Bug #21018: Show invalid command line option more properly

• Status: Closed
• Assignee: -
• Target version: -
• Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN

[nobu (Nobuyoshi Nakada)]

Currently the invalid command line option character is printed as-is.

This makes the error message confusing sometimes.

$ ruby -$'\rx'
  (-h will show valid options) (RuntimeError)

$ ruby -$'\U1f608'
ruby: invalid option -?  (-h will show valid options) (RuntimeError)

These are actually:

$ ruby -$'\rx' |& cat -e
ruby: invalid option -^M  (-h will show valid options) (RuntimeError)$

$ ruby -$'\U1f608' |& cat -e
ruby: invalid option -M-p  (-h will show valid options) (RuntimeError)$

I think control characters and multibyte characters should be printed properly.

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed

Applied in changeset git|dfe6b7c02efa3bc2f5426eb64107ac0ac45a66a4.

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[Bug #21018] Show invalid command line option more properly