Backport #8253: Can't eval very long strings (SystemStackError)

• Status: Rejected
• Assignee: usa (Usaku NAKAMURA)

[hammady (Hossam Hammady)]

I have a very long string which is the output from a Solr server, RSolr gem fails to eval the response as a Ruby object because it is too long (> 640K). I have filed a detailed bug description here:
https://github.com/mwmitchell/rsolr/issues/61
The problematic response can be found here:
http://da.qcri.org/solr-response-46-70000.txt
It boiled down that Kernel.eval fails because the string is too long for the allocated stack.
File: vm.c
Function: vm_set_eval_stack
MACRO: CHECK_STACK_OVERFLOW

Is it just a limitation in the VM or the stack can have a dynamically larger size?

[nobu (Nobuyoshi Nakada)]

• Tracker changed from Bug to Backport
• Project changed from Ruby master to Backport193
• Category deleted (core)
• Status changed from Open to Assigned
• Assignee set to usa (Usaku NAKAMURA)

This issue is fixed by r35306, with some fix-ups.

[usa (Usaku NAKAMURA)]

• Status changed from Assigned to Rejected

Hmm, r35306 is a too big change for ruby_1_9_3.
So I don't fix it and declare that this is a limitation of ruby 1.9.3.

[hammady (Hossam Hammady)]

I confirm that it is fixed in ruby2, just tried it. Thank you guys.