From b7d26fdfde8285a9e868a71fcadc2414f101cc43 Mon Sep 17 00:00:00 2001
From: Hamish Knight <hamish_knight@apple.com>
Date: Thu, 29 May 2025 14:38:53 +0100
Subject: [PATCH] [test] Add some known type-checker + parser crashers

---
 .../compiler_crashers_2/109d1c5355f6eab4.swift            | 7 +++++++
 .../compiler_crashers_2/1470917329979c9a.swift            | 7 +++++++
 .../compiler_crashers_2/14b6ac8674b84f44.swift            | 4 ++++
 validation-test/compiler_crashers_2/15659ed9344beff.swift | 4 ++++
 validation-test/compiler_crashers_2/181de8a256df48e.swift | 4 ++++
 validation-test/compiler_crashers_2/2a41be58398eb21.swift | 4 ++++
 .../compiler_crashers_2/3077f0fa215b2f94.swift            | 5 +++++
 .../compiler_crashers_2/3badfb288fdf42f4.swift            | 4 ++++
 validation-test/compiler_crashers_2/43bf2cb496111e.swift  | 3 +++
 .../compiler_crashers_2/4414db6acd8120aa.swift            | 3 +++
 validation-test/compiler_crashers_2/448bdb8b9df6dd2.swift | 3 +++
 validation-test/compiler_crashers_2/457eda8bf9011b6.swift | 4 ++++
 .../compiler_crashers_2/462ee2aa7dc23cf3.swift            | 7 +++++++
 validation-test/compiler_crashers_2/4c7611b7d95a1fb.swift | 3 +++
 .../compiler_crashers_2/59b42964e169b6fa.swift            | 8 ++++++++
 .../compiler_crashers_2/5ac7591881325acd.swift            | 5 +++++
 .../compiler_crashers_2/5ca07be48f3dc630.swift            | 3 +++
 validation-test/compiler_crashers_2/5ce9cd9830dc12a.swift | 3 +++
 .../compiler_crashers_2/698f276cef6d3418.swift            | 4 ++++
 .../compiler_crashers_2/7315b4568a81e97d.swift            | 4 ++++
 .../compiler_crashers_2/756ba8587e7eb26b.swift            | 6 ++++++
 validation-test/compiler_crashers_2/78a5afee5d5b95.swift  | 3 +++
 .../compiler_crashers_2/807f13dbbc4a604f.swift            | 4 ++++
 .../compiler_crashers_2/9f30635127b9f25f.swift            | 7 +++++++
 .../compiler_crashers_2/a7ee60c01ddf9624.swift            | 6 ++++++
 .../compiler_crashers_2/aea9b13219906649.swift            | 5 +++++
 .../compiler_crashers_2/c25aed95f6f6d937.swift            | 7 +++++++
 .../compiler_crashers_2/c9ec50236e69e012.swift            | 5 +++++
 validation-test/compiler_crashers_2/ccbe6b312cbec2.swift  | 4 ++++
 .../compiler_crashers_2/d03a7ba9ca6274b0.swift            | 3 +++
 validation-test/compiler_crashers_2/d885506018b583.swift  | 3 +++
 .../compiler_crashers_2/f1419d3f3c2fe6b9.swift            | 4 ++++
 .../compiler_crashers_2/f6e25531c0e51b62.swift            | 5 +++++
 .../compiler_crashers_2/f9e59e692b1a6124.swift            | 3 +++
 .../compiler_crashers_2/fec3d092ae822aa6.swift            | 3 +++
 validation-test/compiler_crashers_2/issue-81834.swift     | 8 ++++++++
 36 files changed, 165 insertions(+)
 create mode 100644 validation-test/compiler_crashers_2/109d1c5355f6eab4.swift
 create mode 100644 validation-test/compiler_crashers_2/1470917329979c9a.swift
 create mode 100644 validation-test/compiler_crashers_2/14b6ac8674b84f44.swift
 create mode 100644 validation-test/compiler_crashers_2/15659ed9344beff.swift
 create mode 100644 validation-test/compiler_crashers_2/181de8a256df48e.swift
 create mode 100644 validation-test/compiler_crashers_2/2a41be58398eb21.swift
 create mode 100644 validation-test/compiler_crashers_2/3077f0fa215b2f94.swift
 create mode 100644 validation-test/compiler_crashers_2/3badfb288fdf42f4.swift
 create mode 100644 validation-test/compiler_crashers_2/43bf2cb496111e.swift
 create mode 100644 validation-test/compiler_crashers_2/4414db6acd8120aa.swift
