On 23/02/16 19:24, Trevor Vaughan wrote:
Hi All,
I'm attempting (once again) to document all of my materials with Puppet
Strings as a collected reference for *all* of my utilized modules.
Right now, this is somewhere around 1058 Puppet and Ruby artifacts.
Unfortunately, at some point, the Strings Gem gives up the ghost and
prints "SystemStackError: stack level too deep'.
It also starts printing errors on files that clearly do not have errors
(lint passes and 'puppet strings' on just the failing file passes).
Not quite sure what's going on here or even how to debug it properly.
Thanks,
Trevor
Out of stack is nasty to solve. It helps running on JRuby as you get
more intelligent backtraces than the "ooops, out of stack" that MRI has
to offer. (The place it says it is out of stack is just unlucky, it can
be one step in a very long cycle).
The first problem is if it needs more stack or not. Bumping it up to
twice the amount or so may make it work. It could also be an infinite
recursion bug in Strings or in Puppet.
Getting a stack trace is thus of value. Armed with the first stack trace
it may be possible to figure out where to instrument the code.
Even it the trace does not show where a cycle starts, it is possible to
figure out what is involved in the cycle. Then artifically inserting a
raise and exception or invoke the debugger at that point i.e. when stack
level is over a certain treshold. Then look at that stack trace to see
the entry into the cycle. Then debug that...
(painful and slow)
- henrik
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Trevor Vaughan
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