Auto merge of #11368 - dtolnay-contrib:partial, r=Muscraft
Auto merge of #11368 - dtolnay-contrib:partial, r=Muscraft

Fix failure to parse rustc's JSON output if it is too nested

eminence/cargo,rust-lang/cargo,rust-lang/cargo,eminence/cargo,eminence/cargo,rust-lang/cargo,eminence/cargo,rust-lang/cargo