 create mode 100644 validation-test/compiler_crashers_2/448bdb8b9df6dd2.swift
 create mode 100644 validation-test/compiler_crashers_2/457eda8bf9011b6.swift
 create mode 100644 validation-test/compiler_crashers_2/462ee2aa7dc23cf3.swift
 create mode 100644 validation-test/compiler_crashers_2/4c7611b7d95a1fb.swift
 create mode 100644 validation-test/compiler_crashers_2/59b42964e169b6fa.swift
 create mode 100644 validation-test/compiler_crashers_2/5ac7591881325acd.swift
 create mode 100644 validation-test/compiler_crashers_2/5ca07be48f3dc630.swift
 create mode 100644 validation-test/compiler_crashers_2/5ce9cd9830dc12a.swift
 create mode 100644 validation-test/compiler_crashers_2/698f276cef6d3418.swift
 create mode 100644 validation-test/compiler_crashers_2/7315b4568a81e97d.swift
 create mode 100644 validation-test/compiler_crashers_2/756ba8587e7eb26b.swift
 create mode 100644 validation-test/compiler_crashers_2/78a5afee5d5b95.swift
 create mode 100644 validation-test/compiler_crashers_2/807f13dbbc4a604f.swift
 create mode 100644 validation-test/compiler_crashers_2/9f30635127b9f25f.swift
 create mode 100644 validation-test/compiler_crashers_2/a7ee60c01ddf9624.swift
 create mode 100644 validation-test/compiler_crashers_2/aea9b13219906649.swift
 create mode 100644 validation-test/compiler_crashers_2/c25aed95f6f6d937.swift
 create mode 100644 validation-test/compiler_crashers_2/c9ec50236e69e012.swift
 create mode 100644 validation-test/compiler_crashers_2/ccbe6b312cbec2.swift
 create mode 100644 validation-test/compiler_crashers_2/d03a7ba9ca6274b0.swift
 create mode 100644 validation-test/compiler_crashers_2/d885506018b583.swift
 create mode 100644 validation-test/compiler_crashers_2/f1419d3f3c2fe6b9.swift
 create mode 100644 validation-test/compiler_crashers_2/f6e25531c0e51b62.swift
 create mode 100644 validation-test/compiler_crashers_2/f9e59e692b1a6124.swift
 create mode 100644 validation-test/compiler_crashers_2/fec3d092ae822aa6.swift
 create mode 100644 validation-test/compiler_crashers_2/issue-81834.swift

diff --git a/validation-test/compiler_crashers_2/109d1c5355f6eab4.swift b/validation-test/compiler_crashers_2/109d1c5355f6eab4.swift
new file mode 100644
index 0000000000000..1f2cc495f6d21
--- /dev/null
+++ b/validation-test/compiler_crashers_2/109d1c5355f6eab4.swift
@@ -0,0 +1,7 @@
+// {"signature":"swift::rewriting::RewriteContext::finishComputingRequirementSignatures(swift::ProtocolDecl const*)"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+protocol a : b where c == d<e> protocol f : g protocol g {
+  associatedtype 2 : a
+}
+struct d < e extension d
+    : f protocol h{associatedtype e associatedtype c : g} protocol b : h
diff --git a/validation-test/compiler_crashers_2/1470917329979c9a.swift b/validation-test/compiler_crashers_2/1470917329979c9a.swift
new file mode 100644
index 0000000000000..8a98f89ef6258
--- /dev/null
+++ b/validation-test/compiler_crashers_2/1470917329979c9a.swift
@@ -0,0 +1,7 @@
+// {"signature":"swift::PackExpansionType::PackExpansionType(swift::Type, swift::Type, swift::RecursiveTypeProperties, swift::ASTContext const*)"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+struct a < each b {
+  struct c {
+          d : (repeat(each b
+  func e {
+          c(&0
diff --git a/validation-test/compiler_crashers_2/14b6ac8674b84f44.swift b/validation-test/compiler_crashers_2/14b6ac8674b84f44.swift
new file mode 100644
index 0000000000000..24b8bad880983
--- /dev/null
+++ b/validation-test/compiler_crashers_2/14b6ac8674b84f44.swift
@@ -0,0 +1,4 @@
