Auto merge of #125960 - jieyouxu:rollup-1s7f6lr, r=jieyouxu

Rollup of 8 pull requests

Successful merges:

 - #124486 (Add tracking issue and unstable book page for `"vectorcall"` ABI)
 - #125504 (Change pedantically incorrect OnceCell/OnceLock wording)
 - #125608 (Avoid follow-up errors if the number of generic parameters already doesn't match)
 - #125690 (ARM Target Docs Update)
 - #125750 (Align `Term` methods with `GenericArg` methods, add `Term::expect_*`)
 - #125818 (Handle no values cfgs with `--print=check-cfg`)
 - #125909 (rustdoc: add a regression test for a former blanket impl synthesis ICE)
 - #125919 (Remove stray "this")

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

1 files changed, 11 insertions, 7 deletions

diff --git a/compiler/rustc_driver_impl/src/lib.rs b/compiler/rustc_driver_impl/src/lib.rs
index 08b97b4953e..627fd74c8d7 100644
--- a/compiler/rustc_driver_impl/src/lib.rs
+++ b/compiler/rustc_driver_impl/src/lib.rs
@@ -814,13 +814,17 @@ fn print_crate_info(
                     match expected_values {
                         ExpectedValues::Any => check_cfgs.push(format!("{name}=any()")),
                         ExpectedValues::Some(values) => {
-                            check_cfgs.extend(values.iter().map(|value| {
-                                if let Some(value) = value {
-                                    format!("{name}=\"{value}\"")
-                                } else {
-                                    name.to_string()
-                                }
-                            }))
+                            if !values.is_empty() {
+                                check_cfgs.extend(values.iter().map(|value| {
+                                    if let Some(value) = value {
+                                        format!("{name}=\"{value}\"")
+                                    } else {
+                                        name.to_string()
+                                    }
+                                }))
+                            } else {
+                                check_cfgs.push(format!("{name}="))
+                            }
                         }
                     }
                 }