remove a bunch of unnecessary 'pub' from tests

Author: RalfJung

tests/fail/both_borrows/aliasing_mut1.rs

@@ -2,7 +2,7 @@
 //@[tree]compile-flags: -Zmiri-tree-borrows
 use std::mem;
 
-pub fn safe(x: &mut i32, y: &mut i32) {
+fn safe(x: &mut i32, y: &mut i32) {
     //~[stack]^ ERROR: protect
     *x = 1; //~[tree] ERROR: /write access through .* is forbidden/
     *y = 2;

tests/fail/both_borrows/aliasing_mut1.stack.stderr

@@ -1,8 +1,8 @@
 error: Undefined Behavior: not granting access to tag <TAG> because that would remove [Unique for <TAG>] which is strongly protected
   --> tests/fail/both_borrows/aliasing_mut1.rs:LL:CC
    |
-LL | pub fn safe(x: &mut i32, y: &mut i32) {
-   |                          ^ Undefined Behavior occurred here
+LL | fn safe(x: &mut i32, y: &mut i32) {
+   |                      ^ Undefined Behavior occurred here
    |
    = help: this indicates a potential bug in the program: it performed an invalid operation, but the Stacked Borrows rules it violated are still experimental
    = help: see https://github.com/rust-lang/unsafe-code-guidelines/blob/master/wip/stacked-borrows.md for further information
@@ -14,8 +14,8 @@ LL |     let xraw: *mut i32 = unsafe { mem::transmute(&mut x) };
 help: <TAG> is this argument
   --> tests/fail/both_borrows/aliasing_mut1.rs:LL:CC
    |
-LL | pub fn safe(x: &mut i32, y: &mut i32) {
-   |             ^
+LL | fn safe(x: &mut i32, y: &mut i32) {
+   |         ^
    = note: BACKTRACE (of the first span):
    = note: inside `safe` at tests/fail/both_borrows/aliasing_mut1.rs:LL:CC
 note: inside `main`

tests/fail/both_borrows/aliasing_mut1.tree.stderr

@@ -10,13 +10,13 @@ LL |     *x = 1;
 help: the accessed tag <TAG> was created here, in the initial state Reserved
   --> tests/fail/both_borrows/aliasing_mut1.rs:LL:CC
    |
-LL | pub fn safe(x: &mut i32, y: &mut i32) {
-   |             ^
+LL | fn safe(x: &mut i32, y: &mut i32) {
+   |         ^
 help: the accessed tag <TAG> later transitioned to Reserved (conflicted) due to a reborrow (acting as a foreign read access) at offsets [0x0..0x4]
   --> tests/fail/both_borrows/aliasing_mut1.rs:LL:CC
    |
-LL | pub fn safe(x: &mut i32, y: &mut i32) {
-   |                          ^
+LL | fn safe(x: &mut i32, y: &mut i32) {
+   |                      ^
    = help: this transition corresponds to a temporary loss of write permissions until function exit
    = note: BACKTRACE (of the first span):
    = note: inside `safe` at tests/fail/both_borrows/aliasing_mut1.rs:LL:CC

tests/fail/both_borrows/aliasing_mut2.rs

@@ -2,7 +2,7 @@
 //@[tree]compile-flags: -Zmiri-tree-borrows
 use std::mem;
 
-pub fn safe(x: &i32, y: &mut i32) {
+fn safe(x: &i32, y: &mut i32) {
     //~[stack]^ ERROR: protect
     let _v = *x;
     *y = 2; //~[tree] ERROR: /write access through .* is forbidden/

tests/fail/both_borrows/aliasing_mut2.stack.stderr

@@ -1,8 +1,8 @@
 error: Undefined Behavior: not granting access to tag <TAG> because that would remove [SharedReadOnly for <TAG>] which is strongly protected
   --> tests/fail/both_borrows/aliasing_mut2.rs:LL:CC
    |
-LL | pub fn safe(x: &i32, y: &mut i32) {
-   |                      ^ Undefined Behavior occurred here
+LL | fn safe(x: &i32, y: &mut i32) {
+   |                  ^ Undefined Behavior occurred here
    |
    = help: this indicates a potential bug in the program: it performed an invalid operation, but the Stacked Borrows rules it violated are still experimental
    = help: see https://github.com/rust-lang/unsafe-code-guidelines/blob/master/wip/stacked-borrows.md for further information
@@ -14,8 +14,8 @@ LL |     let xref = &mut x;
 help: <TAG> is this argument
   --> tests/fail/both_borrows/aliasing_mut2.rs:LL:CC
    |
-LL | pub fn safe(x: &i32, y: &mut i32) {
-   |             ^
+LL | fn safe(x: &i32, y: &mut i32) {
+   |         ^
    = note: BACKTRACE (of the first span):
    = note: inside `safe` at tests/fail/both_borrows/aliasing_mut2.rs:LL:CC
 note: inside `main`

