Strange error related to vectors and UnityEngine-Debug.dll

I'm getting this bizarre error:

error CS0121: The call is ambiguous between the following methods or properties: `UnityEngine.Vector3.operator --(UnityEngine.Vector3, UnityEngine.Vector3)' and `UnityEngine.Vector2.operator --(UnityEngine.Vector2, UnityEngine.Vector2)'
/Applications/Unity/Unity.app/Contents/Frameworks/UnityEngine-Debug.dll (Location of the symbol related to previous error)

The annoying thing is, it doesn't tell me what part of my code is causing the error. The link to UnityEngine-Debug.dll doesn't tell me much..

Thanks for any help.

 

Can you reproduce the errors in a new project? Would give an idea of what we're dealing with.

 

Well, actually I managed to solve it by trial and error. I was adding a Vector3 instance to a Vector2 instance, using the + operator.

 

Ah. The error message could be done more nicely though.

 

I am also getting the same error. How to solve this?

error CS0121: The call is ambiguous between the following methods or properties: `UnityEngine.Vector2.operator -(UnityEngine.Vector2, UnityEngine.Vector2)' and `UnityEngine.Vector3.operator -(UnityEngine.Vector3, UnityEngine.Vector3)'

My code part is:
if(Input.GetMouseButton(0))
{
if(prevMousePos.x == 0 prevMousePos.y == 0)
{
prevMousePos = Input.mousePosition;
}
Vector2 touchDeltaPosition = new Vector2(Input.mousePosition - prevMousePos);
prevMousePos = Input.mousePosition;
}

 

Try casting. It may resolve the problem.

For example, let's say this is the code (in C#):

private Vector2 lastPos
private bool swiping

void Update() {
if(Input.touchCount == 0) {
if(Input.mousePosition.sqrMagnitude != 0) {
if(!swiping) {
swiping = true;
lastPos = Input.mousePosition; // --> mousePosition is Vector3 and still acceptable.
return;
} else {
Vector2 direction = (Vector2) Input.mousePosition - lastPos; // --> I simply add a cast onto the mousePosition to resolve it.
}
} else {
swiping = false;
}
}
}

 

Try casting. It may resolve the problem.

For example, let's say this is the code (in C#):

private Vector2 lastPos
private bool swiping

void Update() {
if(Input.touchCount == 0) {
if(Input.mousePosition.sqrMagnitude != 0) {
if(!swiping) {
swiping = true;
lastPos = Input.mousePosition; // --> mousePosition is Vector3 and still acceptable.
return;
} else {
Vector2 direction = (Vector2) Input.mousePosition - lastPos; // --> I simply add a cast onto the mousePosition to resolve it.
}
} else {
swiping = false;
}
}
}