[BUG] gtlib-macros: testsuite started failing with 0.20.3

[werdahias]

Bug description
All autopkgtests in Debian for glib-macros started to fail with 0.20.3:

722s error[E0437]: type `Instance` is not a member of trait `ObjectInterface`
722s    --> src/subclass/object.rs:507:9
722s     |
722s 507 |         #[glib::object_interface]
722s     |         ^^^^^^^^^^^^^^^^^^^^^^^^^ not a member of trait `ObjectInterface`
722s     |
722s     = note: this error originates in the attribute macro `glib::object_interface` (in Nightly builds, run with -Z macro-backtrace for more info)
722s 

Today I updated glib-macros to 0.20.4 and got a different error this time:

error[E0716]: temporary value dropped while borrowed
  --> tests/properties.rs:96:43
   |
85 |         #[derive(Properties, Default)]
   |                  ----------
   |                  |        |
   |                  |        temporary value is freed at the end of this statement
   |                  argument requires that borrow lasts for `'static`
...
96 |             #[property(get, set, builder(&<Option<i32>>::static_variant_type()))]
   |                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary value which is freed while still in use

For more information about this error, try `rustc --explain E0716`.
error: could not compile `glib-macros` (test "properties") due to 1 previous error

This happens for all features. Let me know if you need more information

[sdroege]

You need to update glib to 0.20.3 or newer too. The dependency update in Cargo.toml for that is missing. Can you send a PR for the 0.20 branch for that?

[sdroege]

#1527

[werdahias]

Thanks, will cherrypick this commit

[werdahias]

Forcing glib-macros to depend on glib 0.20.4 and doing the same (inverted) for glib fixed this for me.