error[E0495]: cannot infer an appropriate lifetime for lifetime parameter `'a` due to conflicting requirements
  --> stack.rs:68:3
   |
68 | 		Stack { data: v}
   | 		^^^^^
   |
note: first, the lifetime cannot outlive the anonymous lifetime #1 defined on the method body at 66:2...
  --> stack.rs:66:2
   |
66 | / 	pub fn new_w_vec(v: &mut Vec<f64>) -> Self
67 | | 	{
68 | | 		Stack { data: v}
69 | | 	}
   | |__^
note: ...so that reference does not outlive borrowed content
  --> stack.rs:68:17
   |
68 | 		Stack { data: v}
   | 		              ^
note: but, the lifetime must be valid for the lifetime 'c as defined on the impl at 10:1...
  --> stack.rs:10:1
   |
10 | / impl<'c> Stack<'c>
11 | | {
12 | | 	pub fn push(&mut self, val: f64)
13 | | 	{
...  |
69 | | 	}
70 | | }
   | |_^
note: ...so that expression is assignable (expected stack::Stack<'c>, found stack::Stack<'_>)
  --> stack.rs:68:3
   |
68 | 		Stack { data: v}
   | 		^^^^^^^^^^^^^^^^