thunderbird 115.10 build failure on -current

From: Michael Butler <imb_at_protected-networks.net>
Date: Wed, 17 Apr 2024 21:07:32 UTC 
In a clean environment with default options on -current, I get ..

error[E0412]: cannot find type `_Pred` in this scope
      --> 
/usr/ports/mail/thunderbird/work/.build/x86_64-unknown-freebsd/release/build/style-5fb673490cc43b88/out/gecko/structs.rs:34497:49
       |
34497 |                 pub _base: root::std::__1::_And<_Pred>,
       |                                                 ^^^^^ not found 
in this scope
       |
help: you might be missing a type parameter
       |
34496 |             pub struct tuple__EnableUTypesCtor<_Pred> {
       |                                               +++++++

Any hints?

	Michael