fd94ca80d94c Mon Sep 17 00:00:00 2001 From: "Alex Lam S.L" Date: Tue, 14 May 2019 19:12:00 +0800 Subject: fix corner case in `hoist_props` (#3412) fixes #3411 --- lib/compress.js | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) (limited to 'lib') diff --git a/lib/compress.js b/lib/compress.js index 71f2eae1..3bb6cb24 100644 --- a/lib/compress.js +++ b/lib/compress.js @@ -519,7 +519,7 @@ merge(Compressor.prototype, { if (parent instanceof AST_Call && node === parent.expression) return; if (parent instanceof AST_Sequence && node !== parent.tail_node()) return; if (parent instanceof AST_SimpleStatement) return; - if (parent instanceof AST_Unary) return; + if (parent instanceof AST_Unary && !unary_side_effects[parent.operator]) return; d.direct_access = true; } @@ -4067,6 +4067,16 @@ merge(Compressor.prototype, { })); return make_sequence(node, assignments); } + if (node instanceof AST_Unary + && !unary_side_effects[node.operator] + && node.expression instanceof AST_SymbolRef + && node.expression.definition().id in defs_by_id) { + node = node.clone(); + node.expression = make_node(AST_Object, node, { + properties: [] + }); + return node; + } if (node instanceof AST_VarDef && can_hoist(node.name, node.value, 0)) { descend(node, this); var defs = new Dictionary(); -- cgit v1.2.3