fix negative range for short str

boozook · web-flow · commit e91e03824e7d · 2024-07-06T02:46:49.000+04:00
diff --git a/compiler/rustc_target/src/spec/mod.rs b/compiler/rustc_target/src/spec/mod.rs
@@ -3716,7 +3716,7 @@ impl TargetTriple {
         const EXT: &'static str = ".json";
         triple.as_ref().ends_with(EXT) || {
             let s = triple.as_ref();
-            s.get((s.len() - 5)..).map(|ext| ext.eq_ignore_ascii_case(EXT)).unwrap_or_default()
+            s.get(s.len().wrapping_sub(EXT.len())..).map(|ext| ext.eq_ignore_ascii_case(EXT)).unwrap_or_default()
         }
     }
 }

Original file line number	Diff line number	Diff line change
`@@ -3716,7 +3716,7 @@ impl TargetTriple {`
`3716`	`3716`	`const EXT: &'static str = ".json";`
`3717`	`3717`	`triple.as_ref().ends_with(EXT) \|\| {`
`3718`	`3718`	`let s = triple.as_ref();`
`3719`		`- s.get((s.len() - 5)..).map(\|ext\| ext.eq_ignore_ascii_case(EXT)).unwrap_or_default()`
	`3719`	`+ s.get(s.len().wrapping_sub(EXT.len())..).map(\|ext\| ext.eq_ignore_ascii_case(EXT)).unwrap_or_default()`
`3720`	`3720`	`}`
`3721`	`3721`	`}`
`3722`	`3722`	`}`