Bug #20696: `IO.read` ignores `err:` option

• Status: Open
• Assignee: -
• Target version: -
• Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN

[nobu (Nobuyoshi Nakada)]

I expected the following code captures the error message, but err: option is ignored.

$ ruby -e 'p IO.read("|ruby -e raise", err: %i[child out])'
-e:1:in '<main>': unhandled exception
""

https://github.com/ruby/ruby/pull/11446

[nobu (Nobuyoshi Nakada)]

• Description updated (diff)