diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index f6d66aa0a0..625cafe4f0 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -37,7 +37,7 @@ jobs:
       - run: pip install -e ".[doc]"
       - run: pdoc -o html/ slither '!slither.tools' #TODO fix import errors on pdoc run
       - name: Upload artifact
-        uses: actions/upload-pages-artifact@v1
+        uses: actions/upload-pages-artifact@v2
         with:
           # Upload the doc
           path: './html/'
diff --git a/.github/workflows/linter.yml b/.github/workflows/linter.yml
index b352a8301d..0468b07f8a 100644
--- a/.github/workflows/linter.yml
+++ b/.github/workflows/linter.yml
@@ -9,8 +9,6 @@ defaults:
 on:
   pull_request:
     branches: [master, dev]
-    paths:
-      - "**/*.py"
     
   schedule:
     # run CI every day even if no PRs/merges occur
@@ -42,6 +40,10 @@ jobs:
           mkdir -p .github/linters
           cp pyproject.toml .github/linters
 
+      - name: Register yamllint problem matcher
+        run: |
+          echo "::add-matcher::.github/workflows/matchers/yamllint.json"
+
       - name: Lint everything else
         uses: super-linter/super-linter/slim@v4.9.2
         if: always()
@@ -55,7 +57,6 @@ jobs:
           VALIDATE_PYTHON_PYLINT: false
           VALIDATE_PYTHON_BLACK: false
           VALIDATE_PYTHON_ISORT: false
-          # Always false
           VALIDATE_JSON: false
           VALIDATE_JAVASCRIPT_STANDARD: false
           VALIDATE_PYTHON_FLAKE8: false
diff --git a/.github/workflows/matchers/pylint.json b/.github/workflows/matchers/pylint.json
new file mode 100644
index 0000000000..4d9e13fca7
--- /dev/null
+++ b/.github/workflows/matchers/pylint.json
@@ -0,0 +1,32 @@
+{
+    "problemMatcher": [
+      {
+        "owner": "pylint-error",
+        "severity": "error",
+        "pattern": [
+          {
+            "regexp": "^(.+):(\\d+):(\\d+):\\s(([EF]\\d{4}):\\s.+)$",
+            "file": 1,
+            "line": 2,
+            "column": 3,
+            "message": 4,
+            "code": 5
+          }
+        ]
+      },
+      {
+        "owner": "pylint-warning",
+        "severity": "warning",
+        "pattern": [
+          {
+            "regexp": "^(.+):(\\d+):(\\d+):\\s(([CRW]\\d{4}):\\s.+)$",
+            "file": 1,
+            "line": 2,
+            "column": 3,
+            "message": 4,
+            "code": 5
+          }
+        ]
+      }
+    ]
+}
\ No newline at end of file
diff --git a/.github/workflows/matchers/yamllint.json b/.github/workflows/matchers/yamllint.json
new file mode 100644
index 0000000000..b0b2f125c6
--- /dev/null
+++ b/.github/workflows/matchers/yamllint.json
@@ -0,0 +1,22 @@
+{
+    "problemMatcher": [
+      {
+        "owner": "yamllint",
+        "pattern": [
+          {
+            "regexp": "^(.*\\.ya?ml)$",
+            "file": 1
+          },
+          {
+            "regexp": "^\\s{2}(\\d+):(\\d+)\\s+(error|warning)\\s+(.*?)\\s+\\((.*)\\)$",
+            "line": 1,
+            "column": 2,
+            "severity": 3,
+            "message": 4,
+            "code": 5,
+            "loop": true
+          }
+        ]
+      }
+    ]
+  }
\ No newline at end of file
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index f7d9ff9e7b..b90d490df9 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -44,11 +44,10 @@ jobs:
           path: dist/
 
       - name: publish
-        uses: pypa/gh-action-pypi-publish@v1.8.7
+        uses: pypa/gh-action-pypi-publish@v1.8.10
 
       - name: sign
-        uses: sigstore/gh-action-sigstore-python@v1.2.3
+        uses: sigstore/gh-action-sigstore-python@v2.0.1
         with:
           inputs: ./dist/*.tar.gz ./dist/*.whl
           release-signing-artifacts: true
-          bundle-only: true
diff --git a/.github/workflows/pylint.yml b/.github/workflows/pylint.yml
index 207f98eac0..8c7e7bce93 100644
--- a/.github/workflows/pylint.yml
+++ b/.github/workflows/pylint.yml
@@ -9,6 +9,8 @@ defaults:
 on:
   pull_request:
     branches: [master, dev]
+    paths:
+      - "**/*.py"
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
@@ -36,6 +38,10 @@ jobs:
           mkdir -p .github/linters
           cp pyproject.toml .github/linters
 
