From 907313a9cf3fab2fe348bfebac799c921164b87c Mon Sep 17 00:00:00 2001
From: Mehdi Amini <mehdi.amini@apple.com>
Date: Fri, 12 Feb 2016 18:43:10 +0000
Subject: [PATCH] llvm-config: replace assertions with a helpful error message

From: Mehdi Amini <mehdi.amini@apple.com>
llvm-svn: 260700
---
 llvm/tools/llvm-config/llvm-config.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/llvm/tools/llvm-config/llvm-config.cpp b/llvm/tools/llvm-config/llvm-config.cpp
index a867e1b60d82..e5b121006f5a 100644
--- a/llvm/tools/llvm-config/llvm-config.cpp
+++ b/llvm/tools/llvm-config/llvm-config.cpp
@@ -83,6 +83,14 @@ static void VisitComponent(const std::string &Name,
                            const std::string &DirSep) {
   // Lookup the component.
   AvailableComponent *AC = ComponentMap.lookup(Name);
+  if (!AC) {
+    errs() << "Can't find component: '" << Name << "' in the map. Available components are: ";
+    for (const auto &Component : ComponentMap) {
+      errs() << "'" << Component.first() << "' ";
+    }
+    errs() << "\n";
+    report_fatal_error("abort");
+  }
   assert(AC && "Invalid component name!");
 
   // Add to the visited table.