sfdp_layout(): Prevent Barnes-Hut tree from becoming unnecessarily dense

8 jobs for master
Status Name Job ID Coverage
  Test
failed job_clang_amd64 #823
amd64

00:01:03

failed job_clang_amd64_nosh #827
amd64

00:00:52

failed job_clang_py2_amd64 #825
amd64

00:01:00

failed job_gcc_386 #820
i386

02:46:46

passed job_gcc_amd64 #822
amd64

02:15:35

passed job_gcc_amd64_nosh #826
amd64

02:16:22

failed job_gcc_py2_386 #821
i386

02:40:37

passed job_gcc_py2_amd64 #824
amd64

02:14:03

 
Name Stage Failure
failed
job_clang_amd64_nosh Test There is an unknown failure, please try again
checking how to hardcode library paths into programs... immediate
checking for pkg-config... /usr/bin/pkg-config
checking pkg-config is at least version 0.9.0... yes
checking whether ccache clang++ supports C++14 features by default... no
checking whether ccache clang++ supports C++14 features with -std=gnu++14... no
checking whether ccache clang++ supports C++14 features with -std=gnu++0x... no
configure: error: *** A compiler with support for C++14 language features is required.

ERROR: Build failed with: exit status 1
failed
job_gcc_386 Test There is an unknown failure, please try again
  warnings.warn("tight_layout : falling back to Agg renderer")
/usr/lib/python3/dist-packages/matplotlib/tight_layout.py:222: UserWarning: tight_layout : falling back to Agg renderer
warnings.warn("tight_layout : falling back to Agg renderer")
/usr/lib/python3/dist-packages/matplotlib/tight_layout.py:222: UserWarning: tight_layout : falling back to Agg renderer
warnings.warn("tight_layout : falling back to Agg renderer")
/usr/lib/python3/dist-packages/matplotlib/tight_layout.py:222: UserWarning: tight_layout : falling back to Agg renderer
warnings.warn("tight_layout : falling back to Agg renderer")

ERROR: Build failed with: exit status 1
failed
job_gcc_py2_386 Test There is an unknown failure, please try again
Doctest summary
===============
860 tests
1 failure in tests
0 failures in setup code
0 failures in cleanup code
build finished with problems, 137 warnings.

ERROR: Build failed with: exit status 1
failed
job_clang_amd64 Test There is an unknown failure, please try again
checking how to hardcode library paths into programs... immediate
checking for pkg-config... /usr/bin/pkg-config
checking pkg-config is at least version 0.9.0... yes
checking whether ccache clang++ supports C++14 features by default... no
checking whether ccache clang++ supports C++14 features with -std=gnu++14... no
checking whether ccache clang++ supports C++14 features with -std=gnu++0x... no
configure: error: *** A compiler with support for C++14 language features is required.

ERROR: Build failed with: exit status 1
failed
job_clang_py2_amd64 Test There is an unknown failure, please try again
checking how to hardcode library paths into programs... immediate
checking for pkg-config... /usr/bin/pkg-config
checking pkg-config is at least version 0.9.0... yes
checking whether ccache clang++ supports C++14 features by default... no
checking whether ccache clang++ supports C++14 features with -std=gnu++14... no
checking whether ccache clang++ supports C++14 features with -std=gnu++0x... no
configure: error: *** A compiler with support for C++14 language features is required.

ERROR: Build failed with: exit status 1