Clean up diagnostics for arithmetic operation errors

compiler/rustc_middle/src/mir/mod.rs

@@ -1300,49 +1300,49 @@ impl<O> AssertKind<O> {
         match self {
             BoundsCheck { ref len, ref index } => write!(
                 f,
-                "\"index out of bounds: the len is {{}} but the index is {{}}\", {:?}, {:?}",
+                "\"index out of bounds: the length is {{}} but the index is {{}}\", {:?}, {:?}",
                 len, index
             ),
 
             OverflowNeg(op) => {
-                write!(f, "\"attempt to negate {{}} which would overflow\", {:?}", op)
+                write!(f, "\"attempt to negate `{{}}`, which would overflow\", {:?}", op)
             }
-            DivisionByZero(op) => write!(f, "\"attempt to divide {{}} by zero\", {:?}", op),
+            DivisionByZero(op) => write!(f, "\"attempt to divide `{{}}` by zero\", {:?}", op),
             RemainderByZero(op) => write!(
                 f,
-                "\"attempt to calculate the remainder of {{}} with a divisor of zero\", {:?}",
+                "\"attempt to calculate the remainder of `{{}}` with a divisor of zero\", {:?}",
                 op
             ),
             Overflow(BinOp::Add, l, r) => write!(
                 f,
-                "\"attempt to compute `{{}} + {{}}` which would overflow\", {:?}, {:?}",
+                "\"attempt to compute `{{}} + {{}}`, which would overflow\", {:?}, {:?}",
                 l, r
             ),
             Overflow(BinOp::Sub, l, r) => write!(
                 f,
-                "\"attempt to compute `{{}} - {{}}` which would overflow\", {:?}, {:?}",
+                "\"attempt to compute `{{}} - {{}}`, which would overflow\", {:?}, {:?}",
                 l, r
             ),
             Overflow(BinOp::Mul, l, r) => write!(
                 f,
-                "\"attempt to compute `{{}} * {{}}` which would overflow\", {:?}, {:?}",
+                "\"attempt to compute `{{}} * {{}}`, which would overflow\", {:?}, {:?}",
                 l, r
             ),
             Overflow(BinOp::Div, l, r) => write!(
                 f,
-                "\"attempt to compute `{{}} / {{}}` which would overflow\", {:?}, {:?}",
+                "\"attempt to compute `{{}} / {{}}`, which would overflow\", {:?}, {:?}",
                 l, r
             ),
             Overflow(BinOp::Rem, l, r) => write!(
                 f,
-                "\"attempt to compute the remainder of `{{}} % {{}}` which would overflow\", {:?}, {:?}",
+                "\"attempt to compute the remainder of `{{}} % {{}}`, which would overflow\", {:?}, {:?}",
                 l, r
             ),
             Overflow(BinOp::Shr, _, r) => {
-                write!(f, "\"attempt to shift right by {{}} which would overflow\", {:?}", r)
+                write!(f, "\"attempt to shift right by `{{}}`, which would overflow\", {:?}", r)
             }
             Overflow(BinOp::Shl, _, r) => {
-                write!(f, "\"attempt to shift left by {{}} which would overflow\", {:?}", r)
+                write!(f, "\"attempt to shift left by `{{}}`, which would overflow\", {:?}", r)
             }
             _ => write!(f, "\"{}\"", self.description()),
         }
@@ -1353,36 +1353,40 @@ impl<O: fmt::Debug> fmt::Debug for AssertKind<O> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         use AssertKind::*;
         match self {
-            BoundsCheck { ref len, ref index } => {
-                write!(f, "index out of bounds: the len is {:?} but the index is {:?}", len, index)
-            }
-            OverflowNeg(op) => write!(f, "attempt to negate {:#?} which would overflow", op),
-            DivisionByZero(op) => write!(f, "attempt to divide {:#?} by zero", op),
-            RemainderByZero(op) => {
-                write!(f, "attempt to calculate the remainder of {:#?} with a divisor of zero", op)
-            }
+            BoundsCheck { ref len, ref index } => write!(
+                f,
+                "index out of bounds: the length is {:?} but the index is {:?}",
+                len, index
+            ),
+            OverflowNeg(op) => write!(f, "attempt to negate `{:#?}`, which would overflow", op),
+            DivisionByZero(op) => write!(f, "attempt to divide `{:#?}` by zero", op),
+            RemainderByZero(op) => write!(
+                f,
+                "attempt to calculate the remainder of `{:#?}` with a divisor of zero",
+                op
+            ),
             Overflow(BinOp::Add, l, r) => {
-                write!(f, "attempt to compute `{:#?} + {:#?}` which would overflow", l, r)
+                write!(f, "attempt to compute `{:#?} + {:#?}`, which would overflow", l, r)
             }
             Overflow(BinOp::Sub, l, r) => {
-                write!(f, "attempt to compute `{:#?} - {:#?}` which would overflow", l, r)
+                write!(f, "attempt to compute `{:#?} - {:#?}`, which would overflow", l, r)
             }
             Overflow(BinOp::Mul, l, r) => {
-                write!(f, "attempt to compute `{:#?} * {:#?}` which would overflow", l, r)
+                write!(f, "attempt to compute `{:#?} * {:#?}`, which would overflow", l, r)
             }
             Overflow(BinOp::Div, l, r) => {
-                write!(f, "attempt to compute `{:#?} / {:#?}` which would overflow", l, r)
+                write!(f, "attempt to compute `{:#?} / {:#?}`, which would overflow", l, r)
             }
             Overflow(BinOp::Rem, l, r) => write!(
                 f,
-                "attempt to compute the remainder of `{:#?} % {:#?}` which would overflow",
+                "attempt to compute the remainder of `{:#?} % {:#?}`, which would overflow",
                 l, r
             ),
             Overflow(BinOp::Shr, _, r) => {
-                write!(f, "attempt to shift right by {:#?} which would overflow", r)
+                write!(f, "attempt to shift right by `{:#?}`, which would overflow", r)
             }
             Overflow(BinOp::Shl, _, r) => {
-                write!(f, "attempt to shift left by {:#?} which would overflow", r)
+                write!(f, "attempt to shift left by `{:#?}`, which would overflow", r)
             }
             _ => write!(f, "{}", self.description()),
         }

