[#87847] undefined symbol: mjit_init_p — Leam Hall <leamhall@...>

I pulled Ruby trunk on 3 Jul and am now getting errors similar to the

10 messages 2018/07/07

[#88088] [Ruby trunk Misc#14937] [PATCH] thread_pthread: lazy-spawn timer-thread only on contention — normalperson@...

Issue #14937 has been reported by normalperson (Eric Wong).

9 messages 2018/07/24

[ruby-core:87906] [Ruby trunk Bug#12548] Rounding modes inconsistency between round versus sprintf

From: kieran.mccusker@...
Date: 2018-07-11 12:33:20 UTC
List: ruby-core #87906
Issue #12548 has been updated by unclekiki (Kieran McCusker).


It is a real bug, it's just that, as I have said before, the "fix" took the wrong direction. sprintf should behave like round (as it does, or at least did, in jruby with no apparent issues). Round even is a very specialised use case.

Imagine you take the height of 100 school children to the nearest half centimetre and then want to output frequencies using sprintf to the nearest whole centimetre. Do you really want the frequencies to spaced like (117), (117.5, 118, 118.5), (119), (119.5, 120, 120.5)

The real solution is to make sprintf perform like round.

As Matz said 2 years ago "it should be consistent. Will be fixed."

----------------------------------------
Bug #12548: Rounding modes inconsistency between round versus sprintf
https://bugs.ruby-lang.org/issues/12548#change-72915

* Author: unclekiki (Kieran McCusker)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: 2.4.0
* Backport: 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN
----------------------------------------
Hi

I've found this possible bug with `sprintf` in our production code, but it
seems very odd that no one has reported it so I'm doubting myself.

I've tested a few versions (CRuby 2.3.1 and 2.1.9) and it was present in
both.

To reproduce in irb:

```ruby
sprintf('%1.0f', 12.5)
```

Expected result 13 actual 12

In fact if you look at the number sequence 0.5 -> 99.5 you find the even
half will all round down and the odd half round up. 12.5.round produces the correct result (13)

If you do the same in jruby 2.2.1 you get the expected result of 13.

Many thanks

Kieran


---Files--------------------------------
round_even.patch (4.43 KB)


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