+// {"signature":"(anonymous namespace)::ABIDependencyEvaluator::computeABIDependenciesForModule(swift::ModuleDecl*)"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+switch {
+case init
diff --git a/validation-test/compiler_crashers_2/15659ed9344beff.swift b/validation-test/compiler_crashers_2/15659ed9344beff.swift
new file mode 100644
index 0000000000000..6e7b6e7c2378c
--- /dev/null
+++ b/validation-test/compiler_crashers_2/15659ed9344beff.swift
@@ -0,0 +1,4 @@
+// {"signature":"getTypeForSymbolRange(swift::rewriting::Symbol const*, swift::rewriting::Symbol const*, llvm::ArrayRef<swift::GenericTypeParamType*>, swift::rewriting::PropertyMap const&)"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+// REQUIRES: OS=macosx
+import Combine extension Publishers.Share{a <b , c where Upstream == Publishers.FlatMap <b, c>{func a <c where Upstream == Publishers.FlatMap <b, c>, c.Output ==
diff --git a/validation-test/compiler_crashers_2/181de8a256df48e.swift b/validation-test/compiler_crashers_2/181de8a256df48e.swift
new file mode 100644
index 0000000000000..b1635a257d88a
--- /dev/null
+++ b/validation-test/compiler_crashers_2/181de8a256df48e.swift
@@ -0,0 +1,4 @@
+// {"signature":"swift::rewriting::RequirementMachine::verify(swift::rewriting::MutableTerm const&) const"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+protocol a {
+  typealias Index extension Collection where Self : a{b : Index} protocol a
diff --git a/validation-test/compiler_crashers_2/2a41be58398eb21.swift b/validation-test/compiler_crashers_2/2a41be58398eb21.swift
new file mode 100644
index 0000000000000..24b045df5599d
--- /dev/null
+++ b/validation-test/compiler_crashers_2/2a41be58398eb21.swift
@@ -0,0 +1,4 @@
+// {"signature":"swift::DeclContext::getASTContext() const"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+@a({                              struct b                 }
+                        var c
diff --git a/validation-test/compiler_crashers_2/3077f0fa215b2f94.swift b/validation-test/compiler_crashers_2/3077f0fa215b2f94.swift
new file mode 100644
index 0000000000000..25e9dc3d3435f
--- /dev/null
+++ b/validation-test/compiler_crashers_2/3077f0fa215b2f94.swift
@@ -0,0 +1,5 @@
+// {"signature":"swift::Type llvm::function_ref<swift::Type (swift::SubstitutableType*)>::callback_fn<swift::TypeResolution::applyUnboundGenericArguments(swift::GenericTypeDecl*, swift::Type, swift::SourceLoc, llvm::ArrayRef<swift::Type>) const::$_0 const>(long, swift::SubstitutableType*)"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+protocol a extension a {
+  class b {
+    struct c < f struct d func e->c<d>
diff --git a/validation-test/compiler_crashers_2/3badfb288fdf42f4.swift b/validation-test/compiler_crashers_2/3badfb288fdf42f4.swift
new file mode 100644
index 0000000000000..ee3e535b1635a
--- /dev/null
+++ b/validation-test/compiler_crashers_2/3badfb288fdf42f4.swift
@@ -0,0 +1,4 @@
+// {"signature":"(anonymous namespace)::TypeSubstituter::transformDependentMemberType(swift::DependentMemberType*, swift::TypePosition)"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+// REQUIRES: OS=macosx
+import Combine extension Publishers.Share where Upstream == {a <b , c > where Upstream == Publishers.FlatMap <b, c>
diff --git a/validation-test/compiler_crashers_2/43bf2cb496111e.swift b/validation-test/compiler_crashers_2/43bf2cb496111e.swift
new file mode 100644
index 0000000000000..cdfc24fbd0bfb
--- /dev/null
+++ b/validation-test/compiler_crashers_2/43bf2cb496111e.swift
@@ -0,0 +1,3 @@
+// {"signature":"swift::Lexer::formEscapedIdentifierToken(char const*)"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+``