compiler/rustc_typeck/src/check/pat.rs

@@ -495,7 +495,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
             self.tcx.sess,
             span,
             E0029,
-            "only char and numeric types are allowed in range patterns"
+            "only `char` and numeric types are allowed in range patterns"
         );
         let msg = |ty| format!("this is of type `{}` but it should be `char` or numeric", ty);
         let mut one_side_err = |first_span, first_ty, second: Option<(bool, Ty<'tcx>, Span)>| {

src/test/mir-opt/array_index_is_temporary.main.SimplifyCfg-elaborate-drops.after.32bit.mir

@@ -48,7 +48,7 @@ fn main() -> () {
         _7 = _2;                         // scope 3 at $DIR/array-index-is-temporary.rs:16:7: 16:8
         _8 = Len(_1);                    // scope 3 at $DIR/array-index-is-temporary.rs:16:5: 16:9
         _9 = Lt(_7, _8);                 // scope 3 at $DIR/array-index-is-temporary.rs:16:5: 16:9
-        assert(move _9, "index out of bounds: the len is {} but the index is {}", move _8, _7) -> bb2; // scope 3 at $DIR/array-index-is-temporary.rs:16:5: 16:9
+        assert(move _9, "index out of bounds: the length is {} but the index is {}", move _8, _7) -> bb2; // scope 3 at $DIR/array-index-is-temporary.rs:16:5: 16:9
     }
 
     bb2: {

src/test/mir-opt/array_index_is_temporary.main.SimplifyCfg-elaborate-drops.after.64bit.mir

