diff --git a/spec/libsass-closed-issues/issue_1432/is-superselector/expected.compact.css b/spec/libsass-closed-issues/issue_1432/is-superselector/expected.compact.css
new file mode 100644
index 0000000000..fc089a4ccb
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/is-superselector/expected.compact.css
@@ -0,0 +1,3 @@
+Error: $sub: null is not a valid selector: it must be a string,
+       a list of strings, or a list of lists of strings for `is-superselector'
+        on line 1 of test.scss
diff --git a/spec/libsass-closed-issues/issue_1432/is-superselector/expected.compressed.css b/spec/libsass-closed-issues/issue_1432/is-superselector/expected.compressed.css
new file mode 100644
index 0000000000..fc089a4ccb
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/is-superselector/expected.compressed.css
@@ -0,0 +1,3 @@
+Error: $sub: null is not a valid selector: it must be a string,
+       a list of strings, or a list of lists of strings for `is-superselector'
+        on line 1 of test.scss
diff --git a/spec/libsass-closed-issues/issue_1432/is-superselector/expected.expanded.css b/spec/libsass-closed-issues/issue_1432/is-superselector/expected.expanded.css
new file mode 100644
index 0000000000..fc089a4ccb
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/is-superselector/expected.expanded.css
@@ -0,0 +1,3 @@
+Error: $sub: null is not a valid selector: it must be a string,
+       a list of strings, or a list of lists of strings for `is-superselector'
+        on line 1 of test.scss
diff --git a/spec/libsass-closed-issues/issue_1432/is-superselector/expected_output.css b/spec/libsass-closed-issues/issue_1432/is-superselector/expected_output.css
new file mode 100644
index 0000000000..fc089a4ccb
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/is-superselector/expected_output.css
@@ -0,0 +1,3 @@
+Error: $sub: null is not a valid selector: it must be a string,
+       a list of strings, or a list of lists of strings for `is-superselector'
+        on line 1 of test.scss
diff --git a/spec/libsass-closed-issues/issue_1432/is-superselector/input.scss b/spec/libsass-closed-issues/issue_1432/is-superselector/input.scss
new file mode 100644
index 0000000000..4e414fede1
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/is-superselector/input.scss
@@ -0,0 +1 @@
+@debug(is-superselector("foo", null));
diff --git a/spec/libsass-closed-issues/issue_1432/selector-append/expected.compact.css b/spec/libsass-closed-issues/issue_1432/selector-append/expected.compact.css
new file mode 100644
index 0000000000..60c17a819a
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/selector-append/expected.compact.css
@@ -0,0 +1,3 @@
+Error: $selectors: null is not a valid selector: it must be a string,
+       a list of strings, or a list of lists of strings for `selector-append'
+        on line 1 of test.scss
diff --git a/spec/libsass-closed-issues/issue_1432/selector-append/expected.compressed.css b/spec/libsass-closed-issues/issue_1432/selector-append/expected.compressed.css
new file mode 100644
index 0000000000..60c17a819a
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/selector-append/expected.compressed.css
@@ -0,0 +1,3 @@
+Error: $selectors: null is not a valid selector: it must be a string,
+       a list of strings, or a list of lists of strings for `selector-append'
+        on line 1 of test.scss
diff --git a/spec/libsass-closed-issues/issue_1432/selector-append/expected.expanded.css b/spec/libsass-closed-issues/issue_1432/selector-append/expected.expanded.css
new file mode 100644
index 0000000000..60c17a819a
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/selector-append/expected.expanded.css
@@ -0,0 +1,3 @@
+Error: $selectors: null is not a valid selector: it must be a string,
+       a list of strings, or a list of lists of strings for `selector-append'
+        on line 1 of test.scss
diff --git a/spec/libsass-closed-issues/issue_1432/selector-append/expected_output.css b/spec/libsass-closed-issues/issue_1432/selector-append/expected_output.css
new file mode 100644
index 0000000000..60c17a819a
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/selector-append/expected_output.css
@@ -0,0 +1,3 @@
+Error: $selectors: null is not a valid selector: it must be a string,
+       a list of strings, or a list of lists of strings for `selector-append'
+        on line 1 of test.scss
diff --git a/spec/libsass-closed-issues/issue_1432/selector-append/input.scss b/spec/libsass-closed-issues/issue_1432/selector-append/input.scss
new file mode 100644
index 0000000000..6f044758e7
