I ended up here with a very similar error to Fontconfig error: cannot load default config file launching the latest google-chrome-stable (Version 65.0.3325.181 (Official Build) (64-bit)) from the command line with the intent of locking it to the launch bar. The aforementioned which I received when updating today.
The exact output received is as follows:
$ google-chrome-stable
Fontconfig warning: "/etc/fonts/fonts.conf", line 146: blank doesn't take any effect anymore. please remove it from your fonts.conf
ATTENTION: default value of option force_s3tc_enable overridden by environment.
[4946:4946:0321/143522.945617:ERROR:gpu_process_transport_factory.cc(1019)] Lost UI shared context.
[1:10:0321/143522.993869:ERROR:command_buffer_proxy_impl.cc(114)] ContextResult::kFatalFailure: Shared memory handle is not valid
[4946:4985:0321/143528.000996:ERROR:upload_data_presenter.cc(73)] Not implemented reached in virtual void extensions::RawDataPresenter::FeedNext(const net::UploadElementReader &)
[4946:4985:0321/143528.189366:ERROR:upload_data_presenter.cc(73)] Not implemented reached in virtual void extensions::RawDataPresenter::FeedNext(const net::UploadElementReader &)
[4946:4985:0321/143528.302925:ERROR:upload_data_presenter.cc(73)] Not implemented reached in virtual void extensions::RawDataPresenter::FeedNext(const net::UploadElementReader &)
[4946:4985:0321/143528.761029:ERROR:upload_data_presenter.cc(73)] Not implemented reached in virtual void extensions::RawDataPresenter::FeedNext(const net::UploadElementReader &)
Fontconfig error: line 152: mismatched tag
Fontconfig error: Cannot load default config file
[4946:4985:0321/143809.554796:ERROR:upload_data_presenter.cc(73)] Not implemented reached in virtual void extensions::RawDataPresenter::FeedNext(const net::UploadElementReader &)
The first thing I noticed was the warning regarding line 146 in
/etc/fonts/fonts.conf
which only had the</blank>
tag on the line line so I removed it. Then I noticed the error on line 152. I attempted the accepted answer to the question linked in the question above to no positive affect so I assumed that line 152 was the problem. Upon further review of the file I noticed that line 152 only contains a</config>
tag and found a corresponding<config>
tag on line 80 so I decided that can't be it as everything between<config>
and</config>
looks pretty important. Then I noticed the<blank>
tag on line 86 and decided that I had inadvertently broken the file by removing the ending tag with out the beginning tag. So I removed line 86 as well and saved the file.This approach resolved the problem immediately.