tests/fail/both_borrows/aliasing_mut2.tree.stderr

@@ -10,8 +10,8 @@ LL |     *y = 2;
 help: the accessed tag <TAG> was created here, in the initial state Reserved
   --> tests/fail/both_borrows/aliasing_mut2.rs:LL:CC
    |
-LL | pub fn safe(x: &i32, y: &mut i32) {
-   |                      ^
+LL | fn safe(x: &i32, y: &mut i32) {
+   |                  ^
 help: the accessed tag <TAG> later transitioned to Reserved (conflicted) due to a foreign read access at offsets [0x0..0x4]
   --> tests/fail/both_borrows/aliasing_mut2.rs:LL:CC
    |

tests/fail/both_borrows/aliasing_mut3.rs

@@ -2,7 +2,7 @@
 //@[tree]compile-flags: -Zmiri-tree-borrows
 use std::mem;
 
-pub fn safe(x: &mut i32, y: &i32) {
+fn safe(x: &mut i32, y: &i32) {
     //~[stack]^ ERROR: borrow stack
     *x = 1; //~[tree] ERROR: /write access through .* is forbidden/
     let _v = *y;

tests/fail/both_borrows/aliasing_mut3.stack.stderr

@@ -1,8 +1,8 @@
 error: Undefined Behavior: trying to retag from <TAG> for SharedReadOnly permission at ALLOC[0x0], but that tag does not exist in the borrow stack for this location
   --> tests/fail/both_borrows/aliasing_mut3.rs:LL:CC
    |
-LL | pub fn safe(x: &mut i32, y: &i32) {
-   |                          ^ this error occurs as part of function-entry retag at ALLOC[0x0..0x4]
+LL | fn safe(x: &mut i32, y: &i32) {
+   |                      ^ this error occurs as part of function-entry retag at ALLOC[0x0..0x4]
    |
    = help: this indicates a potential bug in the program: it performed an invalid operation, but the Stacked Borrows rules it violated are still experimental
    = help: see https://github.com/rust-lang/unsafe-code-guidelines/blob/master/wip/stacked-borrows.md for further information

tests/fail/both_borrows/aliasing_mut3.tree.stderr

@@ -10,13 +10,13 @@ LL |     *x = 1;
 help: the accessed tag <TAG> was created here, in the initial state Reserved
   --> tests/fail/both_borrows/aliasing_mut3.rs:LL:CC
    |
-LL | pub fn safe(x: &mut i32, y: &i32) {
-   |             ^
+LL | fn safe(x: &mut i32, y: &i32) {
+   |         ^
 help: the accessed tag <TAG> later transitioned to Reserved (conflicted) due to a reborrow (acting as a foreign read access) at offsets [0x0..0x4]
   --> tests/fail/both_borrows/aliasing_mut3.rs:LL:CC
    |
-LL | pub fn safe(x: &mut i32, y: &i32) {
-   |                          ^
+LL | fn safe(x: &mut i32, y: &i32) {
+   |                      ^
    = help: this transition corresponds to a temporary loss of write permissions until function exit
    = note: BACKTRACE (of the first span):
    = note: inside `safe` at tests/fail/both_borrows/aliasing_mut3.rs:LL:CC

tests/fail/both_borrows/aliasing_mut4.rs

@@ -5,7 +5,7 @@ use std::cell::Cell;
 use std::mem;
 
 // Make sure &mut UnsafeCell also is exclusive
-pub fn safe(x: &i32, y: &mut Cell<i32>) {
+fn safe(x: &i32, y: &mut Cell<i32>) {
     //~[stack]^ ERROR: protect
     y.set(1);
     let _load = *x;