[cmake-developers] [CMake 0016015]: 'cmake -U*' causes SIGABRT in cmGlobalGenerator::EnableLanguage()

[Mantis Bug Tracker]

The following issue has been SUBMITTED. 
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http://public.kitware.com/Bug/view.php?id=16015 
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Reported By:                Julian Schmidt
Assigned To:                
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Project:                    CMake
Issue ID:                   16015
Category:                   CMake
Reproducibility:            always
Severity:                   trivial
Priority:                   low
Status:                     new
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Date Submitted:             2016-03-12 16:52 EST
Last Modified:              2016-03-12 16:52 EST
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Summary:                    'cmake -U*' causes SIGABRT in
cmGlobalGenerator::EnableLanguage()
Description: 
Doing 'cmake -U*' leads to a SIGABRT in cmGlobalGenerator::EnableLanguage() with
the following message: "what():  basic_string::_S_construct NULL not valid".

Steps to Reproduce: 
At git tag "v3.5.0-rc3" do the following:

$ touch CMakeLists.txt
$ cmake .
[...]
$ cmake -U"*"
[...]
terminate called after throwing an instance of 'std::logic_error'
  what():  basic_string::_S_construct NULL not valid
Aborted (core dumped)

Additional Information: 
The reason for the SIGABRT is that in EnableLanguage() an std::string is
constructed from a char null-pointer.

This can be reproduced also at git tag "v2.6.0".

Note that the general issue of construction of std::strings from null pointers
in CMake has already been reported in 0014005. But the concrete example given
(and fixed) there is different from the one here.
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Issue History 
Date Modified    Username       Field                    Change               
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2016-03-12 16:52 Julian Schmidt New Issue                                    
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