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-rw-r--r--lib/compress.js3
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/compress.js b/lib/compress.js
index b35fc6a5..a0e018e3 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -9836,7 +9836,8 @@ merge(Compressor.prototype, {
}
} while (scope = scope.parent_scope);
}
- } else if (fixed.name && fixed.name.name == "await" && is_async(fixed)) {
+ } else if (fixed.name && (fixed.name.name == "await" && is_async(fixed)
+ || fixed.name.name == "yield" && is_generator(fixed))) {
single_use = false;
}
if (single_use) fixed.parent_scope = self.scope;