Fiber#run: use STDERR again, and give better error message

crystal-lang · Jul 5, 2016 · 993bda1 · 993bda1
1 parent 104c9b9
commit 993bda1
Showing 1 changed file with 6 additions and 5 deletions.
diff --git a/src/fiber.cr b/src/fiber.cr
@@ -96,12 +96,13 @@ class Fiber
   def run
     @proc.call
   rescue ex
-    # Don't use STDERR here because we are at a lower level than that
-    msg = String.build do |io|
-      io.puts "Unhandled exception:"
-      ex.inspect_with_backtrace io
+    if name = @name
+      STDERR.puts "Unhandled exception in spawn(name: #{name}):"
+    else
+      STDERR.puts "Unhandled exception in spawn:"
     end
-    LibC.write(2, msg, msg.bytesize)
+    ex.inspect_with_backtrace STDERR
+    STDERR.flush
   ensure
     @@stack_pool << @stack