install error!!
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Jiongyu commented
sudo ./bootstrap_toolchain
autoproj: installing a proper Ruby environment (this can take a long time)
autoproj: installing autoproj and its dependencies (this can take a long time)
./bootstrap_toolchain:677:in `block in filter_uptodate_gems': undefined method `source_index' for Gem:Module (NoMethodError)
Did you mean? sources
from ./bootstrap_toolchain:675:in `delete_if'
from ./bootstrap_toolchain:675:in `filter_uptodate_gems'
from ./bootstrap_toolchain:974:in `install'
from ./bootstrap_toolchain:1559:in `<main>'