Resolve barriers to changing column!() / line!() return type to u32 in #19284 . Address review comments in #21769 .

1 files changed, 8 insertions, 3 deletions

diff --git a/src/libcore/macros.rs b/src/libcore/macros.rs
index d02ed7c2538..92d50821592 100644
--- a/src/libcore/macros.rs
+++ b/src/libcore/macros.rs
@@ -15,8 +15,10 @@ macro_rules! panic {
         panic!("explicit panic")
     );
     ($msg:expr) => ({
-        static _MSG_FILE_LINE: (&'static str, &'static str, usize) =
-            ($msg, file!(), line!() as usize);
+        #[cfg(stage0)]
+        static _MSG_FILE_LINE: (&'static str, &'static str, usize) = ($msg, file!(), line!());
+        #[cfg(not(stage0))]
+        static _MSG_FILE_LINE: (&'static str, &'static str, u32) = ($msg, file!(), line!());
         ::core::panicking::panic(&_MSG_FILE_LINE)
     });
     ($fmt:expr, $($arg:tt)*) => ({
@@ -24,7 +26,10 @@ macro_rules! panic {
         // used inside a dead function. Just `#[allow(dead_code)]` is
         // insufficient, since the user may have
         // `#[forbid(dead_code)]` and which cannot be overridden.
-        static _FILE_LINE: (&'static str, usize) = (file!(), line!() as usize);
+        #[cfg(stage0)]
+        static _FILE_LINE: (&'static str, usize) = (file!(), line!());
+        #[cfg(not(stage0))]
+        static _FILE_LINE: (&'static str, u32) = (file!(), line!());
         ::core::panicking::panic_fmt(format_args!($fmt, $($arg)*), &_FILE_LINE)
     });
 }