Rollup merge of #157103 - zetanumbers:update_failing_parallel_tests_1, r=nnethercote

Add reproducibly failing tests for parallel frontend

Some tests keep fail with `--parallel-frontend-threads=n`. This PR marks them for tracking and to filter those out for regular tests of the parallel frontend. There are two new similar categories for test failures: `unstable liveness diagnostics` and `pattern matching error message mismatch`. Both of them appear to be just printed diagnostic inconsistencies.

Author: JonathanBrouwer

tests/ui/closures/2229_closure_analysis/diagnostics/liveness.rs

@@ -1,6 +1,6 @@
 //@ edition:2021
-
 //@ check-pass
+//@ ignore-parallel-frontend unstable liveness diagnostics
 #![allow(unreachable_code)]
 #![warn(unused)]
 #![allow(dead_code)]

tests/ui/lint/unused/unused-assign-148960.rs

@@ -1,4 +1,5 @@
 //@ check-fail
+//@ ignore-parallel-frontend unstable liveness diagnostics
 #![deny(unused)]
 #![allow(dead_code)]
 

tests/ui/lint/unused/unused-assign-148960.stderr

@@ -1,44 +1,44 @@
 error: value assigned to `value` is never read
-  --> $DIR/unused-assign-148960.rs:6:21
+  --> $DIR/unused-assign-148960.rs:7:21
    |
 LL |     let mut value = b"0".to_vec();
    |                     ^^^^^^^^^^^^^ this value is reassigned later and never used
 LL |     value = b"1".to_vec();
    |     ----- `value` is overwritten here before the previous value is read
    |
 note: the lint level is defined here
-  --> $DIR/unused-assign-148960.rs:2:9
+  --> $DIR/unused-assign-148960.rs:3:9
    |
 LL | #![deny(unused)]
    |         ^^^^^^
    = note: `#[deny(unused_assignments)]` implied by `#[deny(unused)]`
 
 error: value assigned to `x` is never read
-  --> $DIR/unused-assign-148960.rs:12:17
+  --> $DIR/unused-assign-148960.rs:13:17
    |
 LL |     let mut x = 1;
    |                 ^ this value is reassigned later and never used
 LL |     x = 2;
    |     ----- `x` is overwritten here before the previous value is read
 
 error: value assigned to `x` is never read
-  --> $DIR/unused-assign-148960.rs:13:5
+  --> $DIR/unused-assign-148960.rs:14:5
    |
 LL |     x = 2;
    |     ^^^^^ this value is reassigned later and never used
 LL |     x = 3;
    |     ----- `x` is overwritten here before the previous value is read
 
 error: value assigned to `p` is never read
-  --> $DIR/unused-assign-148960.rs:24:17
+  --> $DIR/unused-assign-148960.rs:25:17
    |
 LL |     let mut p = Point { x: 1, y: 1 };
    |                 ^^^^^^^^^^^^^^^^^^^^ this value is reassigned later and never used
 LL |     p = Point { x: 2, y: 2 };
    |     ------------------------ `p` is overwritten here before the previous value is read
 
 error: variable `foo` is assigned to, but never used
-  --> $DIR/unused-assign-148960.rs:38:9
+  --> $DIR/unused-assign-148960.rs:39:9
    |
 LL |     let mut foo = Foo;
    |         ^^^^^^^
@@ -52,7 +52,7 @@ LL +     let Foo = Foo;
    |
 
 error: value assigned to `foo` is never read
-  --> $DIR/unused-assign-148960.rs:39:5
+  --> $DIR/unused-assign-148960.rs:40:5
    |
 LL |     foo = Foo;
    |     ^^^

tests/ui/liveness/liveness-consts.rs

@@ -1,4 +1,5 @@
 //@ check-pass
+//@ ignore-parallel-frontend unstable liveness diagnostics
 #![warn(unused)]
 #![allow(unreachable_code)]
 

tests/ui/liveness/liveness-consts.stderr

@@ -1,38 +1,38 @@
 warning: unused variable: `e`
-  --> $DIR/liveness-consts.rs:26:13
+  --> $DIR/liveness-consts.rs:27:13
    |
 LL |         let e = 1;
    |             ^ help: if this is intentional, prefix it with an underscore: `_e`
    |
 note: the lint level is defined here
-  --> $DIR/liveness-consts.rs:2:9
+  --> $DIR/liveness-consts.rs:3:9
    |
 LL | #![warn(unused)]
    |         ^^^^^^
    = note: `#[warn(unused_variables)]` implied by `#[warn(unused)]`
 
 warning: unused variable: `s`
-  --> $DIR/liveness-consts.rs:35:24
+  --> $DIR/liveness-consts.rs:36:24
    |
 LL | pub fn f(x: [u8; { let s = 17; 100 }]) -> [u8;  { let z = 18; 100 }] {
    |                        ^ help: if this is intentional, prefix it with an underscore: `_s`
 
