collapse within unary expressions (#2910)

1 files changed, 3 insertions, 0 deletions

diff --git a/lib/compress.js b/lib/compress.js
index ad691f7a..a161b457 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -1260,6 +1260,8 @@ merge(Compressor.prototype, {
                 } else if (expr instanceof AST_Unary) {
                     if (expr.operator == "++" || expr.operator == "--") {
                         candidates.push(hit_stack.slice());
+                    } else {
+                        extract_candidates(expr.expression);
                     }
                 } else if (expr instanceof AST_VarDef) {
                     if (expr.value) {
@@ -1314,6 +1316,7 @@ merge(Compressor.prototype, {
                     return find_stop(parent, level + 1, true);
                 }
                 if (parent instanceof AST_Switch) return node;
+                if (parent instanceof AST_Unary) return node;
                 if (parent instanceof AST_VarDef) return node;
                 return null;
             }