Don't use "if let" bindings to only check a value and not actually bind anything.

For example:  `if let Some(_) = foo() {}`	can be reduced to	`if foo().is_some() {}`   (clippy::redundant_pattern_matching)

1 files changed, 1 insertions, 1 deletions

diff --git a/src/librustc_codegen_llvm/back/write.rs b/src/librustc_codegen_llvm/back/write.rs
index a215ef81bc9..0c243128104 100644
--- a/src/librustc_codegen_llvm/back/write.rs
+++ b/src/librustc_codegen_llvm/back/write.rs
@@ -725,7 +725,7 @@ pub(crate) unsafe fn codegen(
                         Err(_) => return 0,
                     };
 
-                    if let Err(_) = write!(cursor, "{:#}", demangled) {
+                    if write!(cursor, "{:#}", demangled).is_err() {
                         // Possible only if provided buffer is not big enough
                         return 0;
                     }