fix corner cases in `ie8` (#3472)

fixes #3471

1 files changed, 4 insertions, 1 deletions

diff --git a/lib/compress.js b/lib/compress.js
index 06ba43c0..be9e8dc8 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -3716,6 +3716,7 @@ merge(Compressor.prototype, {
                         if (!def.value) {
                             head.push(def);
                         } else if (compressor.option("functions")
+                            && !compressor.option("ie8")
                             && def.value === def.name.fixed_value()
                             && def.value instanceof AST_Function
                             && !(def.value.name && def.value.name.definition().assignments)
@@ -6183,7 +6184,9 @@ merge(Compressor.prototype, {
                             var fn = node.fixed_value();
                             if (!(fn instanceof AST_Lambda)) return;
                             if (!fn.name) return;
-                            if (fixed.variables.get(fn.name.name) !== fn.name.definition()) return;
+                            var fn_def = fn.name.definition();
+                            if (fn_def.scope !== fn.name.scope) return;
+                            if (fixed.variables.get(fn.name.name) !== fn_def) return;
                             fn.name = fn.name.clone();
                             var value_def = value.variables.get(fn.name.name) || value.def_function(fn.name);
                             node.thedef = value_def;