Cannot convert from `char[]' to `unowned uint8[]?'

[akrenz]

I get the following errors if I try to compile easyssh 1.6.6 on Solus. Here is the complete error log:

../src/Widgets/TerminalWidget.vala:219.33-219.46: error: Argument 1: Cannot convert from `char[]' to `unowned uint8[]?'
                this.feed_child(cmd.to_utf8 ());
                                ^^^^^^^^^^^^^^
../src/Widgets/SearchToolbar.vala:97.21-97.42: warning: `Vte.Terminal.search_set_gregex' has been deprecated since 0.46
../src/Widgets/TerminalBox.vala:103.33-103.46: error: Argument 1: Cannot convert from `char[]' to `unowned uint8[]?'
                term.feed_child(cmd.to_utf8 ());
                                ^^^^^^^^^^^^^^
../src/Widgets/TerminalBox.vala:210.33-210.48: error: Argument 1: Cannot convert from `char[]' to `unowned uint8[]?'
                term.feed_child(n_cmd.to_utf8 ());
                                ^^^^^^^^^^^^^^^^
../src/Widgets/TerminalBox.vala:201.33-201.46: error: Argument 1: Cannot convert from `char[]' to `unowned uint8[]?'
                term.feed_child(cmd.to_utf8 ());

I fixed it by casting cmd.to_utf8() to uint8[].

[muriloventuroso]

Please repeat the build using the "ubuntu-bionic-patched-vte" option.
This is a compatibility issue between versions of lib Gtk.VTE

[akrenz]

Well, Solus is using latest libvte (0.60.3) and Vala (0.48.6) and building with "ubuntu-bionic-patched-vte" option also fails.

It reports the same errors as mentioned in this task and also multiple:

error: 1 extra arguments for `void Vte.Terminal.feed_child (uint8[]?)'
                this.feed_child(cmd, cmd.length);

So enabling this options does not fix the issue.