@@ -48,7 +48,7 @@ fn main() -> () {
         _7 = _2;                         // scope 3 at $DIR/array-index-is-temporary.rs:16:7: 16:8
         _8 = Len(_1);                    // scope 3 at $DIR/array-index-is-temporary.rs:16:5: 16:9
         _9 = Lt(_7, _8);                 // scope 3 at $DIR/array-index-is-temporary.rs:16:5: 16:9
-        assert(move _9, "index out of bounds: the len is {} but the index is {}", move _8, _7) -> bb2; // scope 3 at $DIR/array-index-is-temporary.rs:16:5: 16:9
+        assert(move _9, "index out of bounds: the length is {} but the index is {}", move _8, _7) -> bb2; // scope 3 at $DIR/array-index-is-temporary.rs:16:5: 16:9
     }
 
     bb2: {

src/test/mir-opt/combine_array_len.norm2.InstCombine.32bit.diff

@@ -32,7 +32,7 @@
 -         _4 = Len(_1);                    // scope 0 at $DIR/combine_array_len.rs:5:13: 5:17
 +         _4 = const 2_usize;              // scope 0 at $DIR/combine_array_len.rs:5:13: 5:17
           _5 = Lt(_3, _4);                 // scope 0 at $DIR/combine_array_len.rs:5:13: 5:17
-          assert(move _5, "index out of bounds: the len is {} but the index is {}", move _4, _3) -> bb1; // scope 0 at $DIR/combine_array_len.rs:5:13: 5:17
+          assert(move _5, "index out of bounds: the length is {} but the index is {}", move _4, _3) -> bb1; // scope 0 at $DIR/combine_array_len.rs:5:13: 5:17
       }
 
       bb1: {
@@ -44,7 +44,7 @@
 -         _8 = Len(_1);                    // scope 1 at $DIR/combine_array_len.rs:6:13: 6:17
 +         _8 = const 2_usize;              // scope 1 at $DIR/combine_array_len.rs:6:13: 6:17
           _9 = Lt(_7, _8);                 // scope 1 at $DIR/combine_array_len.rs:6:13: 6:17
-          assert(move _9, "index out of bounds: the len is {} but the index is {}", move _8, _7) -> bb2; // scope 1 at $DIR/combine_array_len.rs:6:13: 6:17
+          assert(move _9, "index out of bounds: the length is {} but the index is {}", move _8, _7) -> bb2; // scope 1 at $DIR/combine_array_len.rs:6:13: 6:17
       }
 
       bb2: {

src/test/mir-opt/combine_array_len.norm2.InstCombine.64bit.diff

@@ -32,7 +32,7 @@
 -         _4 = Len(_1);                    // scope 0 at $DIR/combine_array_len.rs:5:13: 5:17
 +         _4 = const 2_usize;              // scope 0 at $DIR/combine_array_len.rs:5:13: 5:17
           _5 = Lt(_3, _4);                 // scope 0 at $DIR/combine_array_len.rs:5:13: 5:17
-          assert(move _5, "index out of bounds: the len is {} but the index is {}", move _4, _3) -> bb1; // scope 0 at $DIR/combine_array_len.rs:5:13: 5:17
+          assert(move _5, "index out of bounds: the length is {} but the index is {}", move _4, _3) -> bb1; // scope 0 at $DIR/combine_array_len.rs:5:13: 5:17
       }
 
       bb1: {
@@ -44,7 +44,7 @@
 -         _8 = Len(_1);                    // scope 1 at $DIR/combine_array_len.rs:6:13: 6:17
 +         _8 = const 2_usize;              // scope 1 at $DIR/combine_array_len.rs:6:13: 6:17
           _9 = Lt(_7, _8);                 // scope 1 at $DIR/combine_array_len.rs:6:13: 6:17
-          assert(move _9, "index out of bounds: the len is {} but the index is {}", move _8, _7) -> bb2; // scope 1 at $DIR/combine_array_len.rs:6:13: 6:17
+          assert(move _9, "index out of bounds: the length is {} but the index is {}", move _8, _7) -> bb2; // scope 1 at $DIR/combine_array_len.rs:6:13: 6:17
       }
 
