rust-doc-open: Failed to open URL: Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/%{ <-- HERE (.*?)}/ at usr/bin/run-mailcap line 528.^@Couldn't find a suitable web browser!^@Set the BROWSER environment variable to your desired browser.^@Warning: program returned non-zero exit code #1^@/usr/bin/xdg-open: 771: /usr/bin/xdg-open: www-browser: not found^@/usr/bin/xdg-open: 771: /usr/bin/xdg-open: links2: not found^@/usr/bin/xdg-open: 771: /usr/bin/xdg-open: elinks: not found^@/usr/bin/xdg-open: 771: /usr/bin/xdg-open: links: not found^@/usr/bin/xdg-open: 771: /usr/bin/xdg-open: lynx: not found^@/usr/bin/xdg-open: 771: /usr/bin/xdg-open: w3m: not found^@xdg-open: no method available for opening '/home/miyagaw61/docs/rust-docs/share/doc/rust/html/std/vec/index.html'^@

$ exportPATH=$PATH:/path/to
$ cat << EOF > /path/to/chrome/mnt/c/Program\ Files\ \(x86\)/Google/Chrome/Application/chrome.exe $@EOF
$ exportBROWSER=chrome

$ nvim /path/to/rust.vim/autoload/rust_doc.vim # 僕の場合は~/.cache/dein/repos/github.com/rhysd/rust-doc.vim/autoload/rust_doc.vim# 以下の4行を該当部分に追記function! s:open(item) abort
    echomsg printf("rust-doc: '%s' is found", a:item.name)leturl= shellescape(a:item.path)if g:rust_doc#vim_open_cmd !=''
        execute g:rust_doc#vim_open_cmd urlreturn
    endifif g:rust_doc#open_cmd !=''letoutput= system(g:rust_doc#open_cmd . ' ' . url)if v:shell_error
            call s:error("Failed to open URL: " . output)
        endifreturn
    endif

+    call system('cp ' . url . ' ./rust_doc.html')
+    call system('chrome rust_doc.html')
+    call system('rm -rf rust_doc.html')
+    return

    try
        call openbrowser#open(url)
    catch /^Vim\%((\a\+)\)\=:E117/if has('win32')|| has('win64')letcmd='rundll32 url.dll,FileProtocolHandler ' . url
        elseif executable('xdg-open')&& has('unix')letcmd='xdg-open ' . url
        elseif executable('open')&& has('mac')letcmd='open ' . url
        elseif executable('google-chrome')letcmd='google-chrome ' . url
        elseif executable('firefox')letcmd='firefox ' . urlelse
            call s:error("No command is found to open URL. Please set g:rust_doc#open_cmd")return
        endifletoutput= system(cmd)if v:shell_error
            call s:error("Failed to open URL: " . output)
        endif
    endtry
endfunction