Auto merge of #81718 - m-ou-se:rollup-3ftbymt, r=m-ou-se

Rollup of 5 pull requests

Successful merges:

 - #80394 (make const_err a future incompat lint)
 - #81532 (Remove incorrect `delay_span_bug`)
 - #81692 (Update clippy)
 - #81715 (Reduce tab formatting assertions to debug only)
 - #81716 (Fix non-existent-field ICE for generic fields.)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

compiler/rustc_errors/src/emitter.rs

@@ -645,7 +645,7 @@ impl EmitterWriter {
         margin: Margin,
     ) {
         // Tabs are assumed to have been replaced by spaces in calling code.
-        assert!(!source_string.contains('\t'));
+        debug_assert!(!source_string.contains('\t'));
         let line_len = source_string.len();
         // Create the source line we will highlight.
         let left = margin.left(line_len);

compiler/rustc_errors/src/styled_buffer.rs

@@ -15,7 +15,7 @@ impl StyledBuffer {
 
     pub fn render(&self) -> Vec<Vec<StyledString>> {
         // Tabs are assumed to have been replaced by spaces in calling code.
-        assert!(self.text.iter().all(|r| !r.contains(&'\t')));
+        debug_assert!(self.text.iter().all(|r| !r.contains(&'\t')));
 
         let mut output: Vec<Vec<StyledString>> = vec![];
         let mut styled_vec: Vec<StyledString> = vec![];