"Fill struct fields" assist has stopped showing up in many cases

rust-analyzer version: 0.3.1916-standalone

rustc version: rustc 1.77.1 (7cf61ebde 2024-03-27)

editor or extension: VS Code

relevant settings:

"rust-analyzer.hover.documentation.keywords.enable": false,
"rust-analyzer.cargo.buildScripts.useRustcWrapper": false,
"rust-analyzer.workspace.symbol.search.kind": "all_symbols",
"rust-analyzer.diagnostics.enable": false,
"rust-analyzer.inlayHints.closureStyle": "rust_analyzer",
"rust-analyzer.cargo.sysrootQueryMetadata": true,

This is not the first time I've seen this happen, but this time it isn't happening in a macro (which I understand are difficult to handle in IDEs), and I see no other reason why "fill struct fields" shouldn't show up here. I've written wgpu::BindGroupLayoutEntry { } and while field completions work, there is no option to fill all missing fields like there used to.

Reproduce the issue in VS Code using wgpu::BindGroupLayoutEntry { } with rust-analyzer 0.3.1916 and check whether field completions appear without the "fill struct fields" assist. Trace the completion path for this assist and add a regression test for the reported case; done means the assist appears and fills all missing fields.