diff --git a/Changelog.md b/Changelog.md
index c47d26ba2..ff5a99503 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,7 +1,7 @@
 ### 0.8.21 (unreleased)
 
 Important Bugfixes:
- * Code Generator: Always generate code for the expression in ``expression.selector``.
+ * Code Generator: Always generate code for the expression in ``<expression>.selector`` in the legacy code generation pipeline.
  * Yul Optimizer: Fix ``FullInliner`` step (``i``) not preserving the evaluation order of arguments passed into inlined functions in code that is not in expression-split form (i.e. when using a custom optimizer sequence in which the step not preceded by ``ExpressionSplitter`` (``x``)).
 
 
diff --git a/docs/bugs.json b/docs/bugs.json
index e8b8507fa..6245bdeda 100644
--- a/docs/bugs.json
+++ b/docs/bugs.json
@@ -12,6 +12,19 @@
             "yulOptimizer": true
         }
     },
+    {
+        "uid": "SOL-2023-1",
+        "name": "MissingSideEffectsOnSelectorAccess",
+        "summary": "Accessing the ``.selector`` member on complex expressions leaves the expression unevaluated in the legacy code generation.",
+        "description": "When accessing the ``.selector`` member on an expression with side-effects, like an assignment, a function call or a conditional, the expression would not be evaluated in the legacy code generation. This would happen in expressions where the functions used in the expression were all known at compilation time, regardless of whether the whole expression could be evaluated at compilation time or not. Note that the code generated by the IR pipeline was unaffected and would behave as expected.",
+        "link": "https://blog.soliditylang.org/2023/07/19/missing-side-effects-on-selector-access-bug/",
+        "introduced": "0.6.2",
+        "fixed": "0.8.21",
+        "severity": "low",
+        "conditions": {
+            "viaIR": false
+        }
+    },
     {
         "uid": "SOL-2022-7",
         "name": "StorageWriteRemovalBeforeConditionalTermination",
diff --git a/docs/bugs_by_version.json b/docs/bugs_by_version.json
index 8f2ba1818..43d5af799 100644
--- a/docs/bugs_by_version.json
+++ b/docs/bugs_by_version.json
@@ -1423,6 +1423,7 @@
     "0.6.10": {
         "bugs": [
             "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup",
             "DirtyBytesArrayToStorage",
             "DataLocationChangeInInternalOverride",
@@ -1438,6 +1439,7 @@
     "0.6.11": {
         "bugs": [
             "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup",
             "DirtyBytesArrayToStorage",
             "DataLocationChangeInInternalOverride",
@@ -1453,6 +1455,7 @@
     "0.6.12": {
         "bugs": [
             "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup",
             "DirtyBytesArrayToStorage",
             "DataLocationChangeInInternalOverride",
@@ -1467,6 +1470,7 @@
     },
     "0.6.2": {
         "bugs": [
+            "MissingSideEffectsOnSelectorAccess",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup",
             "DirtyBytesArrayToStorage",
             "NestedCalldataArrayAbiReencodingSizeValidation",
@@ -1484,6 +1488,7 @@
     },
     "0.6.3": {
         "bugs": [
+            "MissingSideEffectsOnSelectorAccess",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup",
             "DirtyBytesArrayToStorage",
             "NestedCalldataArrayAbiReencodingSizeValidation",
@@ -1501,6 +1506,7 @@
     },
     "0.6.4": {
         "bugs": [
+            "MissingSideEffectsOnSelectorAccess",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup",
             "DirtyBytesArrayToStorage",
             "NestedCalldataArrayAbiReencodingSizeValidation",
@@ -1518,6 +1524,7 @@
     },
     "0.6.5": {
         "bugs": [
+            "MissingSideEffectsOnSelectorAccess",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup",
             "DirtyBytesArrayToStorage",
             "NestedCalldataArrayAbiReencodingSizeValidation",
@@ -1535,6 +1542,7 @@
     },
     "0.6.6": {
         "bugs": [
+            "MissingSideEffectsOnSelectorAccess",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup",
             "DirtyBytesArrayToStorage",
             "NestedCalldataArrayAbiReencodingSizeValidation",
@@ -1552,6 +1560,7 @@
     "0.6.7": {
         "bugs": [
             "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup",
             "DirtyBytesArrayToStorage",
             "NestedCalldataArrayAbiReencodingSizeValidation",
@@ -1569,6 +1578,7 @@
     "0.6.8": {
         "bugs": [
             "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup",
             "DirtyBytesArrayToStorage",
             "NestedCalldataArrayAbiReencodingSizeValidation",
@@ -1583,6 +1593,7 @@
     "0.6.9": {
         "bugs": [
             "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup",
             "DirtyBytesArrayToStorage",
             "DataLocationChangeInInternalOverride",
@@ -1599,6 +1610,7 @@
     "0.7.0": {
         "bugs": [
             "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup",
             "DirtyBytesArrayToStorage",
             "DataLocationChangeInInternalOverride",
@@ -1614,6 +1626,7 @@
     "0.7.1": {
         "bugs": [
             "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup",
             "DirtyBytesArrayToStorage",
             "DataLocationChangeInInternalOverride",
@@ -1630,6 +1643,7 @@
     "0.7.2": {
         "bugs": [
             "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup",
             "DirtyBytesArrayToStorage",
             "DataLocationChangeInInternalOverride",
@@ -1645,6 +1659,7 @@
     "0.7.3": {
         "bugs": [
             "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup",
             "DirtyBytesArrayToStorage",
             "DataLocationChangeInInternalOverride",
@@ -1659,6 +1674,7 @@
     "0.7.4": {
         "bugs": [
             "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup",
             "DirtyBytesArrayToStorage",
