fix: decomp follow fails on a just-renamed symbol (stale name)

Right after a rename there's a window where the pseudocode cursor word is still
the OLD name while the symbol table already has the new one, so name-based decomp
follow (refs / resolve / _ref_on_line) all miss -> 'nothing to follow'. Disasm
never hit this because it falls back to an address xref.

Add the same address-based fallback to _follow_decomp: parse the line's /*0xEA*/
marker and follow a code xref from that statement — immune to a stale name.
Verified: with the old token 'sub_53D20' (renamed away) it still follows to the
right address. pilot suite 58/58.

2 files changed, 27 insertions, 0 deletions

diff --git a/idatui/app.py b/idatui/app.py
index b5bb5f2..702f59a 100644
--- a/idatui/app.py
+++ b/idatui/app.py
@@ -1347,6 +1347,14 @@ class IdaTui(App):
         if addr is None:
             addr = self._ref_on_line(line)
         if addr is None:
+            # Address-based fallback: use the line's /*0xEA*/ marker and follow a
+            # code xref from that statement. Immune to a stale name (e.g. right
+            # after a rename, before the pseudocode text catches up).
+            m = re.search(r"/\*\s*0x([0-9A-Fa-f]+)\s*\*/", line or "")
+            if m:
+                xr = self.program.xrefs_from(int(m.group(1), 16))
+                addr = next((x.to for x in xr if x.type == "code" and x.to), None)
+        if addr is None:
             self.app.call_from_thread(self._status, "nothing to follow on this line")
             return
         self._do_navigate(addr, push=True)
diff --git a/tests/test_tui.py b/tests/test_tui.py
index 0419842..f43c4a2 100644
--- a/tests/test_tui.py
+++ b/tests/test_tui.py
@@ -421,6 +421,25 @@ async def run(db):
                   dec.cursor == drow and dec.word_under_cursor() == dsym,
                   f"cursor={dec.cursor} (want {drow}) word={dec.word_under_cursor()!r}")
 
+            # Follow must still work when the name is stale (as right after a
+            # rename, before the pseudocode text catches up): the ea-marker
+            # fallback follows by address regardless of the (old) token.
+            dstale = app.program.resolve(dsym)
+            old_line = dec._texts[drow] if drow < len(dec._texts) else ""
+            if "/*0x" in old_line and dsym in old_line:
+                tmpname = f"stale_{os.getpid()}"
+                app.program.client.call(
+                    "rename", batch={"func": {"addr": hex(dstale), "name": tmpname}})
+                app.program.bump_names()
+                d2 = len(app._nav)
+                app._follow_decomp(old_line, dsym)  # dsym is now the OLD name
+                await wait_until(pilot, lambda: len(app._nav) > d2, timeout=25)
+                check("decomp follow works with a stale name (ea-marker fallback)",
+                      app._cur.ea == dstale, f"cur={app._cur.ea:#x} want={dstale:#x}")
+                app.program.client.call(
+                    "rename", batch={"func": {"addr": hex(dstale), "name": dsym}})
+                app.program.bump_names()
+
         # Column sort: click headers to sort by name / address.
         if app._filter_term:
             app._apply_filter("")