diff --git a/plugins/axiomcode/skills/axiomcode/scripts/axiomcode-path b/plugins/axiomcode/skills/axiomcode/scripts/axiomcode-path
index 99210564..e719552e 100755
--- a/plugins/axiomcode/skills/axiomcode/scripts/axiomcode-path
+++ b/plugins/axiomcode/skills/axiomcode/scripts/axiomcode-path
@@ -997,6 +997,9 @@ class G:
             for r in rows: f.write('\t'.join(str(x) for x in r) + '\n')
         replace_file(tmp, p)
     def edges(self):
+        # exported here, not only by the verbs that call export(): `context` read edge.facts straight after `index`
+        # returned, while the build's warm-up was still writing it in the background, and died on a missing file
+        self.export()
         return [tuple(l.rstrip('\n').split('\t')) for l in open(os.path.join(self.facts, 'edge.facts'))] + list(self.EXTRA)
     def add_outside_call_edges(self):
         """THE HOPS NO CALL SITE EXPRESSES, as hops of this query (#1469). A gRPC client reaches the handler that serves
diff --git a/tests/run.py b/tests/run.py
index 863a7c06..772ba182 100755
--- a/tests/run.py
+++ b/tests/run.py
@@ -97,7 +97,9 @@ def print(*a, flush=False, **k): builtins.print(*a, file=buf, **k)
         if bad:
             fail += 1; print(f"FAIL {l}/{name}: {ch['why']}", flush=True)
             for b in bad: print(f"     missing/unwanted: {b}")
-            print('     ' + '\n     '.join(text.strip().split('\n')[:14]))
+            lines = text.strip().split('\n')
+            # a traceback's last line is the error itself: keep the head (what it answered) and the tail (why it stopped)
+            print('     ' + '\n     '.join(lines[:14] + (['…'] + lines[-12:] if len(lines) > 26 else lines[14:])))
         elif verbose: print(f"ok   {l}/{name}: {ch['why']}")
     if not keep: shutil.rmtree(os.path.join(path, '.axiomcode'), ignore_errors=True)
     return buf.getvalue(), tot, fail, pend