             "DataLocationChangeInInternalOverride",
@@ -1672,6 +1688,7 @@
     "0.7.5": {
         "bugs": [
             "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup",
             "DirtyBytesArrayToStorage",
             "DataLocationChangeInInternalOverride",
@@ -1685,6 +1702,7 @@
     "0.7.6": {
         "bugs": [
             "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup",
             "DirtyBytesArrayToStorage",
             "DataLocationChangeInInternalOverride",
@@ -1698,6 +1716,7 @@
     "0.8.0": {
         "bugs": [
             "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup",
             "DirtyBytesArrayToStorage",
             "DataLocationChangeInInternalOverride",
@@ -1711,6 +1730,7 @@
     "0.8.1": {
         "bugs": [
             "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup",
             "DirtyBytesArrayToStorage",
             "DataLocationChangeInInternalOverride",
@@ -1724,6 +1744,7 @@
     "0.8.10": {
         "bugs": [
             "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup",
             "DirtyBytesArrayToStorage",
             "DataLocationChangeInInternalOverride",
@@ -1734,6 +1755,7 @@
     "0.8.11": {
         "bugs": [
             "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup",
             "DirtyBytesArrayToStorage",
             "DataLocationChangeInInternalOverride",
@@ -1745,6 +1767,7 @@
     "0.8.12": {
         "bugs": [
             "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup",
             "DirtyBytesArrayToStorage",
             "DataLocationChangeInInternalOverride",
@@ -1756,6 +1779,7 @@
     "0.8.13": {
         "bugs": [
             "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess",
             "StorageWriteRemovalBeforeConditionalTermination",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup",
             "DirtyBytesArrayToStorage",
@@ -1768,6 +1792,7 @@
     "0.8.14": {
         "bugs": [
             "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess",
             "StorageWriteRemovalBeforeConditionalTermination",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup",
             "DirtyBytesArrayToStorage",
@@ -1778,6 +1803,7 @@
     "0.8.15": {
         "bugs": [
             "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess",
             "StorageWriteRemovalBeforeConditionalTermination",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup"
         ],
@@ -1786,31 +1812,36 @@
     "0.8.16": {
         "bugs": [
             "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess",
             "StorageWriteRemovalBeforeConditionalTermination"
         ],
         "released": "2022-08-08"
     },
     "0.8.17": {
         "bugs": [
-            "FullInlinerNonExpressionSplitArgumentEvaluationOrder"
+            "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess"
         ],
         "released": "2022-09-08"
     },
     "0.8.18": {
         "bugs": [
-            "FullInlinerNonExpressionSplitArgumentEvaluationOrder"
+            "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess"
         ],
         "released": "2023-02-01"
     },
     "0.8.19": {
         "bugs": [
-            "FullInlinerNonExpressionSplitArgumentEvaluationOrder"
+            "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess"
         ],
         "released": "2023-02-22"
     },
     "0.8.2": {
         "bugs": [
             "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup",
             "DirtyBytesArrayToStorage",
             "DataLocationChangeInInternalOverride",
@@ -1823,13 +1854,15 @@
     },
     "0.8.20": {
         "bugs": [
-            "FullInlinerNonExpressionSplitArgumentEvaluationOrder"
+            "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess"
         ],
         "released": "2023-05-10"
     },
     "0.8.3": {
         "bugs": [
             "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup",
             "DirtyBytesArrayToStorage",
             "DataLocationChangeInInternalOverride",
@@ -1842,6 +1875,7 @@
     "0.8.4": {
         "bugs": [
             "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup",
             "DirtyBytesArrayToStorage",
             "DataLocationChangeInInternalOverride",
@@ -1853,6 +1887,7 @@
     "0.8.5": {
         "bugs": [
             "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup",
             "DirtyBytesArrayToStorage",
             "DataLocationChangeInInternalOverride",
@@ -1864,6 +1899,7 @@
     "0.8.6": {
         "bugs": [
             "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup",
             "DirtyBytesArrayToStorage",
             "DataLocationChangeInInternalOverride",
@@ -1875,6 +1911,7 @@
     "0.8.7": {
         "bugs": [
             "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup",
             "DirtyBytesArrayToStorage",
             "DataLocationChangeInInternalOverride",
@@ -1886,6 +1923,7 @@
     "0.8.8": {
         "bugs": [
             "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup",
             "DirtyBytesArrayToStorage",
             "DataLocationChangeInInternalOverride",
@@ -1898,6 +1936,7 @@
     "0.8.9": {
         "bugs": [
             "FullInlinerNonExpressionSplitArgumentEvaluationOrder",
+            "MissingSideEffectsOnSelectorAccess",
             "AbiReencodingHeadOverflowWithStaticArrayCleanup",
             "DirtyBytesArrayToStorage",
             "DataLocationChangeInInternalOverride",
diff --git a/test/libsolidity/semanticTests/functionTypes/selector_assignment_expression.sol b/test/libsolidity/semanticTests/functionTypes/selector_assignment_expression.sol
new file mode 100644
index 000000000..896dbeb99
--- /dev/null
+++ b/test/libsolidity/semanticTests/functionTypes/selector_assignment_expression.sol
@@ -0,0 +1,10 @@
+contract C {
+    bool public z;
+    function f() public {
+        ((z = true) ? this.f : this.f).selector;
+    }
+}
+
+// ----
+// f()
+// z() -> true