From: timhwang21@... Date: 2020-09-30T13:14:37+00:00 Subject: [ruby-core:100236] [Ruby master Bug#17205] Misleading error message when comparing NaN with numbers in array Issue #17205 has been reported by timhwang21 (Tim Hwang). ---------------------------------------- Bug #17205: Misleading error message when comparing NaN with numbers in array https://bugs.ruby-lang.org/issues/17205 * Author: timhwang21 (Tim Hwang) * Status: Open * Priority: Normal * ruby -v: ruby 3.0.0dev (2020-09-30T11:43:19Z master 65e8a29389) [x86_64-darwin19] * Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN ---------------------------------------- The closest issue I could find is this: https://bugs.ruby-lang.org/issues/10424 There is quite a lot of inconsistency when dealing with arrays containing `NaN`, dependent on 1) if comparing against an integer or a float, 2) order of comparison. The one that stands out to me as "least correct" is the last one (`[Float::NAN, 1.0].min`) which raises `TypeError (no implicit conversion from nil to integer)`. ``` ruby # .sort [1, Float::NAN].sort # Most sensible error message # ArgumentError (comparison of Integer with NaN failed) [1.0, Float::NAN].sort # Somewhat sensible error message # TypeError (no implicit conversion from nil to integer) [Float::NAN, 1].sort # Somewhat sensible error message # TypeError (no implicit conversion from nil to integer) [Float::NAN, 1.0].sort # Somewhat sensible error message # TypeError (no implicit conversion from nil to integer) # .min [1, Float::NAN].min # Most sensible error message # ArgumentError (comparison of Float with 1 failed) [1.0, Float::NAN].min # Somewhat sensible error message # TypeError (no implicit conversion from nil to integer) [Float::NAN, 1].min # Most sensible error message # ArgumentError (comparison of Integer with NaN failed) [Float::NAN, 1.0].min # Very misleading error message # TypeError (no implicit conversion from nil to integer) ``` -- https://bugs.ruby-lang.org/ Unsubscribe: