feat(proguard): Mark synthesized methods on frames

CHANGELOG.md

@@ -7,6 +7,11 @@
 - Bump `proguard` from v5.5.0 to v5.6.1
   This also bumps the proguard cache version from v3 to v4. ([#1734](https://github.com/getsentry/symbolicator/pull/1734))
 
+### Various fixes & improvements
+
+- Symbolicated JVM frames are now marked according to whether their method was
+  synthesized by the compiler. ([#1735](https://github.com/getsentry/symbolicator/pull/1735))
+
 ## 25.7.0
 
 ### Various fixes & improvements

crates/symbolicator-proguard/src/interface.rs

@@ -103,6 +103,14 @@ pub struct JvmFrame {
     /// instead of using line numbers.
     #[serde(skip_serializing_if = "Option::is_none")]
     pub signature: Option<String>,
+
+    /// Whether this frame's method was synthesized by the compiler.
+    #[serde(default, skip_serializing_if = "is_false")]
+    pub method_synthesized: bool,
+}
+
+fn is_false(b: &bool) -> bool {
+    !*b
 }
 
 /// An exception in a JVM event.

crates/symbolicator-proguard/src/symbolication.rs

@@ -373,6 +373,7 @@ impl ProguardService {
                         .file()
                         .map(String::from)
                         .or_else(|| original_frame.filename.clone()),
+                    method_synthesized: new_frame.method_synthesized(),
                     ..original_frame.clone()
                 };
 
@@ -877,6 +878,7 @@ y.b -> y.b:
                 abs_path: Some("CustomThreadFactory".into()),
                 filename: Some("CustomThreadFactory".into()),
                 index: 0,
+                method_synthesized: true,
                 ..Default::default()
             }
         );

crates/symbolicator-proguard/tests/integration/snapshots/integration__proguard__source_lookup_with_proguard.snap

@@ -102,6 +102,7 @@ stacktraces:
         lineno: 0
         in_app: true
         index: 18
+        method_synthesized: true
       - function: onCreate$lambda-1
         module: io.sentry.samples.instrumentation.ui.EditActivity
         lineno: 37