goimports Does Not Run on Save

[bobhancock]

Sublime Text Version: 3.2.1
Ubuntu 18.04.2 LTS

GoSublimer.sublime-settings:
{
"env": {
"GOPATH": "/home/rwh/go",
"GOROOT": "/usr/local/go"
},
"fmt_cmd": ["goimports"],
}

/home/rwh/go/bin is in the $PATH

which goimports
/home/rwh/go/bin/goimports

goimports runs from the command line.

I inserted the new reducer you references #914 and the results of goimports-test are:

[ goimports-test | done ]
2019/04/13 21:25:53.337186 fixImports(filename="/opt/sublime_text/view@18,mg.NewReducerfuncmxmg.Ctxmg.State/"), abs="/opt/sublime_text/view@18,mg.NewReducerfuncmxmg.Ctxmg.State/", srcDir="/opt/sublime_text/view@18,mg.NewReducerfuncmxmg.Ctxmg.State" ...
[ /opt/sublime_text/ ] #
[ ~/go/src/zarc/ ] #

What is the next step to debug?