Ignore colored_traceback error when TERM is unset (#2596)

* Ignore colored_traceback error when TERM is unset

Fixes using pwntools in non-interactive sage scripts with newer colored_traceback versions.

Fixes #2594

* Update CHANGELOG

Author: peace-maker

CHANGELOG.md

@@ -11,7 +11,7 @@ The table below shows which release corresponds to each branch, and what date th
 | ---------------- | -------- | ---------------------- |
 | [5.0.0](#500-dev)  | `dev`    |
 | [4.15.0](#4150-beta)  | `beta`   |
-| [4.14.0](#4141-stable)  | `stable` | Mar 24, 2025
+| [4.14.1](#4141-stable)  | `stable` | Mar 24, 2025
 | [4.14.0](#4140)  |          | Jan 15, 2025
 | [4.13.1](#4131)  |          | Sep 29, 2024
 | [4.13.0](#4130)  |          | Aug 12, 2024
@@ -149,13 +149,15 @@ The table below shows which release corresponds to each branch, and what date th
 - [#2595][2595] libcdb: Add Ubuntu and Debian debuginfod servers to default list
 - [#2593][2593] Use unicorn on macOS w/ SIP enabled
 - [#2587][2587] Support longer function names in Windows `getexport` shellcode
+- [#2596][2596] Ignore `colored_traceback` error when TERM envvar is unset
 
 [2545]: https://github.com/Gallopsled/pwntools/pull/2545
 [2567]: https://github.com/Gallopsled/pwntools/pull/2567
 [2576]: https://github.com/Gallopsled/pwntools/pull/2576
 [2595]: https://github.com/Gallopsled/pwntools/pull/2595
 [2593]: https://github.com/Gallopsled/pwntools/pull/2593
 [2587]: https://github.com/Gallopsled/pwntools/pull/2587
+[2596]: https://github.com/Gallopsled/pwntools/pull/2596
 
 ## 4.14.1 (`stable`)
 

pwn/toplevel.py

@@ -89,7 +89,15 @@
 except ImportError:
     pass
 else:
-    colored_traceback.add_hook()
+    try:
+        colored_traceback.add_hook()
+    except Exception:
+        # Exception: curses.error
+        # colored_traceback (curses.setupterm()) fails if TERM is unset.
+        # This is not critical, so we just ignore it.
+        # We cannot import `curses` for `curses.error` because it is not
+        # available on all platforms (e.g. Windows).
+        pass
 
 # Equivalence with the default behavior of "from import *"
 # __all__ = [x for x in tuple(globals()) if not x.startswith('_')]