fix(tmwebdriver): wrap master prints in safe_print to survive stdout revoke (closes #672)

[Kailigithub]

Summary

When the OS revokes the master process's stdout (observed on macOS as BrokenPipeError on every print()), the WebSocket connection to the Chrome extension drops within ~1 second of ext_ready, and web_scan falls back to a cached session list — the user sees historical tab data instead of the live browser state.

Mirror the safe_print pattern already used in ga.py by wrapping all 11 raw print() call sites in TMWebDriver.py with safe_print, which swallows BrokenPipeError and lets the WebSocket read loop keep serving the extension.

Changes

• TMWebDriver.py:7-9 — define safe_print at module top (same body as ga.py:12-14)
• TMWebDriver.py:36,63,102,137,154,155,158,165,173,177,189,203,278,279,281 — replace print( with safe_print(

15-line source change in a single file. No public API change; no behavior change for callers when stdout is healthy.

Verification

• python3 -m py_compile TMWebDriver.py — passes

• Regression test: /tmp/test_issue_672_safe_print.py covers 6 cases:

  1. Normal safe_print call passes through to builtins.print
  2. BrokenPipeError from print is swallowed (matches the bug)
  3. Generic OSError is also swallowed (broader case)
  4. safe_print is defined in TMWebDriver.py with the expected body
  5. No raw print( call sites remain outside the def block
  6. ≥ 11 safe_print( call sites exist (the 11 that were raw print)

  Test fails on main (assertion: "def safe_print" in src returns False), passes with this fix. Confirmed via the git stash push / python3 / git stash pop three-step dance.

Related

• The exact safe_print body is taken from ga.py:12-14 — keeping the pattern consistent across modules.
• Issue bug: TMWebDriver master stdout 被 revoke → print() 抛 BrokenPipeError，导致扩展 WS 连接秒断、web_scan 读取历史脏数据 #672 includes a more elaborate suggested fix (os.dup2(devnull, sys.stdout.fileno())); I went with the simpler swallow-and-continue approach because the read loop recovers naturally once the next print returns silently, and matches the existing ga.py style.

Closes #672