From e062dc8ddf661d560d8778a0e408cb5e78360fd8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?F=C3=A1bio=20Santos?= <fabiosantosart@gmail.com>
Date: Fri, 17 Feb 2023 13:05:38 +0000
Subject: [PATCH] Do not mark BigInt `is_number`. Closes #1315

---
 lib/compress/inference.js  |  3 ++-
 test/compress/comparing.js | 13 +++++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/lib/compress/inference.js b/lib/compress/inference.js
index 91067b7d6..29434a66b 100644
--- a/lib/compress/inference.js
+++ b/lib/compress/inference.js
@@ -45,6 +45,7 @@ import {
   AST_Array,
   AST_Arrow,
   AST_Assign,
+  AST_BigInt,
   AST_Binary,
   AST_Block,
   AST_BlockStatement,
@@ -171,7 +172,7 @@ export const unary_side_effects = makePredicate("delete ++ --");
     def_is_number(AST_Number, return_true);
     const unary = makePredicate("+ - ~ ++ --");
     def_is_number(AST_Unary, function() {
-        return unary.has(this.operator);
+        return unary.has(this.operator) && !(this.expression instanceof AST_BigInt);
     });
     const numeric_ops = makePredicate("- * / % & | ^ << >> >>>");
     def_is_number(AST_Binary, function(compressor) {
diff --git a/test/compress/comparing.js b/test/compress/comparing.js
index d56445e0e..dfc3d813f 100644
--- a/test/compress/comparing.js
+++ b/test/compress/comparing.js
@@ -315,3 +315,16 @@ issue_2857_6: {
     }
     expect_stdout: "true"
 }
+
+bigint_vs_number: {
+    options = {
+        comparisons: true,
+    }
+    input: {
+        if (-1 !== -1n) console.log("PASS");
+    }
+    expect: {
+        if (-1 !== -1n) console.log("PASS");
+    }
+    expect_stdout: "PASS"
+}