diff --git a/validation-test/compiler_crashers_2/4414db6acd8120aa.swift b/validation-test/compiler_crashers_2/4414db6acd8120aa.swift
new file mode 100644
index 0000000000000..bd1f31726071d
--- /dev/null
+++ b/validation-test/compiler_crashers_2/4414db6acd8120aa.swift
@@ -0,0 +1,3 @@
+// {"signature":"swift::ast_scope::ASTScopeImpl::printRange(llvm::raw_ostream&) const"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+func a < >>
diff --git a/validation-test/compiler_crashers_2/448bdb8b9df6dd2.swift b/validation-test/compiler_crashers_2/448bdb8b9df6dd2.swift
new file mode 100644
index 0000000000000..ca2bcd37ab654
--- /dev/null
+++ b/validation-test/compiler_crashers_2/448bdb8b9df6dd2.swift
@@ -0,0 +1,3 @@
+// {"signature":"swift::DeclRefTypeRepr::overwriteNameRef(swift::DeclNameRef)"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+switch {                         case    init(
diff --git a/validation-test/compiler_crashers_2/457eda8bf9011b6.swift b/validation-test/compiler_crashers_2/457eda8bf9011b6.swift
new file mode 100644
index 0000000000000..109005f0423c0
--- /dev/null
+++ b/validation-test/compiler_crashers_2/457eda8bf9011b6.swift
@@ -0,0 +1,4 @@
+// {"signature":"swift::constraints::ConstraintSystem::setCapturedExpansions(swift::AnyFunctionRef, llvm::SmallVector<swift::PackExpansionExpr*, 1u>)"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+{
+  repeat a {
diff --git a/validation-test/compiler_crashers_2/462ee2aa7dc23cf3.swift b/validation-test/compiler_crashers_2/462ee2aa7dc23cf3.swift
new file mode 100644
index 0000000000000..e6e0a2c765574
--- /dev/null
+++ b/validation-test/compiler_crashers_2/462ee2aa7dc23cf3.swift
@@ -0,0 +1,7 @@
+// {"signature":"recordTypeWitness(swift::NormalProtocolConformance*, swift::AssociatedTypeDecl*, swift::Type, swift::TypeDecl*)"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+protocol a{associatedtype b} protocol c
+    : a{d(b)} protocol e{associatedtype f} extension e {
+  protocol g : e, c { associatedtype f : c associatedtype b }
+  struct h<i> : g {
+    typealias f = i
diff --git a/validation-test/compiler_crashers_2/4c7611b7d95a1fb.swift b/validation-test/compiler_crashers_2/4c7611b7d95a1fb.swift
new file mode 100644
index 0000000000000..d7404dcf2dcb3
--- /dev/null
+++ b/validation-test/compiler_crashers_2/4c7611b7d95a1fb.swift
@@ -0,0 +1,3 @@
+// {"signature":"(anonymous namespace)::ConstraintWalker::walkToExprPost(swift::Expr*)"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+\.+=
diff --git a/validation-test/compiler_crashers_2/59b42964e169b6fa.swift b/validation-test/compiler_crashers_2/59b42964e169b6fa.swift
new file mode 100644
index 0000000000000..1fafba98fc4df
--- /dev/null
+++ b/validation-test/compiler_crashers_2/59b42964e169b6fa.swift
@@ -0,0 +1,8 @@
+// {"signature":"swift::ProtocolConformanceRef::getProtocol() const"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+   func a<each b {
+                   enum c {
+                    case struct  var d: e      struct e {
+                    g: c          }
+                     f {
+                    d.g == .struct 
diff --git a/validation-test/compiler_crashers_2/5ac7591881325acd.swift b/validation-test/compiler_crashers_2/5ac7591881325acd.swift
new file mode 100644
index 0000000000000..75e1c0406a740
--- /dev/null
+++ b/validation-test/compiler_crashers_2/5ac7591881325acd.swift
@@ -0,0 +1,5 @@
+// {"signature":"swift::constraints::Constraint::Constraint(swift::constraints::ConstraintKind, swift::Type, swift::Type, swift::constraints::ConstraintLocator*, llvm::SmallPtrSetImpl<swift::TypeVariableType*>&)"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+extension _UIntBuffer {
+  a {
+    struct b : OptionSet
diff --git a/validation-test/compiler_crashers_2/5ca07be48f3dc630.swift b/validation-test/compiler_crashers_2/5ca07be48f3dc630.swift
new file mode 100644
index 0000000000000..c5c4158eb4ada
--- /dev/null
+++ b/validation-test/compiler_crashers_2/5ca07be48f3dc630.swift
@@ -0,0 +1,3 @@
+// {"signature":"swift::TuplePatternElt& llvm::SmallVectorTemplateBase<swift::TuplePatternElt, true>::growAndEmplaceBack<swift::Identifier, swift::SourceLoc, swift::Pattern*&>(swift::Identifier&&, swift::SourceLoc&&, swift::Pattern*&)"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+switch {                           case .a(&b
diff --git a/validation-test/compiler_crashers_2/5ce9cd9830dc12a.swift b/validation-test/compiler_crashers_2/5ce9cd9830dc12a.swift
new file mode 100644
index 0000000000000..548c5ce15d38c
--- /dev/null
+++ b/validation-test/compiler_crashers_2/5ce9cd9830dc12a.swift
@@ -0,0 +1,3 @@
+// {"signature":"swift::DeclAndTypePrinter::Implementation::visitVarDecl(swift::VarDecl*)"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+#init
diff --git a/validation-test/compiler_crashers_2/698f276cef6d3418.swift b/validation-test/compiler_crashers_2/698f276cef6d3418.swift
new file mode 100644
index 0000000000000..a849109089a8b
--- /dev/null
+++ b/validation-test/compiler_crashers_2/698f276cef6d3418.swift
@@ -0,0 +1,4 @@
+// {"signature":"swift::DefaultAndMaxAccessLevelRequest::cacheResult(std::__1::pair<swift::AccessLevel, swift::AccessLevel>) const"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+struct a < b extension a where b : c, d == a {
+  protocol c struct a
diff --git a/validation-test/compiler_crashers_2/7315b4568a81e97d.swift b/validation-test/compiler_crashers_2/7315b4568a81e97d.swift
new file mode 100644
index 0000000000000..7c614858de512
--- /dev/null
+++ b/validation-test/compiler_crashers_2/7315b4568a81e97d.swift
@@ -0,0 +1,4 @@
+// {"signature":"swift::GenericSignature::verify(llvm::ArrayRef<swift::Requirement>) const"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+protocol a {
+  typealias b where Self : a protocol a
diff --git a/validation-test/compiler_crashers_2/756ba8587e7eb26b.swift b/validation-test/compiler_crashers_2/756ba8587e7eb26b.swift
new file mode 100644
index 0000000000000..400b75db3b19b
--- /dev/null
+++ b/validation-test/compiler_crashers_2/756ba8587e7eb26b.swift
@@ -0,0 +1,6 @@
+// {"signature":"(anonymous namespace)::Verifier::verifyChecked(swift::Type)"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+class a < b {
+  d {
+    class e<c, b> : a struct f subscript<g>(h : e<f, g>) {
+      h.d base
diff --git a/validation-test/compiler_crashers_2/78a5afee5d5b95.swift b/validation-test/compiler_crashers_2/78a5afee5d5b95.swift
new file mode 100644
index 0000000000000..348b91b83b957
--- /dev/null
+++ b/validation-test/compiler_crashers_2/78a5afee5d5b95.swift
@@ -0,0 +1,3 @@
+// {"signature":"swift::Parser::parseStmtConditionElement(llvm::SmallVectorImpl<swift::StmtConditionElement>&, swift::Diag<>, swift::StmtKind, llvm::StringRef&)"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+     func a: b[        if let
diff --git a/validation-test/compiler_crashers_2/807f13dbbc4a604f.swift b/validation-test/compiler_crashers_2/807f13dbbc4a604f.swift
new file mode 100644
index 0000000000000..26919df70d816
--- /dev/null
