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-rw-r--r--lib/compress.js2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/compress.js b/lib/compress.js
index 2b28c754..08b0987a 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -3118,7 +3118,7 @@ merge(Compressor.prototype, {
}
}
} else if (stat instanceof AST_ForIn) {
- stat.object = cons_seq(stat.object);
+ if (!is_lexical_definition(stat.init)) stat.object = cons_seq(stat.object);
} else if (stat instanceof AST_If) {
stat.condition = cons_seq(stat.condition);
} else if (stat instanceof AST_Switch) {