Highlight related line

Editors and IDEs
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I was watching fasterthanlime's video about self-referential structs, and he had this bit of code
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You can see the error it has. The error is on line 5 and mentions like 17. You can get something similar with other things, like trying to use a variable after a function takes ownership of it.

My question is, how'd he get his editor (VS Code) to also highlight line 17? Mine will highlight line 5 fine, but not line 17.

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Could be the "Error Lens" extension, though I'm not sure at all.

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Error Lens is what turns Rust Analyzer's squiggle into the much more visible thing, but the- ok hold on one second...

Ok, I figured it out. I needed to add "hint" to this Error Lens setting
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