From: seoanezonjic@... Date: 2019-11-18T11:39:03+00:00 Subject: [ruby-core:95875] [Ruby master Bug#16352] Marshal limit of >= 2 GiB Issue #16352 has been reported by seoanezonjic (Pedro Seoane). ---------------------------------------- Bug #16352: Marshal limit of >= 2 GiB https://bugs.ruby-lang.org/issues/16352 * Author: seoanezonjic (Pedro Seoane) * Status: Open * Priority: Normal * Assignee: * Target version: * ruby -v: ruby 2.7.0dev (2019-11-12T12:03:22Z master 3816622fbe) [x86_64-linux] * Backport: 2.5: UNKNOWN, 2.6: UNKNOWN ---------------------------------------- Hi Using a gem to handle matrix operations called Numo-array I found the following error when save large matrix: in `dump': long too big to dump (TypeError) Github thread: https://github.com/ruby-numo/numo-narray/issues/144 Digging with the authors, we found the following code that reproduces the error: ruby -e 'Marshal.dump(" "*2**31)' Executed in : ruby 2.7.0dev (2019-11-12T12:03:22Z master 3816622fbe) [x86_64-linux] The marshal library has a limit that is checked with the SIZEOF_LONG constant. This check is performed in this line https://github.com/ruby/ruby/blob/e7ea6e078fecb70fbc91b04878b69f696749afac/marshal.c#L301 to 321 of the Marshal.c file. I don't understand the motivation of this limit and has a great impact in libraries that need to serialize large objects as numeric matrix. In this case, the limit of >= 2 GiB it's reached easily and it blocks the ruby development in scientifical projects as cited. I found other bug related: #1560, but the Marshal problem itself was not addressed in this case. Thank you in advance PEdro Seoane -- https://bugs.ruby-lang.org/ Unsubscribe: