Rollup merge of rust-lang#74750 - oli-obk:logging_and_test_cleanups, r=JohnTitor

Clean up some uses of logging in ui tests

The removed test can't possibly trigger anything today as we don't have logging in libstd.

The `exec-env` flag was mistakenly used for adding env vars to rustc invocations both in test and in the test suite and there were some accidental renames from RUST_LOG to RUSTC_LOG that I reverted.

Author: JohnTitor

src/test/ui/binding/func-arg-ref-pattern.rs

@@ -1,5 +1,4 @@
 // run-pass
-// exec-env:RUST_POISON_ON_FREE=1
 
 // Test argument patterns where we create refs to the inside of
 // boxes. Make sure that we don't free the box as we match the

src/test/ui/issues/issue-18075.rs

@@ -1,5 +1,5 @@
 // run-pass
-// exec-env:RUSTC_LOG=rustc::middle=debug
+// rustc-env:RUSTC_LOG=rustc::middle=debug
 
 fn main() {
     let b = 1isize;

src/test/ui/issues/issue-34932.rs

@@ -1,6 +1,5 @@
 // run-pass
 // compile-flags:--test
-// rustc-env:RUSTC_BOOTSTRAP_KEY=
 #![cfg(any())] // This test should be configured away
 #![feature(rustc_attrs)] // Test that this is allowed on stable/beta
 #![feature(iter_arith_traits)] // Test that this is not unused

src/test/ui/logging-only-prints-once.rs

@@ -1,7 +1,6 @@
 // run-pass
 // ignore-windows
 // ignore-emscripten no threads support
-// exec-env:RUSTC_LOG=debug
 
 use std::cell::Cell;
 use std::fmt;
@@ -19,10 +18,13 @@ impl fmt::Debug for Foo {
 }
 
 pub fn main() {
-    thread::spawn(move|| {
+    thread::spawn(move || {
         let mut f = Foo(Cell::new(0));
         println!("{:?}", f);
         let Foo(ref mut f) = f;
         assert_eq!(f.get(), 1);
-    }).join().ok().unwrap();
+    })
+    .join()
+    .ok()
+    .unwrap();
 }

src/test/ui/logging_before_rt_started.rs

@@ -1,5 +1,3 @@
-// rustc-env:RUST_NEW_ERROR_FORMAT
-
 #![feature(const_fn)]
 
 trait Foo {

src/test/ui/mismatched_types/const-fn-in-trait.rs

@@ -1,11 +1,11 @@
 error[E0379]: functions in traits cannot be declared const
-  --> $DIR/const-fn-in-trait.rs:7:5
+  --> $DIR/const-fn-in-trait.rs:5:5
    |
 LL |     const fn g();
    |     ^^^^^ functions in traits cannot be const
 
 error[E0379]: functions in traits cannot be declared const
-  --> $DIR/const-fn-in-trait.rs:11:5
+  --> $DIR/const-fn-in-trait.rs:9:5
    |
 LL |     const fn f() -> u32 { 22 }
    |     ^^^^^ functions in traits cannot be const

src/test/ui/mismatched_types/const-fn-in-trait.stderr

@@ -1,5 +1,3 @@
-// rustc-env:RUST_NEW_ERROR_FORMAT
-
 trait Foo {
     fn foo(x: u16);
     fn bar(&mut self, bar: &mut Bar);

src/test/ui/mismatched_types/trait-impl-fn-incompatibility.rs

@@ -1,5 +1,5 @@
 error[E0053]: method `foo` has an incompatible type for trait
-  --> $DIR/trait-impl-fn-incompatibility.rs:11:15
+  --> $DIR/trait-impl-fn-incompatibility.rs:9:15
    |
 LL |     fn foo(x: u16);
    |               --- type in trait
@@ -11,7 +11,7 @@ LL |     fn foo(x: i16) { }
               found fn pointer `fn(i16)`
 
 error[E0053]: method `bar` has an incompatible type for trait
-  --> $DIR/trait-impl-fn-incompatibility.rs:12:28
+  --> $DIR/trait-impl-fn-incompatibility.rs:10:28
    |
 LL |     fn bar(&mut self, bar: &mut Bar);
    |                            -------- type in trait

src/test/ui/mismatched_types/trait-impl-fn-incompatibility.stderr

@@ -2,7 +2,7 @@
 #![allow(unused_must_use)]
 #![allow(unused_mut)]
 // ignore-windows
-// exec-env:RUSTC_LOG=debug
+// exec-env:RUST_LOG=debug
 // ignore-emscripten no threads support
 
 // regression test for issue #10405, make sure we don't call println! too soon.
@@ -11,5 +11,5 @@ use std::thread::Builder;
 
 pub fn main() {
     let mut t = Builder::new();
-    t.spawn(move|| ());
+    t.spawn(move || ());
 }