       bb2: {

src/test/mir-opt/const_prop/array_index.main.ConstProp.32bit.diff

@@ -20,9 +20,9 @@
           _3 = const 2_usize;              // scope 0 at $DIR/array_index.rs:5:31: 5:32
           _4 = const 4_usize;              // scope 0 at $DIR/array_index.rs:5:18: 5:33
 -         _5 = Lt(_3, _4);                 // scope 0 at $DIR/array_index.rs:5:18: 5:33
--         assert(move _5, "index out of bounds: the len is {} but the index is {}", move _4, _3) -> bb1; // scope 0 at $DIR/array_index.rs:5:18: 5:33
+-         assert(move _5, "index out of bounds: the length is {} but the index is {}", move _4, _3) -> bb1; // scope 0 at $DIR/array_index.rs:5:18: 5:33
 +         _5 = const true;                 // scope 0 at $DIR/array_index.rs:5:18: 5:33
-+         assert(const true, "index out of bounds: the len is {} but the index is {}", const 4_usize, const 2_usize) -> bb1; // scope 0 at $DIR/array_index.rs:5:18: 5:33
++         assert(const true, "index out of bounds: the length is {} but the index is {}", const 4_usize, const 2_usize) -> bb1; // scope 0 at $DIR/array_index.rs:5:18: 5:33
       }
 
       bb1: {

src/test/mir-opt/const_prop/array_index.main.ConstProp.64bit.diff

@@ -20,9 +20,9 @@
           _3 = const 2_usize;              // scope 0 at $DIR/array_index.rs:5:31: 5:32
           _4 = const 4_usize;              // scope 0 at $DIR/array_index.rs:5:18: 5:33
 -         _5 = Lt(_3, _4);                 // scope 0 at $DIR/array_index.rs:5:18: 5:33
--         assert(move _5, "index out of bounds: the len is {} but the index is {}", move _4, _3) -> bb1; // scope 0 at $DIR/array_index.rs:5:18: 5:33
+-         assert(move _5, "index out of bounds: the length is {} but the index is {}", move _4, _3) -> bb1; // scope 0 at $DIR/array_index.rs:5:18: 5:33
 +         _5 = const true;                 // scope 0 at $DIR/array_index.rs:5:18: 5:33
-+         assert(const true, "index out of bounds: the len is {} but the index is {}", const 4_usize, const 2_usize) -> bb1; // scope 0 at $DIR/array_index.rs:5:18: 5:33
++         assert(const true, "index out of bounds: the length is {} but the index is {}", const 4_usize, const 2_usize) -> bb1; // scope 0 at $DIR/array_index.rs:5:18: 5:33
       }
 
       bb1: {

src/test/mir-opt/const_prop/bad_op_div_by_zero.main.ConstProp.diff

@@ -24,21 +24,21 @@
           StorageLive(_3);                 // scope 1 at $DIR/bad_op_div_by_zero.rs:5:18: 5:19
 -         _3 = _1;                         // scope 1 at $DIR/bad_op_div_by_zero.rs:5:18: 5:19
 -         _4 = Eq(_3, const 0_i32);        // scope 1 at $DIR/bad_op_div_by_zero.rs:5:14: 5:19
--         assert(!move _4, "attempt to divide {} by zero", const 1_i32) -> bb1; // scope 1 at $DIR/bad_op_div_by_zero.rs:5:14: 5:19
+-         assert(!move _4, "attempt to divide `{}` by zero", const 1_i32) -> bb1; // scope 1 at $DIR/bad_op_div_by_zero.rs:5:14: 5:19
 +         _3 = const 0_i32;                // scope 1 at $DIR/bad_op_div_by_zero.rs:5:18: 5:19
 +         _4 = const true;                 // scope 1 at $DIR/bad_op_div_by_zero.rs:5:14: 5:19
-+         assert(!const true, "attempt to divide {} by zero", const 1_i32) -> bb1; // scope 1 at $DIR/bad_op_div_by_zero.rs:5:14: 5:19
++         assert(!const true, "attempt to divide `{}` by zero", const 1_i32) -> bb1; // scope 1 at $DIR/bad_op_div_by_zero.rs:5:14: 5:19
       }
 
