Issue #13744 has been updated by nagachika (Tomoyuki Chikanaga).

Backport changed from 2.2: REQUIRED, 2.3: DONE, 2.4: REQUIRED to 2.2: REQUIRED, 2.3: DONE, 2.4: DONE

ruby_2_4 r59809 merged revision(s) 59322,59325.

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Bug #13744: Spawn doesn't work with options of symbol keys generated dynamically
https://bugs.ruby-lang.org/issues/13744#change-66571

* Author: satoryu (Tatsuya Sato)
* Status: Closed
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: ruby 2.5.0dev (2017-07-13 trunk 59321) [x86_64-darwin16]
* Backport: 2.2: REQUIRED, 2.3: DONE, 2.4: DONE
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spawn works when giving options whose key is symbol literal: 

~~~
$ ruby -e 'spawn("ls", :rlimit_cpu => 100)'
~~~

But spawn fails when generating symbol from a String: 

~~~
$ ruby -e 'spawn("ls", "rlimit_cpu".to_sym => 100)'
-e:1:in `spawn': wrong exec option symbol: rlimit_cpu (ArgumentError)
        from -e:1:in `<main>'
~~~




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