6 files changed, 17 insertions, 17 deletions
diff --git a/sphinx/ext/autodoc/importer.py b/sphinx/ext/autodoc/importer.py
index cdccf710d..e5e84eda3 100644
--- a/sphinx/ext/autodoc/importer.py
+++ b/sphinx/ext/autodoc/importer.py
@@ -33,7 +33,7 @@ def import_module(modname: str, warningiserror: bool = False) -> Any:
     except BaseException as exc:
         # Importing modules may cause any side effects, including
         # SystemExit, so we need to catch all errors.
-        raise ImportError(exc, traceback.format_exc())
+        raise ImportError(exc, traceback.format_exc()) from exc
 
 
 def import_object(modname: str, objpath: List[str], objtype: str = '',
@@ -98,7 +98,7 @@ def import_object(modname: str, objpath: List[str], objtype: str = '',
             errmsg += '; the following exception was raised:\n%s' % traceback.format_exc()
 
         logger.debug(errmsg)
-        raise ImportError(errmsg)
+        raise ImportError(errmsg) from exc
 
 
 def get_module_members(module: Any) -> List[Tuple[str, Any]]:
diff --git a/sphinx/ext/autosummary/__init__.py b/sphinx/ext/autosummary/__init__.py
index 162b6868c..58e192bda 100644
--- a/sphinx/ext/autosummary/__init__.py
+++ b/sphinx/ext/autosummary/__init__.py
@@ -647,7 +647,7 @@ def _import_by_name(name: str) -> Tuple[Any, Any, str]:
         else:
             return sys.modules[modname], None, modname
     except (ValueError, ImportError, AttributeError, KeyError) as e:
-        raise ImportError(*e.args)
+        raise ImportError(*e.args) from e
 
 
 # -- :autolink: (smart default role) -------------------------------------------
diff --git a/sphinx/ext/graphviz.py b/sphinx/ext/graphviz.py
index c21868a6f..4a8dd0a4d 100644
--- a/sphinx/ext/graphviz.py
+++ b/sphinx/ext/graphviz.py
@@ -256,7 +256,7 @@ def render_dot(self: SphinxTranslator, code: str, options: Dict,
         return None, None
     except CalledProcessError as exc:
         raise GraphvizError(__('dot exited with error:\n[stderr]\n%r\n'
-                               '[stdout]\n%r') % (exc.stderr, exc.stdout))
+                               '[stdout]\n%r') % (exc.stderr, exc.stdout)) from exc
 
 
 def render_dot_html(self: HTMLTranslator, node: graphviz, code: str, options: Dict,
@@ -270,7 +270,7 @@ def render_dot_html(self: HTMLTranslator, node: graphviz, code: str, options: Di
         fname, outfn = render_dot(self, code, options, format, prefix)
     except GraphvizError as exc:
         logger.warning(__('dot code %r: %s'), code, exc)
-        raise nodes.SkipNode
+        raise nodes.SkipNode from exc
 
     classes = [imgcls, 'graphviz'] + node.get('classes', [])
     imgcls = ' '.join(filter(None, classes))
@@ -321,7 +321,7 @@ def render_dot_latex(self: LaTeXTranslator, node: graphviz, code: str,
         fname, outfn = render_dot(self, code, options, 'pdf', prefix)
     except GraphvizError as exc:
         logger.warning(__('dot code %r: %s'), code, exc)
-        raise nodes.SkipNode
+        raise nodes.SkipNode from exc
 
     is_inline = self.is_inline(node)
 
@@ -358,7 +358,7 @@ def render_dot_texinfo(self: TexinfoTranslator, node: graphviz, code: str,
         fname, outfn = render_dot(self, code, options, 'png', prefix)
     except GraphvizError as exc:
         logger.warning(__('dot code %r: %s'), code, exc)
-        raise nodes.SkipNode
+        raise nodes.SkipNode from exc
     if fname is not None:
         self.body.append('@image{%s,,,[graphviz],png}\n' % fname[:-4])
     raise nodes.SkipNode
diff --git a/sphinx/ext/imgconverter.py b/sphinx/ext/imgconverter.py
index bf4b9b9d1..dd13a9879 100644
--- a/sphinx/ext/imgconverter.py
+++ b/sphinx/ext/imgconverter.py
@@ -70,7 +70,7 @@ class ImagemagickConverter(ImageConverter):
         except CalledProcessError as exc:
             raise ExtensionError(__('convert exited with error:\n'
                                     '[stderr]\n%r\n[stdout]\n%r') %
-                                 (exc.stderr, exc.stdout))
+                                 (exc.stderr, exc.stdout)) from exc
 