       bb1: {
 -         _5 = Eq(_3, const -1_i32);       // scope 1 at $DIR/bad_op_div_by_zero.rs:5:14: 5:19
 -         _6 = Eq(const 1_i32, const i32::MIN); // scope 1 at $DIR/bad_op_div_by_zero.rs:5:14: 5:19
 -         _7 = BitAnd(move _5, move _6);   // scope 1 at $DIR/bad_op_div_by_zero.rs:5:14: 5:19
--         assert(!move _7, "attempt to compute `{} / {}` which would overflow", const 1_i32, _3) -> bb2; // scope 1 at $DIR/bad_op_div_by_zero.rs:5:14: 5:19
+-         assert(!move _7, "attempt to compute `{} / {}`, which would overflow", const 1_i32, _3) -> bb2; // scope 1 at $DIR/bad_op_div_by_zero.rs:5:14: 5:19
 +         _5 = const false;                // scope 1 at $DIR/bad_op_div_by_zero.rs:5:14: 5:19
 +         _6 = const false;                // scope 1 at $DIR/bad_op_div_by_zero.rs:5:14: 5:19
 +         _7 = const false;                // scope 1 at $DIR/bad_op_div_by_zero.rs:5:14: 5:19
-+         assert(!const false, "attempt to compute `{} / {}` which would overflow", const 1_i32, const 0_i32) -> bb2; // scope 1 at $DIR/bad_op_div_by_zero.rs:5:14: 5:19
++         assert(!const false, "attempt to compute `{} / {}`, which would overflow", const 1_i32, const 0_i32) -> bb2; // scope 1 at $DIR/bad_op_div_by_zero.rs:5:14: 5:19
       }
 
       bb2: {

src/test/mir-opt/const_prop/bad_op_mod_by_zero.main.ConstProp.diff

@@ -24,21 +24,21 @@
           StorageLive(_3);                 // scope 1 at $DIR/bad_op_mod_by_zero.rs:5:18: 5:19
 -         _3 = _1;                         // scope 1 at $DIR/bad_op_mod_by_zero.rs:5:18: 5:19
 -         _4 = Eq(_3, const 0_i32);        // scope 1 at $DIR/bad_op_mod_by_zero.rs:5:14: 5:19
--         assert(!move _4, "attempt to calculate the remainder of {} with a divisor of zero", const 1_i32) -> bb1; // scope 1 at $DIR/bad_op_mod_by_zero.rs:5:14: 5:19
+-         assert(!move _4, "attempt to calculate the remainder of `{}` with a divisor of zero", const 1_i32) -> bb1; // scope 1 at $DIR/bad_op_mod_by_zero.rs:5:14: 5:19
 +         _3 = const 0_i32;                // scope 1 at $DIR/bad_op_mod_by_zero.rs:5:18: 5:19
 +         _4 = const true;                 // scope 1 at $DIR/bad_op_mod_by_zero.rs:5:14: 5:19
-+         assert(!const true, "attempt to calculate the remainder of {} with a divisor of zero", const 1_i32) -> bb1; // scope 1 at $DIR/bad_op_mod_by_zero.rs:5:14: 5:19
++         assert(!const true, "attempt to calculate the remainder of `{}` with a divisor of zero", const 1_i32) -> bb1; // scope 1 at $DIR/bad_op_mod_by_zero.rs:5:14: 5:19
       }
 
       bb1: {
 -         _5 = Eq(_3, const -1_i32);       // scope 1 at $DIR/bad_op_mod_by_zero.rs:5:14: 5:19
 -         _6 = Eq(const 1_i32, const i32::MIN); // scope 1 at $DIR/bad_op_mod_by_zero.rs:5:14: 5:19
 -         _7 = BitAnd(move _5, move _6);   // scope 1 at $DIR/bad_op_mod_by_zero.rs:5:14: 5:19
--         assert(!move _7, "attempt to compute the remainder of `{} % {}` which would overflow", const 1_i32, _3) -> bb2; // scope 1 at $DIR/bad_op_mod_by_zero.rs:5:14: 5:19
+-         assert(!move _7, "attempt to compute the remainder of `{} % {}`, which would overflow", const 1_i32, _3) -> bb2; // scope 1 at $DIR/bad_op_mod_by_zero.rs:5:14: 5:19
 +         _5 = const false;                // scope 1 at $DIR/bad_op_mod_by_zero.rs:5:14: 5:19
 +         _6 = const false;                // scope 1 at $DIR/bad_op_mod_by_zero.rs:5:14: 5:19
 +         _7 = const false;                // scope 1 at $DIR/bad_op_mod_by_zero.rs:5:14: 5:19
-+         assert(!const false, "attempt to compute the remainder of `{} % {}` which would overflow", const 1_i32, const 0_i32) -> bb2; // scope 1 at $DIR/bad_op_mod_by_zero.rs:5:14: 5:19
++         assert(!const false, "attempt to compute the remainder of `{} % {}`, which would overflow", const 1_i32, const 0_i32) -> bb2; // scope 1 at $DIR/bad_op_mod_by_zero.rs:5:14: 5:19
       }
 
