fix: raise chained errors with "from" #998

This makes exceptions report their causes correctly, as "The above exception was
the direct cause of the following exception" instead of "During handling of the
above exception, another exception occurred."

1 files changed, 5 insertions, 5 deletions

diff --git a/setup.py b/setup.py
index f6fb7b4e..1c540764 100644
--- a/setup.py
+++ b/setup.py
@@ -161,8 +161,8 @@ class ve_build_ext(build_ext):
         """Wrap `run` with `BuildFailed`."""
         try:
             build_ext.run(self)
-        except errors.DistutilsPlatformError:
-            raise BuildFailed()
+        except errors.DistutilsPlatformError as exc:
+            raise BuildFailed() from exc
 
     def build_extension(self, ext):
         """Wrap `build_extension` with `BuildFailed`."""
@@ -170,12 +170,12 @@ class ve_build_ext(build_ext):
             # Uncomment to test compile failure handling:
             #   raise errors.CCompilerError("OOPS")
             build_ext.build_extension(self, ext)
-        except ext_errors:
-            raise BuildFailed()
+        except ext_errors as exc:
+            raise BuildFailed() from exc
         except ValueError as err:
             # this can happen on Windows 64 bit, see Python issue 7511
             if "'path'" in str(err):    # works with both py 2/3
-                raise BuildFailed()
+                raise BuildFailed() from err
             raise
 
 # There are a few reasons we might not be able to compile the C extension.