diff options
| -rw-r--r-- | lib/compress.js | 12 | ||||
| -rw-r--r-- | test/compress/optional-chains.js | 22 |
2 files changed, 29 insertions, 5 deletions
diff --git a/lib/compress.js b/lib/compress.js index 1be74033..a418925a 100644 --- a/lib/compress.js +++ b/lib/compress.js @@ -7861,11 +7861,13 @@ merge(Compressor.prototype, { var prop = this.property; if (expr.may_throw_on_access(compressor)) { if (!this.optional) return this; - prop = prop.drop_side_effect_free(compressor); - if (!prop) return expr.drop_side_effect_free(compressor, first_in_statement); - var node = this.clone(); - node.property = prop; - return node; + if (prop.has_side_effects(compressor)) { + prop = prop.drop_side_effect_free(compressor); + if (!prop) return expr.drop_side_effect_free(compressor, first_in_statement); + var node = this.clone(); + node.property = prop; + return node; + } } expr = expr.drop_side_effect_free(compressor, first_in_statement); if (!expr) return prop.drop_side_effect_free(compressor, first_in_statement); diff --git a/test/compress/optional-chains.js b/test/compress/optional-chains.js index ced841d2..be82b64e 100644 --- a/test/compress/optional-chains.js +++ b/test/compress/optional-chains.js @@ -305,3 +305,25 @@ issue_4947_2: { expect_stdout: "PASS" node_version: ">=14" } + +issue_5039: { + options = { + ie8: true, + side_effects: true, + toplevel: true, + unused: true, + } + input: { + var a = a?.[function f() { + f; + a; + }]; + console.log("PASS"); + } + expect: { + (function f() {}); + console.log("PASS"); + } + expect_stdout: "PASS" + node_version: ">=14" +} |