The actual error message for the eclipse-cdt FTBFS was snipped from the log in the bug report, it is:
[javac] 67. ERROR in /tmp/eclipse-cdt-8.6.0/debian/.eclipse-build/org.eclipse.cdt.core/model/org/eclipse/cdt/core/settings/model/util/PatternNameMap.java (at line 90) [javac] private class ValuesCollection extends AbstractCollection<PathSettingsContainer> { [javac] ^^^^^^^^^^^^^^^^ [javac] Duplicate methods named spliterator with the parameters () and () are inherited from the types Collection<PathSettingsContainer> and Iterable<PathSettingsContainer> This looks quite similar #757536 in eclipse, and the solution is likely the same (upgrade the Debian package to a non-ancient version that supports Java 8). cu Adrian -- "Is there not promise of rain?" Ling Tan asked suddenly out of the darkness. There had been need of rain for many days. "Only a promise," Lao Er said. Pearl S. Buck - Dragon Seed