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/selector-append/input.scss
@@ -0,0 +1 @@
+@debug(selector-append("foo", null));
diff --git a/spec/libsass-closed-issues/issue_1432/selector-extend/expected.compact.css b/spec/libsass-closed-issues/issue_1432/selector-extend/expected.compact.css
new file mode 100644
index 0000000000..759161d3ad
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/selector-extend/expected.compact.css
@@ -0,0 +1,3 @@
+Error: $extender: null is not a valid selector: it must be a string,
+       a list of strings, or a list of lists of strings for `selector-extend'
+        on line 1 of test.scss
diff --git a/spec/libsass-closed-issues/issue_1432/selector-extend/expected.compressed.css b/spec/libsass-closed-issues/issue_1432/selector-extend/expected.compressed.css
new file mode 100644
index 0000000000..759161d3ad
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/selector-extend/expected.compressed.css
@@ -0,0 +1,3 @@
+Error: $extender: null is not a valid selector: it must be a string,
+       a list of strings, or a list of lists of strings for `selector-extend'
+        on line 1 of test.scss
diff --git a/spec/libsass-closed-issues/issue_1432/selector-extend/expected.expanded.css b/spec/libsass-closed-issues/issue_1432/selector-extend/expected.expanded.css
new file mode 100644
index 0000000000..759161d3ad
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/selector-extend/expected.expanded.css
@@ -0,0 +1,3 @@
+Error: $extender: null is not a valid selector: it must be a string,
+       a list of strings, or a list of lists of strings for `selector-extend'
+        on line 1 of test.scss
diff --git a/spec/libsass-closed-issues/issue_1432/selector-extend/expected_output.css b/spec/libsass-closed-issues/issue_1432/selector-extend/expected_output.css
new file mode 100644
index 0000000000..759161d3ad
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/selector-extend/expected_output.css
@@ -0,0 +1,3 @@
+Error: $extender: null is not a valid selector: it must be a string,
+       a list of strings, or a list of lists of strings for `selector-extend'
+        on line 1 of test.scss
diff --git a/spec/libsass-closed-issues/issue_1432/selector-extend/input.scss b/spec/libsass-closed-issues/issue_1432/selector-extend/input.scss
new file mode 100644
index 0000000000..bf3c8e37a4
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/selector-extend/input.scss
@@ -0,0 +1 @@
+@debug(selector-extend(".a .b", ".b", null));
diff --git a/spec/libsass-closed-issues/issue_1432/selector-nest/expected.compact.css b/spec/libsass-closed-issues/issue_1432/selector-nest/expected.compact.css
new file mode 100644
index 0000000000..20b38a6cfc
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/selector-nest/expected.compact.css
@@ -0,0 +1,3 @@
+Error: $selectors: null is not a valid selector: it must be a string,
+       a list of strings, or a list of lists of strings for `selector-nest'
+        on line 1 of test.scss
diff --git a/spec/libsass-closed-issues/issue_1432/selector-nest/expected.compressed.css b/spec/libsass-closed-issues/issue_1432/selector-nest/expected.compressed.css
new file mode 100644
index 0000000000..20b38a6cfc
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/selector-nest/expected.compressed.css
@@ -0,0 +1,3 @@
+Error: $selectors: null is not a valid selector: it must be a string,
+       a list of strings, or a list of lists of strings for `selector-nest'
+        on line 1 of test.scss
diff --git a/spec/libsass-closed-issues/issue_1432/selector-nest/expected.expanded.css b/spec/libsass-closed-issues/issue_1432/selector-nest/expected.expanded.css
new file mode 100644
index 0000000000..20b38a6cfc
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/selector-nest/expected.expanded.css
@@ -0,0 +1,3 @@
+Error: $selectors: null is not a valid selector: it must be a string,
+       a list of strings, or a list of lists of strings for `selector-nest'
+        on line 1 of test.scss
diff --git a/spec/libsass-closed-issues/issue_1432/selector-nest/expected_output.css b/spec/libsass-closed-issues/issue_1432/selector-nest/expected_output.css
new file mode 100644
index 0000000000..20b38a6cfc
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/selector-nest/expected_output.css
@@ -0,0 +1,3 @@
+Error: $selectors: null is not a valid selector: it must be a string,
+       a list of strings, or a list of lists of strings for `selector-nest'
+        on line 1 of test.scss
diff --git a/spec/libsass-closed-issues/issue_1432/selector-nest/input.scss b/spec/libsass-closed-issues/issue_1432/selector-nest/input.scss
new file mode 100644
