Rollup merge of #55412 - oli-obk:min_const_fn_ice, r=estebank

Fix an ICE in the min_const_fn analysis

fixes https://github.com/rust-lang/rust/issues/55395

cc @Centril

src/test/ui/consts/single_variant_match_ice.rs

@@ -0,0 +1,15 @@
+enum Foo {
+    Prob,
+}
+
+impl Foo {
+    pub const fn as_val(&self) -> u8 {
+        use self::Foo::*;
+
+        match *self {
+            Prob => 0x1, //~ ERROR `if`, `match`, `&&` and `||` are not stable in const fn
+        }
+    }
+}
+
+fn main() {}

src/test/ui/consts/single_variant_match_ice.stderr

@@ -0,0 +1,8 @@
+error: `if`, `match`, `&&` and `||` are not stable in const fn
+  --> $DIR/single_variant_match_ice.rs:10:13
+   |
+LL |             Prob => 0x1, //~ ERROR `if`, `match`, `&&` and `||` are not stable in const fn
+   |             ^^^^
+
+error: aborting due to previous error
+