http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59557

            Bug ID: 59557
           Summary: [4.8/4.9 Regression]
           Product: gcc
           Version: 4.8.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rguenth at gcc dot gnu.org

Created attachment 31479
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31479&action=edit
testcase

A libstdc++ change between r202388 and the 4.8.2 release broke Eigen. 
Preprocessing the attached testcase with 4.8.2 and then compiling with -O0
gives

> ./a.out                                                  
Brute force distance = 0.00428018, calls = 10000                                
Segmentation fault      

while preprocessing with 4.8.1 gets the correct

> ./a.out                                                  
Brute force distance = 0.00428018, calls = 10000                                
BVH distance         = 0.00428018, calls = 756

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