+++ b/validation-test/compiler_crashers_2/807f13dbbc4a604f.swift
@@ -0,0 +1,4 @@
+// {"signature":"swift::AccessLevelRequest::cacheResult(swift::AccessLevel) const"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+class a < b extension a where c == d {
+  protocol d
diff --git a/validation-test/compiler_crashers_2/9f30635127b9f25f.swift b/validation-test/compiler_crashers_2/9f30635127b9f25f.swift
new file mode 100644
index 0000000000000..7b1a16a1fe0d9
--- /dev/null
+++ b/validation-test/compiler_crashers_2/9f30635127b9f25f.swift
@@ -0,0 +1,7 @@
+// {"signature":"(anonymous namespace)::PreCheckTarget::walkToExprPre(swift::Expr*)"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+{
+  extension a {
+    b {
+      func c {
+        super
diff --git a/validation-test/compiler_crashers_2/a7ee60c01ddf9624.swift b/validation-test/compiler_crashers_2/a7ee60c01ddf9624.swift
new file mode 100644
index 0000000000000..e965f864c172f
--- /dev/null
+++ b/validation-test/compiler_crashers_2/a7ee60c01ddf9624.swift
@@ -0,0 +1,6 @@
+// {"signature":"(anonymous namespace)::LookupResultBuilder::add(swift::ValueDecl*, swift::DeclContext*, swift::ValueDecl*, swift::Type, bool)::'lambda'(swift::ValueDecl*)::operator()(swift::ValueDecl*) const"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+protocol a{b} protocol c : a protocol d : c extension d {
+  struct e : d {
+    f {
+      b
diff --git a/validation-test/compiler_crashers_2/aea9b13219906649.swift b/validation-test/compiler_crashers_2/aea9b13219906649.swift
new file mode 100644
index 0000000000000..5deca465201ff
--- /dev/null
+++ b/validation-test/compiler_crashers_2/aea9b13219906649.swift
@@ -0,0 +1,5 @@
+// {"signature":"checkRequirementsImpl(llvm::ArrayRef<swift::Requirement>, bool)"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+struct a < Element {
+  b {
+    class c : Collection {          typealias Index = d subscript(e                                                               :
diff --git a/validation-test/compiler_crashers_2/c25aed95f6f6d937.swift b/validation-test/compiler_crashers_2/c25aed95f6f6d937.swift
new file mode 100644
index 0000000000000..db9bbd82eac20
--- /dev/null
+++ b/validation-test/compiler_crashers_2/c25aed95f6f6d937.swift
@@ -0,0 +1,7 @@
+// {"signature":"Assertion failed: (detail::isPresent(Val) && \"dyn_cast on a non-existent value\"), function dyn_cast, file Casting.h, line 662."}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+{
+  extension {
+    a {
+      func b {
+        super
diff --git a/validation-test/compiler_crashers_2/c9ec50236e69e012.swift b/validation-test/compiler_crashers_2/c9ec50236e69e012.swift
new file mode 100644
index 0000000000000..ae11ff657f040
--- /dev/null
+++ b/validation-test/compiler_crashers_2/c9ec50236e69e012.swift
@@ -0,0 +1,5 @@
+// {"signature":"(anonymous namespace)::Verifier::verifyParsed(swift::AbstractClosureExpr*)"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+func == {
+  switch {
+  case.a {
diff --git a/validation-test/compiler_crashers_2/ccbe6b312cbec2.swift b/validation-test/compiler_crashers_2/ccbe6b312cbec2.swift
new file mode 100644
index 0000000000000..e91101da75ad9
--- /dev/null
+++ b/validation-test/compiler_crashers_2/ccbe6b312cbec2.swift
@@ -0,0 +1,4 @@
+// {"signature":"swift::constraints::MissingConformanceFailure::diagnoseTypeCannotConform(swift::Type, swift::Type) const"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+protocol a extension a {
+  b {                     func * (Self=  {
diff --git a/validation-test/compiler_crashers_2/d03a7ba9ca6274b0.swift b/validation-test/compiler_crashers_2/d03a7ba9ca6274b0.swift
