Fix tests

Author: Avi-D-coder

src/test/ui/stability-attribute/generics-default-stability.rs

@@ -37,7 +37,7 @@ fn main() {
     let _ = STRUCT1; // ok
     let _: Struct1 = STRUCT1; // ok
     let _: Struct1<usize> = STRUCT1; //~ ERROR use of unstable library feature 'unstable_default'
-    let _: Struct1<isize> = STRUCT1; //~ ERROR use of unstable library feature 'unstable_default'
+    let _: Struct1<isize> = Struct1 { field: 0 }; //~ ERROR use of unstable library feature 'unstable_default'
 
     // Instability is not enforced for generic type parameters used in public fields.
     // Note how the unstable type default `usize` leaks,
@@ -56,7 +56,7 @@ fn main() {
     let _ = STRUCT2;
     let _: Struct2 = STRUCT2; // ok
     let _: Struct2<usize> = STRUCT2; // ok
-    let _: Struct2<usize> = STRUCT2; // ok
+    let _: Struct2<isize> = Struct2 { field: 0 }; // ok
     let _ = STRUCT2.field; // ok
     let _: usize = STRUCT2.field; // ok
     let _ = STRUCT2.field + 1; // ok

src/test/ui/stability-attribute/generics-default-stability.stderr

@@ -23,25 +23,25 @@ LL | impl Trait2<usize> for S {
    = help: add `#![feature(unstable_default)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_default'
-  --> $DIR/generics-default-stability.rs:37:20
+  --> $DIR/generics-default-stability.rs:35:20
    |
 LL |     let _: Struct1<isize> = Struct1 { field: 1 };
    |                    ^^^^^
    |
    = help: add `#![feature(unstable_default)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_default'
-  --> $DIR/generics-default-stability.rs:41:20
+  --> $DIR/generics-default-stability.rs:39:20
    |
 LL |     let _: Struct1<usize> = STRUCT1;
    |                    ^^^^^
    |
    = help: add `#![feature(unstable_default)]` to the crate attributes to enable
 
 error[E0658]: use of unstable library feature 'unstable_default'
-  --> $DIR/generics-default-stability.rs:42:20
+  --> $DIR/generics-default-stability.rs:40:20
    |
-LL |     let _: Struct1<usize> = STRUCT1;
+LL |     let _: Struct1<isize> = Struct1 { field: 0 };
    |                    ^^^^^
    |
    = help: add `#![feature(unstable_default)]` to the crate attributes to enable