build-script fails with error:
Warning, treated as error:
/Users/-------/Documents/Apple/swift/docs/proposals/UnsupportedOptimizationAttributes.rst:18:undefined label: transparent-attribute (if the link has no caption the label must precede a section header)
[463/1834][ 25%][392.153s] Building CXX object stdlib/publi...swiftRemoteMirror-macosx-x86_64.dir/SwiftRemoteMirror.cpp.o
ninja: build stopped: subcommand failed.
ERROR: command terminated with a non-zero exit status 1, aborting
What's the problem with the build? Is this because of some problems with
UnsupportedOptimizationAttributes.rst? How to fix this?