diff --git a/Sources/LLBuildManifest/LLBuildManifestWriter.swift b/Sources/LLBuildManifest/LLBuildManifestWriter.swift
index d902aca8ca0..f4a6375683d 100644
--- a/Sources/LLBuildManifest/LLBuildManifestWriter.swift
+++ b/Sources/LLBuildManifest/LLBuildManifestWriter.swift
@@ -129,63 +129,63 @@ public struct ManifestToolStream {
     fileprivate var buffer = ""
 
     public subscript(key: String) -> Int {
-        get { fatalError() }
+        get { fatalError("\(#file):\(#line) at function \(#function) - Cannot get subscript that return an Int") }
         set {
             self.buffer += "    \(key): \(newValue.description.asJSON)\n"
         }
     }
 
     public subscript(key: String) -> String {
-        get { fatalError() }
+        get { fatalError("\(#file):\(#line) at function \(#function) - Cannot get subscript that return a String") }
         set {
             self.buffer += "    \(key): \(newValue.asJSON)\n"
         }
     }
 
     public subscript(key: String) -> ToolProtocol {
-        get { fatalError() }
+        get { fatalError("\(#file):\(#line) at function \(#function) - Cannot get subscript that return a ToolProtocol") }
         set {
             self.buffer += "    \(key): \(type(of: newValue).name)\n"
         }
     }
 
     public subscript(key: String) -> AbsolutePath {
-        get { fatalError() }
+        get { fatalError("\(#file):\(#line) at function \(#function) - Cannot get subscript that return an AbsolutePath") }
         set {
             self.buffer += "    \(key): \(newValue.pathString.asJSON)\n"
         }
     }
 
     public subscript(key: String) -> [AbsolutePath] {
-        get { fatalError() }
+        get { fatalError("\(#file):\(#line) at function \(#function) - Cannot get subscript that return an array of AbsolutePath") }
         set {
             self.buffer += "    \(key): \(newValue.map(\.pathString).asJSON)\n"
         }
     }
 
     public subscript(key: String) -> [Node] {
-        get { fatalError() }
+        get { fatalError("\(#file):\(#line) at function \(#function) - Cannot get subscript that return an array of Node") }
         set {
             self.buffer += "    \(key): \(newValue.map(\.encodingName).asJSON)\n"
         }
     }
 
     public subscript(key: String) -> Bool {
-        get { fatalError() }
+        get { fatalError("\(#file):\(#line) at function \(#function) - Cannot get subscript that return a Bool") }
         set {
             self.buffer += "    \(key): \(newValue.description)\n"
         }
     }
 
     public subscript(key: String) -> [String] {
-        get { fatalError() }
+        get { fatalError("\(#file):\(#line) at function \(#function) - Cannot get subscript that return an array of String") }
         set {
             self.buffer += "    \(key): \(newValue.asJSON)\n"
         }
     }
 
     public subscript(key: String) -> [String: String] {
-        get { fatalError() }
+        get { fatalError("\(#file):\(#line) at function \(#function) - Cannot get subscript that return a [String: String]") }
         set {
             self.buffer += "    \(key):\n"
             for (key, value) in newValue.sorted(by: { $0.key < $1.key }) {
@@ -195,7 +195,7 @@ public struct ManifestToolStream {
     }
 
     package subscript(key: String) -> Environment {
-        get { fatalError() }
+        get { fatalError("\(#file):\(#line) at function \(#function) - Cannot get subscript that return an Environment") }
         set {
             self.buffer += "    \(key):\n"
             for (key, value) in newValue.sorted(by: { $0.key < $1.key }) {
diff --git a/Sources/PackageGraph/VersionSetSpecifier.swift b/Sources/PackageGraph/VersionSetSpecifier.swift
index e32a556ed65..6a20f9c81f3 100644
--- a/Sources/PackageGraph/VersionSetSpecifier.swift
+++ b/Sources/PackageGraph/VersionSetSpecifier.swift
@@ -254,7 +254,7 @@ extension VersionSetSpecifier {
         case (_, .any):
             return .empty
         case (.any, _):
-            fatalError()
+            fatalError("\(#file):\(#line) - Illegal call of \(#function) on left hand side value of `.any`")
         case (.empty, _):
             return .empty
         case (_, .empty):
diff --git a/Sources/QueryEngine/Query.swift b/Sources/QueryEngine/Query.swift
index d4f300c8d7f..de4e9e91087 100644
--- a/Sources/QueryEngine/Query.swift
+++ b/Sources/QueryEngine/Query.swift
@@ -156,7 +156,7 @@ extension HashEncoder: UnkeyedEncodingContainer {
     }
 
     func superEncoder() -> any Encoder {
-        fatalError()
+        fatalError("\(#file):\(#line) - Illegal call of function \(#function)")
     }
 }
 
@@ -272,11 +272,11 @@ extension HashEncoder {
         }
 
         mutating func superEncoder() -> any Encoder {
-            fatalError()
+            fatalError("\(#file):\(#line) - Illegal call of function \(#function)")
         }
 
         mutating func superEncoder(forKey key: K) -> any Encoder {
-            fatalError()
+            fatalError("\(#file):\(#line) - Illegal call of function \(#function)")
         }
 
         typealias Key = K
diff --git a/Sources/Runtimes/PackageDescription/PackageDependency.swift b/Sources/Runtimes/PackageDescription/PackageDependency.swift
index 06cf9912343..c61729bc397 100644
--- a/Sources/Runtimes/PackageDescription/PackageDependency.swift
+++ b/Sources/Runtimes/PackageDescription/PackageDependency.swift
@@ -165,7 +165,7 @@ extension Package {
                 traits: traits
             )
         }
-        
+
         convenience init(
             name: String?,
             location: String,
@@ -181,7 +181,7 @@ extension Package {
                 traits: traits
             )
         }
-        
+
         convenience init(
             id: String,
             requirement: RegistryRequirement,
@@ -1067,7 +1067,7 @@ extension Package.Dependency {
     /// ```swift
     /// .package(id: "scope.name", "1.2.3"..."1.2.6"),
     /// ```
-    /// 
+    ///
     /// If the package you depend on defines traits, the package manager uses the dependency with its default set of traits.
     ///
     /// - Parameters:
@@ -1140,11 +1140,11 @@ extension Package.Dependency {
 extension Package.Dependency {
     @available(*, unavailable, message: "use package(url:exact:) instead")
     public static func package(url: String, version: Version) -> Package.Dependency {
-        fatalError()
+        fatalError("\(#file):\(#line) - Illegal call of deprecated function \(#function)")
     }
 
     @available(*, unavailable, message: "use package(url:_:) instead")
     public static func package(url: String, range: Range<Version>) -> Package.Dependency {
-        fatalError()
+        fatalError("\(#file):\(#line) - Illegal call of deprecated function \(#function)")
     }
 }
diff --git a/Sources/SPMBuildCore/BuildParameters/BuildParameters.swift b/Sources/SPMBuildCore/BuildParameters/BuildParameters.swift
index a9fe2744794..27b65aaa7ab 100644
--- a/Sources/SPMBuildCore/BuildParameters/BuildParameters.swift
+++ b/Sources/SPMBuildCore/BuildParameters/BuildParameters.swift
@@ -332,7 +332,7 @@ public struct BuildParameters: Encodable {
         case .library(.dynamic):
             return try dynamicLibraryPath(for: product.name)
         case .library(.automatic), .plugin:
-            fatalError()
+            fatalError("\(#file):\(#line) - Illegal call of function \(#function) with automatica library and plugin")
         case .test:
             switch buildSystemKind {
             case .native, .xcode:
diff --git a/Sources/SwiftBuildSupport/PackagePIFBuilder.swift b/Sources/SwiftBuildSupport/PackagePIFBuilder.swift
index 6e1abe5ac9d..269a941787b 100644
--- a/Sources/SwiftBuildSupport/PackagePIFBuilder.swift
+++ b/Sources/SwiftBuildSupport/PackagePIFBuilder.swift
@@ -403,7 +403,7 @@ public final class PackagePIFBuilder {
             case .packageProduct: .packageProduct
             case .hostBuildTool: fatalError("Unexpected hostBuildTool type")
             @unknown default:
-                fatalError()
+                fatalError("Unknown product type: \(pifProductType)")
             }
         }
     }