[#103135] [Ruby master Feature#17768] Proposal: Downward assignments — mame@...

Issue #17768 has been reported by mame (Yusuke Endoh).

10 messages 2021/04/01

[#103162] [Ruby master Feature#17773] Alias `Numeric#zero?` and `Float#zero?` as `Numeric#empty?` and `Float#empty?` — sawadatsuyoshi@...

Issue #17773 has been reported by sawa (Tsuyoshi Sawada).

9 messages 2021/04/02

[#103241] [Ruby master Bug#17777] 2.6.7 fails to build on macOS: implicit declaration of function 'rb_native_mutex_destroy' is invalid in C99 — eregontp@...

Issue #17777 has been reported by Eregon (Benoit Daloze).

17 messages 2021/04/05

[#103280] [Ruby master Bug#17781] Resolv::DNS RequestID table allocations are never freed, causing DNS lookups to eventually hang — supermathie@...

SXNzdWUgIzE3NzgxIGhhcyBiZWVuIHJlcG9ydGVkIGJ5IHN1cGVybWF0aGllIChNaWNoYWVsIEJy

9 messages 2021/04/07

[#103305] [Ruby master Feature#17785] Allow named parameters to be keywords — marcandre-ruby-core@...

Issue #17785 has been reported by marcandre (Marc-Andre Lafortune).

21 messages 2021/04/08

[#103310] [Ruby master Feature#17786] Proposal: new "ends" keyword — jzakiya@...

Issue #17786 has been reported by jzakiya (Jabari Zakiya).

13 messages 2021/04/08

[#103317] [Ruby master Bug#17787] Four AIX build issues with xlc compiler and ruby-3.0.1 — lamont@...

Issue #17787 has been reported by lamont (Lamont Granquist).

9 messages 2021/04/08

[#103342] [Ruby master Feature#17790] Have a way to clear a String without resetting its capacity — jean.boussier@...

Issue #17790 has been reported by byroot (Jean Boussier).

14 messages 2021/04/09

[#103386] [Ruby master Bug#17793] `shorten-64-to-32` error for 32-bit Android due to `struct stat` definition — xtkoba+ruby@...

Issue #17793 has been reported by xtkoba (Tee KOBAYASHI).

8 messages 2021/04/11

[#103400] [Ruby master Feature#17795] `before_fork` and `after_fork` callback API — jean.boussier@...

Issue #17795 has been reported by byroot (Jean Boussier).

42 messages 2021/04/12

[#103434] [Ruby master Bug#17799] Seg fault in rb_class_clear_method_cache — stanhu@...

Issue #17799 has been reported by stanhu (Stan Hu).

14 messages 2021/04/13

[#103481] [Ruby master Feature#17808] Feature Request: JS like splat of Object properties as named method parameters — brad.krane@...

Issue #17808 has been reported by Lithium (Brad Krane).

8 messages 2021/04/16

[#103556] [Ruby master Bug#17820] `Errno::EINVAL` from `Process.kill` with available signal on Windows — alex.wayfer@...

SXNzdWUgIzE3ODIwIGhhcyBiZWVuIHJlcG9ydGVkIGJ5IEFsZXhXYXlmZXIgKEFsZXhhbmRlciBQ

9 messages 2021/04/22

[#103591] [Ruby master Bug#17827] Monitor is not fiber safe — samuel@...

Issue #17827 has been reported by ioquatix (Samuel Williams).

11 messages 2021/04/25

[#103593] [Ruby master Misc#17828] Deprecate use of master and slave — yyoshida.at.work@...

Issue #17828 has been reported by yyoshida.at.work@gmail.com (Yasuhiro Yoshida).

10 messages 2021/04/26

[#103596] [Ruby master Feature#17830] Add Integer#previous and Integer#prev — rafasoaresms@...

Issue #17830 has been reported by rafasoares (Rafael Soares).

9 messages 2021/04/26

[#103631] [Ruby master Feature#17837] Add support for Regexp timeouts — sam.saffron@...

Issue #17837 has been reported by sam.saffron (Sam Saffron).

45 messages 2021/04/27

[ruby-core:103168] [Ruby master Bug#17731] Integer downflow with inject/reduce

From: naruse@...
Date: 2021-04-02 07:01:17 UTC
List: ruby-core #103168
Issue #17731 has been updated by naruse (Yui NARUSE).

Backport changed from 2.5: REQUIRED, 2.6: REQUIRED, 2.7: DONE, 3.0: REQUIRED to 2.5: REQUIRED, 2.6: REQUIRED, 2.7: DONE, 3.0: DONE

ruby_3_0 855401da495117fcf5d258fe43b71010abc43d9a merged revision(s) a85ed626f18d1014d09fb37eb0a703976c3d2b53.

----------------------------------------
Bug #17731: Integer downflow with inject/reduce
https://bugs.ruby-lang.org/issues/17731#change-91241

* Author: gaojun (Jun Gao)
* Status: Closed
* Priority: Normal
* Assignee: marcandre (Marc-Andre Lafortune)
* ruby -v: ruby 3.0.0p0 (2020-12-25 revision 95aff21468) [x86_64-linux]
* Backport: 2.5: REQUIRED, 2.6: REQUIRED, 2.7: DONE, 3.0: DONE
----------------------------------------
Test case:
[-2305843009213693953,-2305843009213693953,-2305843009213693953].inject(:+)
or
([-2**61-1] * 3).inject(:+)

Expected Result:
-6917529027641081859

Actual Result:
11529215046068469757

Some clues:
* Downflow seems not happen if there are only two elements in Array
* The sample above works fine in https://try.ruby-lang.org/
* [-2305843009213693953,-2305843009213693953,-2305843009213693953].sum  can get the correct result
* ([-2**61] * 3).inject(:+) can get the correct result

Affected Versions:
* ruby 3.0.0p0 (2020-12-25 revision 95aff21468) [x86_64-linux]
* ruby 2.7.2p137 (2020-10-01 revision 5445e04352) [x86_64-linux]
* ruby 2.6.6p146 (2020-03-31 revision 67876) [x86_64-linux]




-- 
https://bugs.ruby-lang.org/

Unsubscribe: <mailto:ruby-core-request@ruby-lang.org?subject=unsubscribe>
<http://lists.ruby-lang.org/cgi-bin/mailman/options/ruby-core>

In This Thread

Prev Next