 
 def setup(app: Sphinx) -> Dict[str, Any]:
diff --git a/sphinx/ext/imgmath.py b/sphinx/ext/imgmath.py
index 2050e470e..d11c5d7c5 100644
--- a/sphinx/ext/imgmath.py
+++ b/sphinx/ext/imgmath.py
@@ -165,13 +165,13 @@ def compile_math(latex: str, builder: Builder) -> str:
     try:
         subprocess.run(command, stdout=PIPE, stderr=PIPE, cwd=tempdir, check=True)
         return path.join(tempdir, 'math.dvi')
-    except OSError:
+    except OSError as exc:
         logger.warning(__('LaTeX command %r cannot be run (needed for math '
                           'display), check the imgmath_latex setting'),
                        builder.config.imgmath_latex)
-        raise InvokeError
+        raise InvokeError from exc
     except CalledProcessError as exc:
-        raise MathExtError('latex exited with error', exc.stderr, exc.stdout)
+        raise MathExtError('latex exited with error', exc.stderr, exc.stdout) from exc
 
 
 def convert_dvi_to_image(command: List[str], name: str) -> Tuple[bytes, bytes]:
@@ -179,13 +179,13 @@ def convert_dvi_to_image(command: List[str], name: str) -> Tuple[bytes, bytes]:
     try:
         ret = subprocess.run(command, stdout=PIPE, stderr=PIPE, check=True)
         return ret.stdout, ret.stderr
-    except OSError:
+    except OSError as exc:
         logger.warning(__('%s command %r cannot be run (needed for math '
                           'display), check the imgmath_%s setting'),
                        name, command[0], name)
-        raise InvokeError
+        raise InvokeError from exc
     except CalledProcessError as exc:
-        raise MathExtError('%s exited with error' % name, exc.stderr, exc.stdout)
+        raise MathExtError('%s exited with error' % name, exc.stderr, exc.stdout) from exc
 
 
 def convert_dvi_to_png(dvipath: str, builder: Builder) -> Tuple[str, int]:
@@ -326,7 +326,7 @@ def html_visit_math(self: HTMLTranslator, node: nodes.math) -> None:
                                   backrefs=[], source=node.astext())
         sm.walkabout(self)
         logger.warning(__('display latex %r: %s'), node.astext(), msg)
-        raise nodes.SkipNode
+        raise nodes.SkipNode from exc
     if fname is None:
         # something failed -- use text-only as a bad substitute
         self.body.append('<span class="math">%s</span>' %
@@ -352,7 +352,7 @@ def html_visit_displaymath(self: HTMLTranslator, node: nodes.math_block) -> None
                                   backrefs=[], source=node.astext())
         sm.walkabout(self)
         logger.warning(__('inline latex %r: %s'), node.astext(), msg)
-        raise nodes.SkipNode
+        raise nodes.SkipNode from exc
     self.body.append(self.starttag(node, 'div', CLASS='math'))
     self.body.append('<p>')
     if node['number']:
diff --git a/sphinx/ext/intersphinx.py b/sphinx/ext/intersphinx.py
index 02f605bac..a6c4ef694 100644
--- a/sphinx/ext/intersphinx.py
+++ b/sphinx/ext/intersphinx.py
@@ -179,7 +179,7 @@ def fetch_inventory(app: Sphinx, uri: str, inv: Any) -> Any:
                 join = path.join if localuri else posixpath.join
                 invdata = InventoryFile.load(f, uri, join)
             except ValueError as exc:
-                raise ValueError('unknown or unsupported inventory version: %r' % exc)
+                raise ValueError('unknown or unsupported inventory version: %r' % exc) from exc
     except Exception as err:
         err.args = ('intersphinx inventory %r not readable due to %s: %s',
                     inv, err.__class__.__name__, str(err))