From c00872c0c0ad09fb0e45e7a10c6ffeff6a7bddef Mon Sep 17 00:00:00 2001
From: Andrew Mitchell <32021055+mitch292@users.noreply.github.com>
Date: Sun, 21 Mar 2021 08:52:28 -0400
Subject: [PATCH] fix(core): don't panic on invalid arguments for
 Deno.core.print (#9834)

---
 core/bindings.rs | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/core/bindings.rs b/core/bindings.rs
index 7fb8aac70b23da..23cd86a179a382 100644
--- a/core/bindings.rs
+++ b/core/bindings.rs
@@ -315,16 +315,19 @@ fn print(
   _rv: v8::ReturnValue,
 ) {
   let arg_len = args.length();
-  assert!((0..=2).contains(&arg_len));
+  if !(0..=2).contains(&arg_len) {
+    return throw_type_error(scope, "Expected a maximum of 2 arguments.");
+  }
 
   let obj = args.get(0);
   let is_err_arg = args.get(1);
 
   let mut is_err = false;
   if arg_len == 2 {
-    let int_val = is_err_arg
-      .integer_value(scope)
-      .expect("Unable to convert to integer");
+    let int_val = match is_err_arg.integer_value(scope) {
+      Some(v) => v,
+      None => return throw_type_error(scope, "Invalid arugment. Argument 2 should indicate wheter or not to print to stderr."),
+    };
     is_err = int_val != 0;
   };
   let tc_scope = &mut v8::TryCatch::new(scope);