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Created attachment 994682 [details]
Input file that triggers crash

Description of problem:
"dot" exists with a segmentation fault with certain configs. Example will be attached.


Version-Release number of selected component (if applicable):
2.26.0-10.el6

How reproducible:
Every time.

Steps to Reproduce:
1. dot svek.dot


Actual results:
Segmentation fault (core dumped)


Expected results:
Diagram generated...

Additional info:
The crash does not occur with graphviz 2.38 built from source code, i.e. switching to a newer upstream release would help.

Created attachment 994685 [details]
Updated spec file

I've also built an rpm for a newer version, using an edited version of the spec from the source rpm. This spec file is attached here.

Created attachment 1196451 [details]
patch

The attached patch (taken from [1]) should fix the problem.

[1] https://github.com/ellson/graphviz/commit/74253c6bfb80dc47183fa5f4e73374008cc56d98

Red Hat Enterprise Linux 6 transitioned to the Production 3 Phase on May 10, 2017.  During the Production 3 Phase, Critical impact Security Advisories (RHSAs) and selected Urgent Priority Bug Fix Advisories (RHBAs) may be released as they become available.

The official life cycle policy can be reviewed here:
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This issue does not appear to meet the inclusion criteria for the Production Phase 3 and will be marked as CLOSED/WONTFIX. If this remains a critical requirement, please contact Red Hat Customer Support to request a re-evaluation of the issue, citing a clear business justification.  Red Hat Customer Support can be contacted via the Red Hat Customer Portal at the following URL:

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