Created attachment 886 [details]
program demonstrating hang when calling M.log()
The matrix log() function in unsupported/Eigen/MatrixFunctions can hang when the matrix is (not invertable, has no log...? I haven't investigated the exact conditions yet...)
Oddly, it only hangs for matrices bigger than 2x2.
Test program attached.
g++ (GCC) 7.3.1 20180712 (Red Hat 7.3.1-6)
clang version 5.0.2 (tags/RELEASE_502/final)
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