Bug #18958: Kernel#sprintf doesn't apply format sequence in some encodings

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: 3.0.3
• Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN

[andrykonchin (Andrew Konchin)]

I've noticed that sprintf does nothing (at least for %f) when format string is in the following encodings:

• UTF-16
• UTF-16BE
• UTF-16LE
• UTF-32
• UTF-32BE
• UTF-32LE
• UCS-2BE
• UCS-4BE
• UCS-4LE
• IBM037
• ebcdic-cp-us

Example:

format = "%10.4f".encode("UTF-32")
sprintf(format, 12.34)
# => "\uFEFF%10.4f"

[matz (Yukihiro Matsumoto)]

I agree with raising exception when the format string is not ASCII compatible.

Matz.

[mame (Yusuke Endoh)]

@naruse (Yui NARUSE), @nobu (Nobuyoshi Nakada), and @matz (Yukihiro Matsumoto) agreed that it should raise an exception if the format string is not ASCII-compatible.

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed

Applied in changeset git|1a2f99275be28fb0e8ff4cfc0165966e99898d70.

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[Bug #18958] format string must be ASCII compatible