index 0000000000..eabca1d647
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/selector-nest/input.scss
@@ -0,0 +1 @@
+@debug(selector-nest("foo", null));
diff --git a/spec/libsass-closed-issues/issue_1432/selector-parse/expected.compact.css b/spec/libsass-closed-issues/issue_1432/selector-parse/expected.compact.css
new file mode 100644
index 0000000000..29dcaa0fcd
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/selector-parse/expected.compact.css
@@ -0,0 +1,3 @@
+Error: $selector: null is not a valid selector: it must be a string,
+       a list of strings, or a list of lists of strings for `selector-parse'
+        on line 1 of test.scss
diff --git a/spec/libsass-closed-issues/issue_1432/selector-parse/expected.compressed.css b/spec/libsass-closed-issues/issue_1432/selector-parse/expected.compressed.css
new file mode 100644
index 0000000000..29dcaa0fcd
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/selector-parse/expected.compressed.css
@@ -0,0 +1,3 @@
+Error: $selector: null is not a valid selector: it must be a string,
+       a list of strings, or a list of lists of strings for `selector-parse'
+        on line 1 of test.scss
diff --git a/spec/libsass-closed-issues/issue_1432/selector-parse/expected.expanded.css b/spec/libsass-closed-issues/issue_1432/selector-parse/expected.expanded.css
new file mode 100644
index 0000000000..29dcaa0fcd
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/selector-parse/expected.expanded.css
@@ -0,0 +1,3 @@
+Error: $selector: null is not a valid selector: it must be a string,
+       a list of strings, or a list of lists of strings for `selector-parse'
+        on line 1 of test.scss
diff --git a/spec/libsass-closed-issues/issue_1432/selector-parse/expected_output.css b/spec/libsass-closed-issues/issue_1432/selector-parse/expected_output.css
new file mode 100644
index 0000000000..29dcaa0fcd
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/selector-parse/expected_output.css
@@ -0,0 +1,3 @@
+Error: $selector: null is not a valid selector: it must be a string,
+       a list of strings, or a list of lists of strings for `selector-parse'
+        on line 1 of test.scss
diff --git a/spec/libsass-closed-issues/issue_1432/selector-parse/input.scss b/spec/libsass-closed-issues/issue_1432/selector-parse/input.scss
new file mode 100644
index 0000000000..f337fb55aa
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/selector-parse/input.scss
@@ -0,0 +1 @@
+@debug(selector-parse(null));
diff --git a/spec/libsass-closed-issues/issue_1432/selector-replace/expected.compact.css b/spec/libsass-closed-issues/issue_1432/selector-replace/expected.compact.css
new file mode 100644
index 0000000000..3f6ed9d075
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/selector-replace/expected.compact.css
@@ -0,0 +1,3 @@
+Error: $replacement: null is not a valid selector: it must be a string,
+       a list of strings, or a list of lists of strings for `selector-replace'
+        on line 1 of test.scss
diff --git a/spec/libsass-closed-issues/issue_1432/selector-replace/expected.compressed.css b/spec/libsass-closed-issues/issue_1432/selector-replace/expected.compressed.css
new file mode 100644
index 0000000000..3f6ed9d075
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/selector-replace/expected.compressed.css
@@ -0,0 +1,3 @@
+Error: $replacement: null is not a valid selector: it must be a string,
+       a list of strings, or a list of lists of strings for `selector-replace'
+        on line 1 of test.scss
diff --git a/spec/libsass-closed-issues/issue_1432/selector-replace/expected.expanded.css b/spec/libsass-closed-issues/issue_1432/selector-replace/expected.expanded.css
new file mode 100644
index 0000000000..3f6ed9d075
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/selector-replace/expected.expanded.css
@@ -0,0 +1,3 @@
+Error: $replacement: null is not a valid selector: it must be a string,
+       a list of strings, or a list of lists of strings for `selector-replace'
+        on line 1 of test.scss
diff --git a/spec/libsass-closed-issues/issue_1432/selector-replace/expected_output.css b/spec/libsass-closed-issues/issue_1432/selector-replace/expected_output.css
new file mode 100644
index 0000000000..3f6ed9d075
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/selector-replace/expected_output.css
@@ -0,0 +1,3 @@
+Error: $replacement: null is not a valid selector: it must be a string,
+       a list of strings, or a list of lists of strings for `selector-replace'
+        on line 1 of test.scss
diff --git a/spec/libsass-closed-issues/issue_1432/selector-replace/input.scss b/spec/libsass-closed-issues/issue_1432/selector-replace/input.scss
