From 70eee9b0df31c043bbc548a78e754030147dbb6e Mon Sep 17 00:00:00 2001
From: Martok <martok@martoks-place.de>
Date: Fri, 1 Jul 2022 12:27:03 +0200
Subject: [PATCH] Issue #1952 - m-c 1380962/1: Merge append calls when
 assembling the source string for native functions

---
 js/src/jsfun.cpp | 16 ++++------------
 1 file changed, 4 insertions(+), 12 deletions(-)

diff --git a/js/src/jsfun.cpp b/js/src/jsfun.cpp
index c409a0f29b..e71a495028 100644
--- a/js/src/jsfun.cpp
+++ b/js/src/jsfun.cpp
@@ -990,7 +990,7 @@ js::FunctionToString(JSContext* cx, HandleFunction fun, bool prettyPrint)
     // If we're not in pretty mode, put parentheses around lambda functions
     // so that eval returns lambda, not function statement.
     if (haveSource && !prettyPrint && funIsNonArrowLambda) {
-        if (!out.append("("))
+        if (!out.append('('))
             return nullptr;
     }
 
@@ -1038,7 +1038,7 @@ js::FunctionToString(JSContext* cx, HandleFunction fun, bool prettyPrint)
             return nullptr;
 
         if (!prettyPrint && funIsNonArrowLambda) {
-            if (!out.append(")"))
+            if (!out.append(')'))
                 return nullptr;
         }
     } else if (fun->isInterpreted() &&
@@ -1056,22 +1056,14 @@ js::FunctionToString(JSContext* cx, HandleFunction fun, bool prettyPrint)
                       !script->scriptSource()->sourceRetrievable() ||
                       fun->compartment()->behaviors().discardSource());
         if (!AppendPrelude() ||
-            !out.append("() {\n    ") ||
-            !out.append("[sourceless code]") ||
-            !out.append("\n}"))
+            !out.append("() {\n    [sourceless code]\n}"))
         {
             return nullptr;
         }
     } else {
 
         if (!AppendPrelude() ||
-            !out.append("() {\n    "))
-            return nullptr;
-
-        if (!out.append("[native code]"))
-            return nullptr;
-
-        if (!out.append("\n}"))
+            !out.append("() {\n    [native code]\n}"))
             return nullptr;
     }
     return out.finishString();