Ui tests with compile_error resolved at call site

test_suite/tests/ui/enum-representation/content-no-tag.stderr

@@ -1,5 +1,9 @@
 error: #[serde(tag = "...", content = "...")] must be used together
  --> tests/ui/enum-representation/content-no-tag.rs:4:9
   |
+3 | #[derive(Serialize)]
+  |          --------- in this derive macro expansion
 4 | #[serde(content = "c")]
   |         ^^^^^^^
+  |
+  = note: this error originates in the derive macro `Serialize` (in Nightly builds, run with -Z macro-backtrace for more info)

test_suite/tests/ui/enum-representation/internal-tuple-variant.stderr

@@ -1,5 +1,10 @@
 error: #[serde(tag = "...")] cannot be used with tuple variants
  --> tests/ui/enum-representation/internal-tuple-variant.rs:6:5
   |
+3 | #[derive(Serialize)]
+  |          --------- in this derive macro expansion
+...
 6 |     Tuple(u8, u8),
   |     ^^^^^^^^^^^^^
+  |
+  = note: this error originates in the derive macro `Serialize` (in Nightly builds, run with -Z macro-backtrace for more info)

test_suite/tests/ui/enum-representation/untagged-and-adjacent.stderr

@@ -1,17 +1,31 @@
 error: untagged enum cannot have #[serde(tag = "...", content = "...")]
  --> tests/ui/enum-representation/untagged-and-adjacent.rs:4:9
   |
+3 | #[derive(Serialize)]
+  |          --------- in this derive macro expansion
 4 | #[serde(untagged)]
   |         ^^^^^^^^
+  |
+  = note: this error originates in the derive macro `Serialize` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: untagged enum cannot have #[serde(tag = "...", content = "...")]
  --> tests/ui/enum-representation/untagged-and-adjacent.rs:5:9
   |
+3 | #[derive(Serialize)]
+  |          --------- in this derive macro expansion
+4 | #[serde(untagged)]
 5 | #[serde(tag = "t", content = "c")]
   |         ^^^
+  |
+  = note: this error originates in the derive macro `Serialize` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: untagged enum cannot have #[serde(tag = "...", content = "...")]
  --> tests/ui/enum-representation/untagged-and-adjacent.rs:5:20
   |
+3 | #[derive(Serialize)]
+  |          --------- in this derive macro expansion
+4 | #[serde(untagged)]
 5 | #[serde(tag = "t", content = "c")]
   |                    ^^^^^^^
+  |
+  = note: this error originates in the derive macro `Serialize` (in Nightly builds, run with -Z macro-backtrace for more info)

test_suite/tests/ui/enum-representation/untagged-and-content.stderr

@@ -1,11 +1,20 @@
 error: untagged enum cannot have #[serde(content = "...")]
  --> tests/ui/enum-representation/untagged-and-content.rs:4:9
   |
+3 | #[derive(Serialize)]
+  |          --------- in this derive macro expansion
 4 | #[serde(untagged)]
   |         ^^^^^^^^
+  |
+  = note: this error originates in the derive macro `Serialize` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: untagged enum cannot have #[serde(content = "...")]
  --> tests/ui/enum-representation/untagged-and-content.rs:5:9
   |
+3 | #[derive(Serialize)]
+  |          --------- in this derive macro expansion
+4 | #[serde(untagged)]
 5 | #[serde(content = "c")]
   |         ^^^^^^^
+  |
+  = note: this error originates in the derive macro `Serialize` (in Nightly builds, run with -Z macro-backtrace for more info)

test_suite/tests/ui/enum-representation/untagged-and-internal.stderr

@@ -1,11 +1,20 @@
 error: enum cannot be both untagged and internally tagged
  --> tests/ui/enum-representation/untagged-and-internal.rs:4:9
   |
+3 | #[derive(Serialize)]
+  |          --------- in this derive macro expansion
 4 | #[serde(untagged)]
   |         ^^^^^^^^
+  |
+  = note: this error originates in the derive macro `Serialize` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: enum cannot be both untagged and internally tagged
  --> tests/ui/enum-representation/untagged-and-internal.rs:5:9
   |
+3 | #[derive(Serialize)]
+  |          --------- in this derive macro expansion
+4 | #[serde(untagged)]
 5 | #[serde(tag = "type")]
   |         ^^^
+  |
+  = note: this error originates in the derive macro `Serialize` (in Nightly builds, run with -Z macro-backtrace for more info)

test_suite/tests/ui/enum-representation/untagged-struct.stderr

@@ -1,5 +1,10 @@
 error: #[serde(untagged)] can only be used on enums
  --> tests/ui/enum-representation/untagged-struct.rs:5:1
   |
+3 | #[derive(Serialize)]
+  |          --------- in this derive macro expansion
+4 | #[serde(untagged)]
 5 | struct S;
   | ^^^^^^
+  |
+  = note: this error originates in the derive macro `Serialize` (in Nightly builds, run with -Z macro-backtrace for more info)