 warning: unused variable: `z`
-  --> $DIR/liveness-consts.rs:35:55
+  --> $DIR/liveness-consts.rs:36:55
    |
 LL | pub fn f(x: [u8; { let s = 17; 100 }]) -> [u8;  { let z = 18; 100 }] {
    |                                                       ^ help: if this is intentional, prefix it with an underscore: `_z`
 
 warning: variable `a` is assigned to, but never used
-  --> $DIR/liveness-consts.rs:7:9
+  --> $DIR/liveness-consts.rs:8:9
    |
 LL |     let mut a = 0;
    |         ^^^^^
    |
    = note: consider using `_a` instead
 
 warning: value assigned to `a` is never read
-  --> $DIR/liveness-consts.rs:11:9
+  --> $DIR/liveness-consts.rs:12:9
    |
 LL |         a += 1;
    |         ^^^^^^
@@ -41,37 +41,37 @@ LL |         a += 1;
    = note: `#[warn(unused_assignments)]` implied by `#[warn(unused)]`
 
 warning: value assigned to `b` is never read
-  --> $DIR/liveness-consts.rs:18:17
+  --> $DIR/liveness-consts.rs:19:17
    |
 LL |     let mut b = 1;
    |                 ^ this value is reassigned later and never used
 LL |     b += 1;
    |     ------ `b` is overwritten here before the previous value is read
 
 warning: value assigned to `b` is never read
-  --> $DIR/liveness-consts.rs:19:5
+  --> $DIR/liveness-consts.rs:20:5
    |
 LL |     b += 1;
    |     ^^^^^^ this value is reassigned later and never used
 LL |     b = 42;
    |     ------ `b` is overwritten here before the previous value is read
 
 warning: unused variable: `z`
-  --> $DIR/liveness-consts.rs:62:13
+  --> $DIR/liveness-consts.rs:63:13
    |
 LL |         let z = 42;
    |             ^ help: if this is intentional, prefix it with an underscore: `_z`
 
 warning: value assigned to `t` is never read
-  --> $DIR/liveness-consts.rs:44:9
+  --> $DIR/liveness-consts.rs:45:9
    |
 LL |         t = t + t;
    |         ^^^^^^^^^
    |
    = help: maybe it is overwritten before being read?
 
 warning: unused variable: `w`
-  --> $DIR/liveness-consts.rs:51:13
+  --> $DIR/liveness-consts.rs:52:13
    |
 LL |         let w = 10;
    |             ^ help: if this is intentional, prefix it with an underscore: `_w`

tests/ui/liveness/liveness-dead.rs

@@ -1,3 +1,4 @@
+//@ ignore-parallel-frontend unstable liveness diagnostics
 #![allow(dead_code)]
 #![deny(unused_assignments)]
 

tests/ui/liveness/liveness-dead.stderr

@@ -1,35 +1,35 @@
 error: value assigned to `x` is never read
-  --> $DIR/liveness-dead.rs:9:24
+  --> $DIR/liveness-dead.rs:10:24
    |
 LL |     let mut x: isize = 3;
    |                        ^ this value is reassigned later and never used
 LL |     x = 4;
    |     ----- `x` is overwritten here before the previous value is read
    |
 note: the lint level is defined here
-  --> $DIR/liveness-dead.rs:2:9
+  --> $DIR/liveness-dead.rs:3:9
    |
 LL | #![deny(unused_assignments)]
    |         ^^^^^^^^^^^^^^^^^^
 
 error: value assigned to `x` is never read
-  --> $DIR/liveness-dead.rs:17:5
+  --> $DIR/liveness-dead.rs:18:5
    |
 LL |     x = 4;
    |     ^^^^^
    |
    = help: maybe it is overwritten before being read?
 
 error: value passed to `x` is never read
-  --> $DIR/liveness-dead.rs:20:7
+  --> $DIR/liveness-dead.rs:21:7
    |
 LL | fn f4(mut x: i32) {
    |       ^^^^^
    |
    = help: maybe it is overwritten before being read?
 
 error: value assigned to `x` is never read
-  --> $DIR/liveness-dead.rs:27:5
+  --> $DIR/liveness-dead.rs:28:5
    |
 LL |     x = 4;
    |     ^^^^^

tests/ui/liveness/liveness-upvars.rs

@@ -1,5 +1,6 @@
 //@ edition:2018
 //@ check-pass
+//@ ignore-parallel-frontend unstable liveness diagnostics
 #![feature(coroutines, stmt_expr_attributes)]
 #![warn(unused)]
 #![allow(unreachable_code)]