From 095a631718008a1534f7e4b575bef936f5bfe40f Mon Sep 17 00:00:00 2001
From: Brock <jbrockmendel@gmail.com>
Date: Mon, 2 Nov 2020 17:28:15 -0800
Subject: [PATCH] CI: troubleshoot win py38 builds

---
 pandas/_libs/tslibs/tzconversion.pyx | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pandas/_libs/tslibs/tzconversion.pyx b/pandas/_libs/tslibs/tzconversion.pyx
index 4c62b16d430bd..4a3fac1954ab7 100644
--- a/pandas/_libs/tslibs/tzconversion.pyx
+++ b/pandas/_libs/tslibs/tzconversion.pyx
@@ -500,9 +500,11 @@ cdef int64_t[:] _tz_convert_from_utc(const int64_t[:] vals, tzinfo tz):
     return converted
 
 
+# OSError may be thrown by tzlocal on windows at or close to 1970-01-01
+#  see https://github.com/pandas-dev/pandas/pull/37591#issuecomment-720628241
 cdef inline int64_t _tzlocal_get_offset_components(int64_t val, tzinfo tz,
                                                    bint to_utc,
-                                                   bint *fold=NULL):
+                                                   bint *fold=NULL) except? -1:
     """
     Calculate offset in nanoseconds needed to convert the i8 representation of
     a datetime from a tzlocal timezone to UTC, or vice-versa.