[rustc.git] / src / test / ui / consts / const-eval / ub-upvars.stderr

error[E0080]: it is undefined behavior to use this value
  --> $DIR/ub-upvars.rs:5:1
   |
LL | / const BAD_UPVAR: &dyn FnOnce() = &{
LL | |     let bad_ref: &'static u16 = unsafe { mem::transmute(0usize) };
LL | |     let another_var = 13;
LL | |     move || { let _ = bad_ref; let _ = another_var; }
LL | | };
   | |__^ type validation failed: encountered a NULL reference at .<deref>.<dyn-downcast>.<captured-var(bad_ref)>
   |
   = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.

error: aborting due to previous error

For more information about this error, try `rustc --explain E0080`.
Commit	Line	Data
a1dfa0c6	1	error[E0080]: it is undefined behavior to use this value
f035d41b	2	--> $DIR/ub-upvars.rs:5:1
0bf4aa26	3	\|
dc9dc135	4	LL \| / const BAD_UPVAR: &dyn FnOnce() = &{
0bf4aa26 XL	5	LL \| \| let bad_ref: &'static u16 = unsafe { mem::transmute(0usize) };
	6	LL \| \| let another_var = 13;
	7	LL \| \| move \|\| { let _ = bad_ref; let _ = another_var; }
	8	LL \| \| };
74b04a01	9	\| \|__^ type validation failed: encountered a NULL reference at .<deref>.<dyn-downcast>.<captured-var(bad_ref)>
0bf4aa26	10	\|
e1599b0c	11	= note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
0bf4aa26 XL	12
	13	error: aborting due to previous error
	14
	15	For more information about this error, try `rustc --explain E0080`.