Bug #20992: `eval(ascii_encoded_code)` raises EncodingError when multibyte local variable exists

• Status: Closed
• Assignee: prism
• Target version: -
• ruby -v: ruby 3.5.0dev (2024-12-28T09:40:37Z master e4ec2128ae) +YJIT +MN +PRISM [arm64-darwin22]
• Backport: 3.1: DONTNEED, 3.2: DONTNEED, 3.3: DONTNEED, 3.4: REQUIRED

[tompng (tomoya ishida)]

#coding: utf-8
α=1
eval '1+2'.encode('ascii')

$ ruby file.rb
file.rb:3:in 'Kernel#eval': invalid symbol in encoding US-ASCII :"\xCE\xB1" (EncodingError)
	from file.rb:3:in '<main>'

Running the file below with LANG=C ruby file.rb will make IRB unresponsive

#coding: utf-8
α=1
binding.irb

$ LANG=C ruby file.rb
From: file.rb @ line 3 :

    1: #coding: utf-8
    2: α=1
 => 3: binding.irb
irb(main):001> 1
<internal:kernel>:168:in 'Kernel#loop': invalid symbol in encoding US-ASCII :"\xCE\xB1" (EncodingError)
	from <internal:prelude>:5:in 'Binding#irb'
	from file.rb:3:in '<main>'
irb(main):002> 

[nobu (Nobuyoshi Nakada)]

• Assignee set to prism
• Backport changed from 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN to 3.1: DONTNEED, 3.2: DONTNEED, 3.3: DONTNEED, 3.4: REQUIRED

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed

Applied in changeset git|5fec9308320e8b377681ef19b0cd46d53f94e8ac.

---

[Bug #20992] Test for local variable name encodings

[nobu (Nobuyoshi Nakada)]

• Status changed from Closed to Open

[kddnewton (Kevin Newton)]

• Status changed from Open to Closed

Applied in changeset git|1a06bee027d5c5b65ed0aaee76ee0040554d4efd.

---

Do not intern invalid symbols in eval parse

When the inner code cannot represent the name of the locals in the
outer code, do not bother putting them into the constant pool as
they will not be referenced.

Fixes [Bug #20992]

Co-authored-by: Nobuyoshi Nakada [e-mail]