Feature #11347: Errors with cause not reported properly to console

• Status: Open
• Assignee: -
• Target version: -

[akostadinov (Aleksandar Kostadinov)]

Hello, errors with cause are an important and very useful feature for debugging. It seems though default reporting is not showing the cause and nested causes to user. Here's a test file:

raise "GAHGAH" rescue raise "error with cause" rescue e=$!

puts "Error: #{e}"
puts "Cause: #{e.cause}"

raise e

As you can see, the cause of the error is not printed in any way to the console when error is raised:

$ ruby /tmp/test.rb 
Error: error with cause
Cause: GAHGAH
/tmp/test.rb:1:in `rescue in <main>': error with cause (RuntimeError)
	from /tmp/test.rb:1:in `<main>

[nobu (Nobuyoshi Nakada)]

• Is duplicate of Feature #9918: Exception#cause should be shown in output and #inspect added

[nobu (Nobuyoshi Nakada)]

• Tracker changed from Bug to Feature
• Description updated (diff)

[akostadinov (Aleksandar Kostadinov)]

I rather think it is actually a bug because it hides very important information from the user. It's like showing your error cut in half or on more pieces. It's just confusing to use causes this way. So I call it a bug as the initial feature implementation is somehow broken.