+      - name: Register pylint problem matcher
+        run: |
+          echo "::add-matcher::.github/workflows/matchers/pylint.json"
+
       - name: Pylint
         uses: super-linter/super-linter/slim@v4.9.2
         if: always()
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 5cf02136bd..ae7951c7f9 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -96,8 +96,8 @@ For each new detector, at least one regression tests must be present.
 #### Adding parsing tests
 
 1. Create a test in `tests/e2e/solc_parsing/`
-2. Run `python tests/e2e/solc_parsing/test_ast_parsing.py --compile`. This will compile the artifact in `tests/e2e/solc_parsing/compile`. Add the compiled artifact to git.
-3. Update `ALL_TESTS` in `tests/e2e/solc_parsing/test_ast_parsing.py`.
+2. Update `ALL_TESTS` in `tests/e2e/solc_parsing/test_ast_parsing.py`.
+3. Run `python tests/e2e/solc_parsing/test_ast_parsing.py --compile`. This will compile the artifact in `tests/e2e/solc_parsing/compile`. Add the compiled artifact to git.
 4. Run `python tests/e2e/solc_parsing/test_ast_parsing.py --generate`. This will generate the json artifacts in `tests/e2e/solc_parsing/expected_json`. Add the generated files to git.
 5. Run `pytest tests/e2e/solc_parsing/test_ast_parsing.py` and check that everything worked.
 
diff --git a/slither/core/declarations/__init__.py b/slither/core/declarations/__init__.py
index 92e0b9eca3..f341187518 100644
--- a/slither/core/declarations/__init__.py
+++ b/slither/core/declarations/__init__.py
@@ -18,3 +18,5 @@
 from .function_contract import FunctionContract
 from .function_top_level import FunctionTopLevel
 from .custom_error_contract import CustomErrorContract
+from .custom_error_top_level import CustomErrorTopLevel
+from .custom_error import CustomError
diff --git a/slither/core/declarations/contract.py b/slither/core/declarations/contract.py
index fd2cdd4684..9b1488db31 100644
--- a/slither/core/declarations/contract.py
+++ b/slither/core/declarations/contract.py
@@ -861,7 +861,7 @@ def get_state_variable_from_canonical_name(
         Returns:
             StateVariable
         """
-        return next((v for v in self.state_variables if v.name == canonical_name), None)
+        return next((v for v in self.state_variables if v.canonical_name == canonical_name), None)
 
     def get_structure_from_name(self, structure_name: str) -> Optional["StructureContract"]:
         """
diff --git a/slither/core/declarations/custom_error_contract.py b/slither/core/declarations/custom_error_contract.py
index cd279a3a62..2c8bec9efa 100644
--- a/slither/core/declarations/custom_error_contract.py
+++ b/slither/core/declarations/custom_error_contract.py
@@ -16,3 +16,7 @@ def is_declared_by(self, contract: "Contract") -> bool:
         :return:
         """
         return self.contract == contract
+
+    @property
+    def canonical_name(self) -> str:
+        return self.contract.name + "." + self.full_name
diff --git a/slither/core/declarations/custom_error_top_level.py b/slither/core/declarations/custom_error_top_level.py
index 64a6a85353..b80356b245 100644
--- a/slither/core/declarations/custom_error_top_level.py
+++ b/slither/core/declarations/custom_error_top_level.py
@@ -12,3 +12,7 @@ class CustomErrorTopLevel(CustomError, TopLevel):
     def __init__(self, compilation_unit: "SlitherCompilationUnit", scope: "FileScope") -> None:
         super().__init__(compilation_unit)
         self.file_scope: "FileScope" = scope
+
+    @property
+    def canonical_name(self) -> str:
+        return self.full_name
diff --git a/slither/core/expressions/unary_operation.py b/slither/core/expressions/unary_operation.py
index 6572249278..4051326131 100644
--- a/slither/core/expressions/unary_operation.py
+++ b/slither/core/expressions/unary_operation.py
@@ -106,8 +106,6 @@ def __init__(
             UnaryOperationType.MINUSMINUS_PRE,
             UnaryOperationType.PLUSPLUS_POST,
             UnaryOperationType.MINUSMINUS_POST,
-            UnaryOperationType.PLUS_PRE,
-            UnaryOperationType.MINUS_PRE,
         ]:
             expression.set_lvalue()
 