new file mode 100644
index 0000000000..96ff6c0c8e
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/selector-replace/input.scss
@@ -0,0 +1 @@
+@debug(selector-replace("foo", "bar", null));
diff --git a/spec/libsass-closed-issues/issue_1432/selector-unify/expected.compact.css b/spec/libsass-closed-issues/issue_1432/selector-unify/expected.compact.css
new file mode 100644
index 0000000000..652720d561
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/selector-unify/expected.compact.css
@@ -0,0 +1,3 @@
+Error: $selector2: null is not a valid selector: it must be a string,
+       a list of strings, or a list of lists of strings for `selector-unify'
+        on line 1 of test.scss
diff --git a/spec/libsass-closed-issues/issue_1432/selector-unify/expected.compressed.css b/spec/libsass-closed-issues/issue_1432/selector-unify/expected.compressed.css
new file mode 100644
index 0000000000..652720d561
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/selector-unify/expected.compressed.css
@@ -0,0 +1,3 @@
+Error: $selector2: null is not a valid selector: it must be a string,
+       a list of strings, or a list of lists of strings for `selector-unify'
+        on line 1 of test.scss
diff --git a/spec/libsass-closed-issues/issue_1432/selector-unify/expected.expanded.css b/spec/libsass-closed-issues/issue_1432/selector-unify/expected.expanded.css
new file mode 100644
index 0000000000..652720d561
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/selector-unify/expected.expanded.css
@@ -0,0 +1,3 @@
+Error: $selector2: null is not a valid selector: it must be a string,
+       a list of strings, or a list of lists of strings for `selector-unify'
+        on line 1 of test.scss
diff --git a/spec/libsass-closed-issues/issue_1432/selector-unify/expected_output.css b/spec/libsass-closed-issues/issue_1432/selector-unify/expected_output.css
new file mode 100644
index 0000000000..652720d561
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/selector-unify/expected_output.css
@@ -0,0 +1,3 @@
+Error: $selector2: null is not a valid selector: it must be a string,
+       a list of strings, or a list of lists of strings for `selector-unify'
+        on line 1 of test.scss
diff --git a/spec/libsass-closed-issues/issue_1432/selector-unify/input.scss b/spec/libsass-closed-issues/issue_1432/selector-unify/input.scss
new file mode 100644
index 0000000000..373f2d20d2
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/selector-unify/input.scss
@@ -0,0 +1 @@
+@debug(selector-unify("foo", null));
diff --git a/spec/libsass-closed-issues/issue_1432/simple-selectors/expected.compact.css b/spec/libsass-closed-issues/issue_1432/simple-selectors/expected.compact.css
new file mode 100644
index 0000000000..d9df6044da
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/simple-selectors/expected.compact.css
@@ -0,0 +1,2 @@
+Error: $selector: null is not a string for `simple-selectors'
+        on line 1 of test.scss
diff --git a/spec/libsass-closed-issues/issue_1432/simple-selectors/expected.compressed.css b/spec/libsass-closed-issues/issue_1432/simple-selectors/expected.compressed.css
new file mode 100644
index 0000000000..d9df6044da
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/simple-selectors/expected.compressed.css
@@ -0,0 +1,2 @@
+Error: $selector: null is not a string for `simple-selectors'
+        on line 1 of test.scss
diff --git a/spec/libsass-closed-issues/issue_1432/simple-selectors/expected.expanded.css b/spec/libsass-closed-issues/issue_1432/simple-selectors/expected.expanded.css
new file mode 100644
index 0000000000..d9df6044da
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/simple-selectors/expected.expanded.css
@@ -0,0 +1,2 @@
+Error: $selector: null is not a string for `simple-selectors'
+        on line 1 of test.scss
diff --git a/spec/libsass-closed-issues/issue_1432/simple-selectors/expected_output.css b/spec/libsass-closed-issues/issue_1432/simple-selectors/expected_output.css
new file mode 100644
index 0000000000..d9df6044da
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/simple-selectors/expected_output.css
@@ -0,0 +1,2 @@
+Error: $selector: null is not a string for `simple-selectors'
+        on line 1 of test.scss
diff --git a/spec/libsass-closed-issues/issue_1432/simple-selectors/input.scss b/spec/libsass-closed-issues/issue_1432/simple-selectors/input.scss
new file mode 100644
index 0000000000..08fe1167c9
--- /dev/null
+++ b/spec/libsass-closed-issues/issue_1432/simple-selectors/input.scss
@@ -0,0 +1 @@
+@debug(simple-selectors(null));