new file mode 100644
index 0000000000000..4edef177fa287
--- /dev/null
+++ b/validation-test/compiler_crashers_2/d03a7ba9ca6274b0.swift
@@ -0,0 +1,3 @@
+// {"signature":"swift::ParamSpecifierRequest::evaluate(swift::Evaluator&, swift::ParamDecl*) const"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+func a([0])
diff --git a/validation-test/compiler_crashers_2/d885506018b583.swift b/validation-test/compiler_crashers_2/d885506018b583.swift
new file mode 100644
index 0000000000000..e4f0962ec4014
--- /dev/null
+++ b/validation-test/compiler_crashers_2/d885506018b583.swift
@@ -0,0 +1,3 @@
+// {"signature":"swift::AvailabilityContext::Storage::get(swift::AvailabilityRange const&, bool, llvm::ArrayRef<swift::AvailabilityContext::DomainInfo>, swift::ASTContext const&)"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+protocol a extension a where b == Self{c : } typealias b : Sequence
diff --git a/validation-test/compiler_crashers_2/f1419d3f3c2fe6b9.swift b/validation-test/compiler_crashers_2/f1419d3f3c2fe6b9.swift
new file mode 100644
index 0000000000000..ab31c3ae6c828
--- /dev/null
+++ b/validation-test/compiler_crashers_2/f1419d3f3c2fe6b9.swift
@@ -0,0 +1,4 @@
+// {"signature":"swift::QueryInterfaceTypeSubstitutions::operator()(swift::SubstitutableType*) const"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+extension Collection where Self : a {
+  struct Index protocol a
diff --git a/validation-test/compiler_crashers_2/f6e25531c0e51b62.swift b/validation-test/compiler_crashers_2/f6e25531c0e51b62.swift
new file mode 100644
index 0000000000000..25bdae0e48872
--- /dev/null
+++ b/validation-test/compiler_crashers_2/f6e25531c0e51b62.swift
@@ -0,0 +1,5 @@
+// {"signature":"swift::constraints::RequirementFailure::RequirementFailure(swift::constraints::Solution const&, swift::Type, swift::Type, swift::constraints::ConstraintLocator*)"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+protocol a{associatedtype b} extension a where b == {
+  protocol c var d : c {
+    d
diff --git a/validation-test/compiler_crashers_2/f9e59e692b1a6124.swift b/validation-test/compiler_crashers_2/f9e59e692b1a6124.swift
new file mode 100644
index 0000000000000..41c28cf10bfcc
--- /dev/null
+++ b/validation-test/compiler_crashers_2/f9e59e692b1a6124.swift
@@ -0,0 +1,3 @@
+// {"signature":"swift::constraints::Solution::getFunctionArgApplyInfo(swift::constraints::ConstraintLocator*) const"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+func a<b, each c>(d : repeat(b)->each c) {                               repeat d(e = f
diff --git a/validation-test/compiler_crashers_2/fec3d092ae822aa6.swift b/validation-test/compiler_crashers_2/fec3d092ae822aa6.swift
new file mode 100644
index 0000000000000..950e4eef006d3
--- /dev/null
+++ b/validation-test/compiler_crashers_2/fec3d092ae822aa6.swift
@@ -0,0 +1,3 @@
+// {"signature":"swift::Parser::parseExprSequenceElement(swift::Diag<>, bool)"}
+// RUN: not --crash %target-swift-frontend -typecheck %s
+any a <
diff --git a/validation-test/compiler_crashers_2/issue-81834.swift b/validation-test/compiler_crashers_2/issue-81834.swift
new file mode 100644
index 0000000000000..ffb6f51411a38
--- /dev/null
+++ b/validation-test/compiler_crashers_2/issue-81834.swift
@@ -0,0 +1,8 @@
+// RUN: not --crash %target-swift-frontend -typecheck -library-level api %s
+// REQUIRES: OS=macosx
+
+// https://github.com/swiftlang/swift/issues/81834
+public class C {
+  public subscript() -> Int {
+    get {
+      extension C {}