Make the const_err lint deny-by-default

Author: oli-obk

src/librustc/lint/builtin.rs

@@ -27,7 +27,7 @@ declare_lint! {
 
 declare_lint! {
     pub CONST_ERR,
-    Warn,
+    Deny,
     "constant evaluation detected erroneous expression"
 }
 

src/test/compile-fail/array_const_index-0.rs

@@ -10,9 +10,8 @@
 
 const A: &'static [i32] = &[];
 const B: i32 = (&A)[1];
-//~^ ERROR constant evaluation error
-//~| index out of bounds: the len is 0 but the index is 1
-//~| WARN this constant cannot be used
+//~^ index out of bounds: the len is 0 but the index is 1
+//~| ERROR this constant cannot be used
 
 fn main() {
     let _ = B;

src/test/compile-fail/array_const_index-1.rs

@@ -10,9 +10,8 @@
 
 const A: [i32; 0] = [];
 const B: i32 = A[1];
-//~^ ERROR constant evaluation error
-//~| index out of bounds: the len is 0 but the index is 1
-//~| WARN this constant cannot be used
+//~^ index out of bounds: the len is 0 but the index is 1
+//~| ERROR this constant cannot be used
 
 fn main() {
     let _ = B;

src/test/compile-fail/const-slice-oob.rs

@@ -12,9 +12,8 @@
 
 const FOO: &'static[u32] = &[1, 2, 3];
 const BAR: u32 = FOO[5];
-//~^ ERROR constant evaluation error [E0080]
-//~| index out of bounds: the len is 3 but the index is 5
-//~| WARN this constant cannot be used
+//~^ index out of bounds: the len is 3 but the index is 5
+//~| ERROR this constant cannot be used
 
 fn main() {
     let _ = BAR;

src/test/compile-fail/eval-enum.rs

@@ -12,11 +12,11 @@ enum Test {
     DivZero = 1/0,
     //~^ attempt to divide by zero
     //~| ERROR constant evaluation error
-    //~| WARN constant evaluation error
+    //~| ERROR constant evaluation error
     RemZero = 1%0,
     //~^ attempt to calculate the remainder with a divisor of zero
     //~| ERROR constant evaluation error
-    //~| WARN constant evaluation error
+    //~| ERROR constant evaluation error
 }
 
 fn main() {}

src/test/incremental/warnings-reemitted.rs

@@ -13,6 +13,7 @@
 // compile-pass
 
 #![allow(warnings)]
+#![warn(const_err)]
 
 fn main() {
     255u8 + 1; //~ WARNING this expression will panic at run-time

src/test/run-fail/overflowing-add.rs

@@ -11,6 +11,8 @@
 // error-pattern:thread 'main' panicked at 'attempt to add with overflow'
 // compile-flags: -C debug-assertions
 
+#![allow(const_err)]
+
 fn main() {
     let _x = 200u8 + 200u8 + 200u8;
 }

src/test/run-fail/overflowing-mul.rs

@@ -11,6 +11,8 @@
 // error-pattern:thread 'main' panicked at 'attempt to multiply with overflow'
 // compile-flags: -C debug-assertions
 
+#![allow(const_err)]
+
 fn main() {
     let x = 200u8 * 4;
 }

src/test/run-fail/overflowing-neg.rs

@@ -11,6 +11,8 @@
 // error-pattern:thread 'main' panicked at 'attempt to negate with overflow'
 // compile-flags: -C debug-assertions
 
+#![allow(const_err)]
+
 fn main() {
     let _x = -std::i8::MIN;
 }

src/test/run-fail/overflowing-sub.rs

@@ -11,6 +11,8 @@
 // error-pattern:thread 'main' panicked at 'attempt to subtract with overflow'
 // compile-flags: -C debug-assertions
 
+#![allow(const_err)]
+
 fn main() {
     let _x = 42u8 - (42u8 + 1);
 }