       bb2: {

src/test/mir-opt/const_prop/bad_op_unsafe_oob_for_slices.main.ConstProp.32bit.diff

@@ -42,9 +42,9 @@
           _6 = const 3_usize;              // scope 2 at $DIR/bad_op_unsafe_oob_for_slices.rs:7:23: 7:24
           _7 = Len((*_1));                 // scope 2 at $DIR/bad_op_unsafe_oob_for_slices.rs:7:18: 7:25
 -         _8 = Lt(_6, _7);                 // scope 2 at $DIR/bad_op_unsafe_oob_for_slices.rs:7:18: 7:25
--         assert(move _8, "index out of bounds: the len is {} but the index is {}", move _7, _6) -> bb1; // scope 2 at $DIR/bad_op_unsafe_oob_for_slices.rs:7:18: 7:25
+-         assert(move _8, "index out of bounds: the length is {} but the index is {}", move _7, _6) -> bb1; // scope 2 at $DIR/bad_op_unsafe_oob_for_slices.rs:7:18: 7:25
 +         _8 = Lt(const 3_usize, _7);      // scope 2 at $DIR/bad_op_unsafe_oob_for_slices.rs:7:18: 7:25
-+         assert(move _8, "index out of bounds: the len is {} but the index is {}", move _7, const 3_usize) -> bb1; // scope 2 at $DIR/bad_op_unsafe_oob_for_slices.rs:7:18: 7:25
++         assert(move _8, "index out of bounds: the length is {} but the index is {}", move _7, const 3_usize) -> bb1; // scope 2 at $DIR/bad_op_unsafe_oob_for_slices.rs:7:18: 7:25
       }
 
       bb1: {

src/test/mir-opt/const_prop/bad_op_unsafe_oob_for_slices.main.ConstProp.64bit.diff

@@ -42,9 +42,9 @@
           _6 = const 3_usize;              // scope 2 at $DIR/bad_op_unsafe_oob_for_slices.rs:7:23: 7:24
           _7 = Len((*_1));                 // scope 2 at $DIR/bad_op_unsafe_oob_for_slices.rs:7:18: 7:25
 -         _8 = Lt(_6, _7);                 // scope 2 at $DIR/bad_op_unsafe_oob_for_slices.rs:7:18: 7:25
--         assert(move _8, "index out of bounds: the len is {} but the index is {}", move _7, _6) -> bb1; // scope 2 at $DIR/bad_op_unsafe_oob_for_slices.rs:7:18: 7:25
+-         assert(move _8, "index out of bounds: the length is {} but the index is {}", move _7, _6) -> bb1; // scope 2 at $DIR/bad_op_unsafe_oob_for_slices.rs:7:18: 7:25
 +         _8 = Lt(const 3_usize, _7);      // scope 2 at $DIR/bad_op_unsafe_oob_for_slices.rs:7:18: 7:25
-+         assert(move _8, "index out of bounds: the len is {} but the index is {}", move _7, const 3_usize) -> bb1; // scope 2 at $DIR/bad_op_unsafe_oob_for_slices.rs:7:18: 7:25
++         assert(move _8, "index out of bounds: the length is {} but the index is {}", move _7, const 3_usize) -> bb1; // scope 2 at $DIR/bad_op_unsafe_oob_for_slices.rs:7:18: 7:25
       }
 
       bb1: {