gh-154326: Fix test_fsize_not_too_big() on Solaris (GH-154329)

https://github.com/python/cpython/commit/202c4c88ed5cb68ba41c54ad91e99c5585debdb4
commit: 202c4c88ed5cb68ba41c54ad91e99c5585debdb4
branch: main
author: Serhiy Storchaka <[email protected]>
committer: serhiy-storchaka <[email protected]>
date: 2026-07-21T06:39:44Z
summary:

gh-154326: Fix test_fsize_not_too_big() on Solaris (GH-154329)

Solaris silently converts resource limits that do not fit in a signed
64-bit integer to RLIM_INFINITY.

Co-authored-by: Claude Opus 4.8 <[email protected]>

files:
M Lib/test/test_resource.py

diff --git a/Lib/test/test_resource.py b/Lib/test/test_resource.py
index 6ea27c463f3148..97d2ae4e33c548 100644
--- a/Lib/test/test_resource.py
+++ b/Lib/test/test_resource.py
@@ -99,6 +99,11 @@ def expected(cur):
             # silently converted the limit value to RLIM_INFINITY.
             if sys.maxsize < 2**32 <= cur <= resource.RLIM_INFINITY:
                 return [(resource.RLIM_INFINITY, max), (cur, max)]
+            # Solaris silently converts limits that do not fit in a signed
+            # 64-bit integer to RLIM_INFINITY.
+            if cur >= 2**63-1:
+                return [(resource.RLIM_INFINITY, max),
+                        (min(cur, resource.RLIM_INFINITY), max)]
             return [(min(cur, resource.RLIM_INFINITY), max)]
 
         resource.setrlimit(resource.RLIMIT_FSIZE, (2**31-5, max))

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