[ruby-core:69976] [Ruby trunk - Bug #11088] On Exception too expensive inspect is called on recursive object graph with 3000 elements in it, swallows memory and ultimately doesn't deliver exception

Issue #11088 has been updated by J端rgen Bickert.

Subject changed from Infinite loop on calling missing/overwritten methods of restored marshaled objects to On Exception too expensive inspect is called on recursive object graph with 3000 elements in it, swallows memory and ultimately doesn't deliver exception
Description updated

After your input and directing me to inspect, I did some more testing and found that marshal has absolutely nothing to do with this problem. Writing custom inspect methods fixes the problem. Another question still remains for why is inspect called on the errored object, development stagnated for me because my program has a moderately sized object graph with recursive dependencies. I couldn't get any error messages at all anymore! Imagine you mistyped a method but your process will hang in inspect instead of finally raising NoMethodError exception to the toplevel.

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Bug #11088: On Exception too expensive inspect is called on recursive object graph with 3000 elements in it, swallows memory and ultimately doesn't deliver exception
https://bugs.ruby-lang.org/issues/11088#change-53409

* Author: J端rgen Bickert
* Status: Rejected
* Priority: Normal
* Assignee: 
* ruby -v: ruby 2.2.2p95 (2015-04-13 revision 50295) [x86_64-linux]
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN
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I have tested with simple cases where the dumped structure is not recursive and it works fine. So I attached a non-working dump which will when called with inspect or a non-existing method run off in an infinite loop.

When you run "ruby bug_hunt.rb" it will get stuck and you have to abort(CTRL-C) and only then will it print an error message and finish.

---Files--------------------------------
bug_hunt.rb (336 Bytes)
ruby_object.dump (561 KB)
11088_test.rb (305 Bytes)
simple-inspect.txt (1.19 MB)
simple-inspect-stats.txt (90.7 KB)
bug_hunt_benchmark.rb (1.42 KB)
bug_hunt_simple.rb (1.09 KB)


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