With ReSharper active, type info is hidden from tooltips when unused values or errors are present

[TeaDrivenDev]

Update from @cartermp

#3547 is the same issue, except for an error rather than the unused value analyzer.

Repro steps

1. Create a let binding in F# code, leave the value unused
2. Hover over the name with the mouse pointer

Expected behavior

The Tooltip displays type information for the value.

Actual behavior

The tooltip only says "The value is unused - Show potential fixes".

Known workarounds

Set the caret on the name, press Ctrl-K, Ctrl-I

Related information

VFT version 15.4.1.17051503

[vasily-kirichenko]

@majocha it seems tooltips are broken even in master :( @TeaDrivenDev can you say in what version you saw this bug first time?

[majocha]

I can't reproduce this on master :|
I'm downloading 1503 and will try.

[majocha]

Can't reproduce on 1503 either. @TeaDrivenDev is this occurring randomly?

[majocha]

Current master:

As can be seen, Visual Studio puts the tooltip together from various sources asynchronously. Various parts show up independently and shouldn't interfere.
If for example getTooltipFromRange fails or GetItemAsync is very late, the displayed result could be exactly as in this issue. Just speculation until I can repro this.

[TeaDrivenDev]

@majocha No, it's consistent. I don't remember ever seeing it work as in your screenshot. The type information never shows up, even on small self-contained scripts.

[TeaDrivenDev]

I just checked on my other machine, and it appears to work fine there (VS 2017 Community with 17051401). It doesn't work at all on this one (VS 2017 Professional); I also suspended ReSharper (just to be sure), but that didn't change anything.

[majocha]

@TeaDrivenDev thanks for the follow-up. This is mysterious. I can't think of anything that would break this between 514 and 515.

[TeaDrivenDev]

@majocha It doesn't seem to be related to the versions; it still works fine on the other machine with 1604. So there appears to be something on that one system that prevents the tooltip from being updated.

[majocha]

@TeaDrivenDev this bug happens on a particular configuration, and only when triggered with the mouse, not the keyboard, and only when there is also a "unused value" hint?

[TeaDrivenDev]

@majocha Yes, exactly. The system in question has now updated to 1604 as well and still shows that behavior.

[majocha]

Thanks, this gives me some ideas about what to look into.

[cartermp]

@TeaDrivenDev Can you still reproduce this?

[TeaDrivenDev]

@cartermp Yes, consistently on one machine, never on the other.