diff --git a/slither/utils/output.py b/slither/utils/output.py
index 84c9ac65a1..4a91ca9b9b 100644
--- a/slither/utils/output.py
+++ b/slither/utils/output.py
@@ -18,6 +18,7 @@
     Structure,
     Pragma,
     FunctionContract,
+    CustomError,
 )
 from slither.core.source_mapping.source_mapping import SourceMapping
 from slither.core.variables.local_variable import LocalVariable
@@ -438,6 +439,8 @@ def add(self, add: SupportedOutput, additional_fields: Optional[Dict] = None) ->
             self.add_event(add, additional_fields=additional_fields)
         elif isinstance(add, Structure):
             self.add_struct(add, additional_fields=additional_fields)
+        elif isinstance(add, CustomError):
+            self.add_custom_error(add, additional_fields=additional_fields)
         elif isinstance(add, Pragma):
             self.add_pragma(add, additional_fields=additional_fields)
         elif isinstance(add, Node):
@@ -585,6 +588,32 @@ def add_event(self, event: Event, additional_fields: Optional[Dict] = None) -> N
 
         self._data["elements"].append(element)
 
+    # endregion
+    ###################################################################################
+    ###################################################################################
+    # region CustomError
+    ###################################################################################
+    ###################################################################################
+
+    def add_custom_error(
+        self, custom_error: CustomError, additional_fields: Optional[Dict] = None
+    ) -> None:
+        if additional_fields is None:
+            additional_fields = {}
+        type_specific_fields = {
+            "parent": _create_parent_element(custom_error),
+            "signature": custom_error.full_name,
+        }
+        element = _create_base_element(
+            "custom_error",
+            custom_error.name,
+            custom_error.source_mapping.to_json(),
+            type_specific_fields,
+            additional_fields,
+        )
+
+        self._data["elements"].append(element)
+
     # endregion
     ###################################################################################
     ###################################################################################
diff --git a/tests/unit/slithir/test_ternary_expressions.py b/tests/unit/slithir/test_ternary_expressions.py
index 0acd9345d7..712c9582b0 100644
--- a/tests/unit/slithir/test_ternary_expressions.py
+++ b/tests/unit/slithir/test_ternary_expressions.py
@@ -1,8 +1,13 @@
 from pathlib import Path
 from slither import Slither
 from slither.core.cfg.node import NodeType
-from slither.slithir.operations import Assignment
-from slither.core.expressions import AssignmentOperation, TupleExpression
+from slither.slithir.operations import Assignment, Unpack
+from slither.core.expressions import (
+    AssignmentOperation,
+    TupleExpression,
+    NewElementaryType,
+    CallExpression,
+)
 
 
 TEST_DATA_DIR = Path(__file__).resolve().parent / "test_data"
@@ -12,27 +17,29 @@ def test_ternary_conversions(solc_binary_path) -> None:
     solc_path = solc_binary_path("0.8.0")
     slither = Slither(Path(TEST_DATA_DIR, "ternary_expressions.sol").as_posix(), solc=solc_path)
     for contract in slither.contracts:
-        for function in contract.functions:
-            vars_declared = 0
-            vars_assigned = 0
-            for node in function.nodes:
-                if node.type in [NodeType.IF, NodeType.IFLOOP]:
+        if not contract.is_signature_only:
+            for function in contract.functions:
+                vars_declared = 0
+                vars_assigned = 0
+                for node in function.nodes:
+                    if node.type in [NodeType.IF, NodeType.IFLOOP]:
 
-                    # Iterate over true and false son
-                    for inner_node in node.sons:
-                        # Count all variables declared
-                        expression = inner_node.expression
-                        if isinstance(expression, AssignmentOperation):
-                            var_expr = expression.expression_left
-                            # Only tuples declare more than one var
-                            if isinstance(var_expr, TupleExpression):
-                                vars_declared += len(var_expr.expressions)
-                            else:
-                                vars_declared += 1
+                        # Iterate over true and false son
+                        for inner_node in node.sons:
+                            # Count all variables declared
+                            expression = inner_node.expression
+                            if isinstance(
+                                expression, (AssignmentOperation, NewElementaryType, CallExpression)
+                            ):
+                                var_expr = expression.expression_left
+                                # Only tuples declare more than one var
+                                if isinstance(var_expr, TupleExpression):
+                                    vars_declared += len(var_expr.expressions)
+                                else:
+                                    vars_declared += 1
 
-                        for ir in inner_node.irs:
-                            # Count all variables defined
-                            if isinstance(ir, Assignment):
-                                vars_assigned += 1
-
-            assert vars_declared == vars_assigned
+                            for ir in inner_node.irs:
+                                # Count all variables defined
+                                if isinstance(ir, (Assignment, Unpack)):
+                                    vars_assigned += 1
+                assert vars_declared == vars_assigned and vars_assigned != 0