always print backtrace when CTFE_BACKTRACE is set

RalfJung · RalfJung · commit 5903fdb28184 · 2018-10-28T11:33:33.000+01:00
No point in making the user also enable RUST_LOG
diff --git a/src/librustc/mir/interpret/error.rs b/src/librustc/mir/interpret/error.rs
@@ -158,7 +158,7 @@ pub struct EvalError<'tcx> {
 impl<'tcx> EvalError<'tcx> {
     pub fn print_backtrace(&mut self) {
         if let Some(ref mut backtrace) = self.backtrace {
-            error!("{}", print_backtrace(&mut *backtrace));
+            eprintln!("{}", print_backtrace(&mut *backtrace));
         }
     }
 }
@@ -206,7 +206,7 @@ impl<'tcx> From<EvalErrorKind<'tcx, u64>> for EvalError<'tcx> {
 
                 if val == "immediate" {
                     // Print it now
-                    error!("{}", print_backtrace(&mut backtrace));
+                    eprintln!("{}", print_backtrace(&mut backtrace));
                     None
                 } else {
                     Some(Box::new(backtrace))

Original file line number	Diff line number	Diff line change
`@@ -158,7 +158,7 @@ pub struct EvalError<'tcx> {`
`158`	`158`	`impl<'tcx> EvalError<'tcx> {`
`159`	`159`	`pub fn print_backtrace(&mut self) {`
`160`	`160`	`if let Some(ref mut backtrace) = self.backtrace {`
`161`		`- error!("{}", print_backtrace(&mut *backtrace));`
	`161`	`+ eprintln!("{}", print_backtrace(&mut *backtrace));`
`162`	`162`	`}`
`163`	`163`	`}`
`164`	`164`	`}`
`@@ -206,7 +206,7 @@ impl<'tcx> From<EvalErrorKind<'tcx, u64>> for EvalError<'tcx> {`
`206`	`206`
`207`	`207`	`if val == "immediate" {`
`208`	`208`	`// Print it now`
`209`		`- error!("{}", print_backtrace(&mut backtrace));`
	`209`	`+ eprintln!("{}", print_backtrace(&mut backtrace));`
`210`	`210`	`None`
`211`	`211`	`} else {`
`212`	`212`	`Some(Box::new(backtrace))`