Bug #14598: [2.6.0 Preview1] Flood of error message occurs when throwing an error including "\n" in its message.

• Status: Closed
• Assignee: -
• Target version: -
• Backport: 2.3: UNKNOWN, 2.4: UNKNOWN, 2.5: UNKNOWN

[minoritea (Minori Tokuda)]

2.6.0-preview1にて表題の現象にぶつかったため報告致します。

バージョン:
ruby 2.6.0preview1 (2018-02-24 trunk 62554) [x86_64-darwin17]

環境:
MacOS 10.13.3
Macbook Pro(Core i7, 16GB RAM)

再現方法:
ruby -e 'fail "\n"'

現象:
fail/raiseで文字列を飛ばしたとき、"\n"が含まれていると、
エラーメッセージの出力で大量のログが流されてしまいます。

以下、上から三行目まで切り取ったものです。

"""
Traceback (most recent call last):
-e:1:in <main>': (RuntimeError) a?$-p ??N??{T?(?
"""

出力先をリダイレクトするとエラーメッセージは正しく表示されるので、
端末出力のみで起きるのではないかと思います。

ちなみに、2.5.0で試したところ再現しませんでした。

[minoritea (Minori Tokuda)]

• Subject changed from [2.6.0 Preview1] fail/raiseで"\n"を飛ばしたときにエラーメッセージであふれてしまう to [2.6.0 Preview1] Flood of error message occurs when throwing an error including "\n" in its message.

Sorry to have sent the japanese report. I had to send it to ruby-dev.

[minoritea (Minori Tokuda)]

I tried to translate the original text.

---

Version:
ruby 2.6.0preview1 (2018-02-24 trunk 62554) [x86_64-darwin17]

Environment:
MacOS 10.13.3
Macbook Pro(Core i7, 16GB RAM)

How to reproduce:
ruby -e 'fail "\n"'

On calling fail/raise with a message string which includes "\n", the output floods in screen.

The three lines from the top are below:

"""
Traceback (most recent call last):
-e:1:in ': (RuntimeError)
a?$-p ??N??{T?(?
"""

If I redirected the output to another process or file, the error is displayed correctly.
Therefore, this event might cause in terminals only.

By the way, I tried it at 2.5.0 and it did not reproduce.

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed

Applied in changeset trunk|r62728.

---

eval_error.c: fix underflow

• eval_error.c (print_errinfo): get rid of negative string length.
  [ruby-core:86086] [Bug #14598]