fix

Author: Austaras

crates/swc_ecma_minifier/src/compress/optimize/mod.rs

@@ -31,7 +31,7 @@ use crate::{
     maybe_par,
     mode::Mode,
     option::{CompressOptions, MangleOptions},
-    program_data::ProgramData,
+    program_data::{ProgramData, VarUsageInfo},
     util::{
         contains_eval, contains_leaping_continue_with_label, make_number, ExprOptExt, ModuleItemExt,
     },
@@ -323,7 +323,7 @@ impl From<&Function> for FnMetadata {
 
 impl Optimizer<'_> {
     fn may_remove_ident(&self, id: &Ident) -> bool {
-        if self.ctx.is_exported {
+        if let Some(VarUsageInfo { exported: true, .. }) = self.data.vars.get(&id.clone().to_id()) {
             return false;
         }
 

crates/swc_ecma_minifier/src/compress/optimize/sequences.rs

@@ -1525,9 +1525,8 @@ impl Optimizer<'_> {
         // Respect top_retain
         if let Some(a_id) = a.id() {
             if a_id.0 == "arguments"
-                || (self.ctx.in_top_level()
-                    && a_id.1 == self.marks.top_level_ctxt
-                    && self.options.top_retain.contains(&a_id.0))
+                || (matches!(a, Mergable::Var(_) | Mergable::FnDecl(_))
+                    && !self.may_remove_ident(&Ident::from(a_id)))
             {
                 return Ok(false);
             }