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Remove bignum check from save_history #1018

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Oct 13, 2024
Merged

Remove bignum check from save_history #1018

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15 changes: 3 additions & 12 deletions lib/irb/history.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -5,10 +5,7 @@ module History
class << self
# Integer representation of <code>IRB.conf[:HISTORY_FILE]</code>.
def save_history
num = IRB.conf[:SAVE_HISTORY].to_i
# Bignums cause RangeErrors when slicing arrays.
# Treat such values as 'infinite'.
(num > save_history_max) ? -1 : num
IRB.conf[:SAVE_HISTORY].to_i
end

def save_history?
Expand All @@ -27,13 +24,6 @@ def history_file
IRB.rc_file("_history")
end
end

private

def save_history_max
# Max fixnum (32-bit) that can be used without getting RangeError.
2**30 - 1
end
end
end

Expand Down Expand Up @@ -90,7 +80,8 @@ def save_history
hist = history.map { |l| l.scrub.split("\n").join("\\\n") }

unless append_history || History.infinite?
hist = hist.last(History.save_history)
# Check size before slicing because array.last(huge_number) raises RangeError.
hist = hist.last(History.save_history) if hist.size > History.save_history
end

f.puts(hist)
Expand Down
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