diff --git a/bridge/native/test_rea_lldb_tracer.py b/bridge/native/test_rea_lldb_tracer.py
index b73c08b31..6672d9bc8 100644
--- a/bridge/native/test_rea_lldb_tracer.py
+++ b/bridge/native/test_rea_lldb_tracer.py
@@ -269,9 +269,23 @@ class NativeTraceBudgetTests(unittest.TestCase):
             def GetFileSpec(self):
                 return FileSpec()
 
+        class SourceFileSpec:
+            def IsValid(self):
+                return True
+
+            def __str__(self):
+                return source_path
+
         class Address:
             def GetLineEntry(self):
-                return types.SimpleNamespace(IsValid=lambda: False)
+                if source_path is None:
+                    return types.SimpleNamespace(IsValid=lambda: False)
+                return types.SimpleNamespace(
+                    IsValid=lambda: True,
+                    GetFileSpec=SourceFileSpec,
+                    GetLine=lambda: 15,
+                    GetColumn=lambda: 3,
+                )
 
             def GetModule(self):
                 return Module()
@@ -299,19 +313,35 @@ class NativeTraceBudgetTests(unittest.TestCase):
         breakpoint_count = 1000
         created = [[Breakpoint()] for _ in range(breakpoint_count)]
         config = {"breakpoints": [{"kind": "objc-method"}] * breakpoint_count}
-        report, locations_truncated = tracer._breakpoint_report(
-            object(), created, config
-        )
-        retained_bytes = sum(
-            len(json.dumps(location).encode("utf-8"))
-            + (1 if index > 0 else 0)
-            for row in report
-            for index, location in enumerate(row["locations"])
-        )
-        self.assertTrue(locations_truncated)
-        self.assertEqual(sum(row["location_count"] for row in report), 64_000)
-        self.assertLess(sum(len(row["locations"]) for row in report), 64_000)
-        self.assertLessEqual(retained_bytes, tracer.MAX_BREAKPOINT_LOCATION_BYTES)
+        for source_path in (None, "/tmp/" + "源🚀" * 3000 + "/calls.pas"):
+            with self.subTest(source_path_present=source_path is not None):
+                report, locations_truncated = tracer._breakpoint_report(
+                    object(), created, config
+                )
+                retained_bytes = sum(
+                    len(json.dumps(location).encode("utf-8"))
+                    + (1 if index > 0 else 0)
+                    for row in report
+                    for index, location in enumerate(row["locations"])
+                )
+                self.assertTrue(locations_truncated)
+                self.assertEqual(
+                    sum(row["location_count"] for row in report), 64_000
+                )
+                self.assertLess(
+                    sum(len(row["locations"]) for row in report), 64_000
+                )
+                self.assertLessEqual(
+                    retained_bytes, tracer.MAX_BREAKPOINT_LOCATION_BYTES
+                )
+                if source_path is not None:
+                    self.assertTrue(
+                        any(
+                            location["source_location"]["file_path"] == source_path
+                            for row in report
+                            for location in row["locations"]
+                        )
+                    )
 
 
 if __name__ == "__main__":
diff --git a/scripts/verify-native-pascal-calls.mjs b/scripts/verify-native-pascal-calls.mjs
index b1ef06d6a..62cc31daf 100644
--- a/scripts/verify-native-pascal-calls.mjs
+++ b/scripts/verify-native-pascal-calls.mjs
@@ -1,6 +1,6 @@
 import assert from "node:assert/strict";
 import { execFile } from "node:child_process";
-import { mkdtemp, rm } from "node:fs/promises";
+import { mkdtemp, readFile, rm } from "node:fs/promises";
 import { tmpdir } from "node:os";
 import { isAbsolute, join } from "node:path";
 import { fileURLToPath } from "node:url";
@@ -21,6 +21,16 @@ if (process.platform !== "darwin" || !isAbsolute(compiler ?? ""))
 const source = fileURLToPath(
   new URL("../tests/conformance/native/calls.pas", import.meta.url),
 );
+const fixtureLines = (await readFile(source, "utf8")).split(/\r?\n/u);
+const callerLines = new Set(
+  ["REA_VERIFY_CALLER_LOOP", "REA_VERIFY_CALLER_CALL"].map((marker) => {
+    const matches = fixtureLines.flatMap((line, index) =>
+      line.includes(marker) ? [index + 1] : [],
+    );
+    assert.equal(matches.length, 1, `fixture has one ${marker} marker`);
+    return matches[0];
+  }),
+);
 const directory = await mkdtemp(join(tmpdir(), "rea-pascal-calls-"));
 const input = {
   breakpoints: [{ kind: "function", name: "rea_pascal_call" }],
@@ -44,7 +54,7 @@ const inspect = (result) => {
     assert.equal(event.backtrace[0].source_location?.file_path, source);
     assert.equal(event.backtrace[0].module_path, join(directory, "calls"));
     assert.ok(
-      [14, 15].includes(event.backtrace[0].source_location.line),
+      callerLines.has(event.backtrace[0].source_location.line),
       "caller is the Pascal loop/call site",
     );
   }
@@ -69,10 +79,13 @@ const stable = (result) =>
   }));
 try {
   const version = (
-    await execute(compiler, ["-iV"], { timeout: 30_000 })
+    await execute(compiler, ["-iV"], { timeout: 30_000, killSignal: "SIGKILL" })
   ).stdout.trim();
   const architecture = (
-    await execute(compiler, ["-iTP"], { timeout: 30_000 })
+    await execute(compiler, ["-iTP"], {
+      timeout: 30_000,
+      killSignal: "SIGKILL",
+    })
   ).stdout.trim();
   await execute(
     compiler,
@@ -85,7 +98,7 @@ try {
       `-FU${directory}`,
       source,
     ],
-    { timeout: 120_000 },
+    { timeout: 120_000, killSignal: "SIGKILL" },
   );
   const binary = join(directory, "calls");
   const cli = await artifactCli(
diff --git a/tests/conformance/native/calls.pas b/tests/conformance/native/calls.pas
index d9d7f8855..c9ebe1d02 100644
--- a/tests/conformance/native/calls.pas
+++ b/tests/conformance/native/calls.pas
@@ -11,6 +11,6 @@ end;
 var
   Index: LongInt;
 begin
-  for Index := 0 to 2 do
-    ReaPascalCall(Index);
+  for Index := 0 to 2 do { REA_VERIFY_CALLER_LOOP }
+    ReaPascalCall(Index); { REA_VERIFY_CALLER_CALL }
 end.