add a test

tests/testsuite/update.rs

@@ -391,6 +391,59 @@ fn update_precise() {
         .run();
 }
 
+#[cargo_test]
+fn update_precise_mismatched() {
+    Package::new("serde", "1.2.0").publish();
+    Package::new("serde", "1.2.1").publish();
+    Package::new("serde", "1.6.0").publish();
+
+    let p = project()
+        .file(
+            "Cargo.toml",
+            r#"
+                [package]
+                name = "bar"
+                version = "0.0.1"
+                authors = []
+
+                [dependencies]
+                serde = "~1.2"
+            "#,
+        )
+        .file("src/lib.rs", "")
+        .build();
+
+    p.cargo("check").run();
+
+    // `1.6.0` does not match `"~1.2"`
+    p.cargo("update serde:1.2 --precise 1.6.0")
+        // This terrible error message was a regression in #12749
+        .with_stderr(
+            "\
+[UPDATING] `[..]` index
+thread 'main' panicked at src/cargo/util/semver_ext.rs:79:9:
+cannot update_precise ~1.2 to 1.6.0
+[..]
+",
+        )
+        .with_status(101)
+        .run();
+
+    // `1.9.0` does not exist
+    p.cargo("update serde:1.2 --precise 1.9.0")
+        // This terrible error message has been the same for a long time. A fix is more than welcome!
+        .with_stderr(
+            "\
+    [UPDATING] `[..]` index
+    [ERROR] no matching package named `serde` found
+    location searched: registry `crates-io`
+    required by package `bar v0.0.1 ([..]/foo)`
+    ",
+        )
+        .with_status(101)
+        .run();
+}
+
 #[cargo_test]
 fn update_precise_build_metadata() {
     Package::new("serde", "0.0.1+first").publish();