From 1b74f99d2e6ac9d3edfbe44544fba4f9675c230d Mon Sep 17 00:00:00 2001
From: nshkrdotcom <127063941+nshkrdotcom@users.noreply.github.com>
Date: Fri, 9 Jan 2026 12:10:24 -1000
Subject: [PATCH 1/3] [Fix]: Elixir 1.19 type system warnings (#489)

* Add struct pattern matches to fix type warnings in Connection, CLI, and Generator modules
* Update CI matrix with OTP 28.x and Elixir 1.19.x support
* Rename erlpack_notypes.ex to erlpack_notypes_test.exs
* Fix unreachable clause warning in report_exception_test.exs
* Bump version to v1.0.0-rc.2
---
 .github/workflows/ci.yml                      | 26 ++++++++++++++++---
 grpc_client/CHANGELOG.md                      | 18 +++++++++++++
 grpc_client/lib/grpc/client/connection.ex     | 15 ++++++++---
 grpc_client/mix.exs                           |  2 +-
 ...ck_notypes.ex => erlpack_notypes_test.exs} |  0
 grpc_core/mix.exs                             |  2 +-
 grpc_server/CHANGELOG.md                      | 17 ++++++++++++
 grpc_server/lib/grpc/protoc/cli.ex            | 12 ++++-----
 grpc_server/lib/grpc/protoc/generator.ex      |  5 +++-
 grpc_server/mix.exs                           |  2 +-
 .../server/adapters/report_exception_test.exs |  5 ++--
 mix.exs                                       |  7 +++--
 12 files changed, 86 insertions(+), 25 deletions(-)
 rename grpc_client/test/grpc/integration/{erlpack_notypes.ex => erlpack_notypes_test.exs} (100%)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3c64f97c8..32a655119 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -33,8 +33,17 @@ jobs:
     name: OTP ${{matrix.otp}} / Elixir ${{matrix.elixir}}
     strategy:
       matrix:
-        otp: [24.x, 25.x, 26.1.x]
-        elixir: [1.15.x]
+        otp: [24.x, 25.x, 26.1.x, 28.x]
+        elixir: [1.15.x, 1.19.x]
+        exclude:
+          - otp: 24.x
+            elixir: 1.19.x
+          - otp: 25.x
+            elixir: 1.19.x
+          - otp: 26.1.x
+            elixir: 1.19.x
+          - otp: 28.x
+            elixir: 1.15.x
 
     needs: check_format
     steps:
@@ -84,8 +93,17 @@ jobs:
     if: ${{ github.ref == 'refs/heads/master' }}
     strategy:
       matrix:
-        otp: [24.x, 25.x, 26.1.x]
-        elixir: [1.15.x]
+        otp: [24.x, 25.x, 26.1.x, 28.x]
+        elixir: [1.15.x, 1.19.x]
+        exclude:
+          - otp: 24.x
+            elixir: 1.19.x
+          - otp: 25.x
+            elixir: 1.19.x
+          - otp: 26.1.x
+            elixir: 1.19.x
+          - otp: 28.x
+            elixir: 1.15.x
 
     steps:
       - uses: actions/checkout@v3
diff --git a/grpc_client/CHANGELOG.md b/grpc_client/CHANGELOG.md
index 2bf2b0307..3dbae8891 100644
--- a/grpc_client/CHANGELOG.md
+++ b/grpc_client/CHANGELOG.md
@@ -1,5 +1,23 @@
 # Changelog
 
+## v1.0.0-rc.2 (2026-01-09)
+
+### Bug fixes
+
+  * Fix Elixir 1.19 type system warnings for struct updates in Connection module
+  * Rename erlpack_notypes.ex to erlpack_notypes_test.exs to follow test naming convention
+
+## v1.0.0-rc.1 (2025-12-02)
+
+### Enhancements
+
+  * Major restructuring: separated into distinct grpc_core, grpc_server, and grpc_client packages
+  * Refactor GRPC client setup - start supervisor in application (#483)
+
+### Bug fixes
+
+  * Fix Connection state created by build_direct_state (#480)
+
 ## v0.11.5 (2025-11-14)
 
 ### Enhancements
diff --git a/grpc_client/lib/grpc/client/connection.ex b/grpc_client/lib/grpc/client/connection.ex
index 87d573a0e..98af91d97 100644
--- a/grpc_client/lib/grpc/client/connection.ex
+++ b/grpc_client/lib/grpc/client/connection.ex
@@ -373,7 +373,14 @@ defmodule GRPC.Client.Connection do
     |> Enum.uniq()
   end
 
-  defp build_balanced_state(base_state, addresses, config, lb_policy_opt, norm_opts, adapter) do
+  defp build_balanced_state(
+         %__MODULE__{} = base_state,
+         addresses,
+         config,
+         lb_policy_opt,
+         norm_opts,
+         adapter
+       ) do
     lb_policy =
       cond do
         is_map(config) and Map.has_key?(config, :load_balancing_policy) ->
@@ -415,7 +422,7 @@ defmodule GRPC.Client.Connection do
     end
   end
 
-  defp build_direct_state(base_state, norm_target, norm_opts, adapter) do
+  defp build_direct_state(%__MODULE__{} = base_state, norm_target, norm_opts, adapter) do
     {host, port} = split_host_port(norm_target)
     vc = base_state.virtual_channel
 
@@ -433,7 +440,7 @@ defmodule GRPC.Client.Connection do
     end
   end
 
-  defp build_real_channels(addresses, virtual_channel, norm_opts, adapter) do
+  defp build_real_channels(addresses, %Channel{} = virtual_channel, norm_opts, adapter) do
     Map.new(addresses, fn %{port: port, address: host} ->
       case connect_real_channel(
              %Channel{virtual_channel | host: host, port: port},
@@ -501,7 +508,7 @@ defmodule GRPC.Client.Connection do
     |> adapter.connect(opts[:adapter_opts])
   end
 
-  defp connect_real_channel(vc, host, port, opts, adapter) do
+  defp connect_real_channel(%Channel{} = vc, host, port, opts, adapter) do
     %Channel{vc | host: host, port: port}
     |> adapter.connect(opts[:adapter_opts])
   end
diff --git a/grpc_client/mix.exs b/grpc_client/mix.exs
index 7e01b3a38..3bc3fe271 100644
--- a/grpc_client/mix.exs
+++ b/grpc_client/mix.exs
@@ -2,7 +2,7 @@ defmodule GrpcClient.MixProject do
   use Mix.Project
 
   @source_url "https://github.com/elixir-grpc/grpc_client"
-  @version "1.0.0-rc.1"
+  @version "1.0.0-rc.2"
 
   def project do
     [
diff --git a/grpc_client/test/grpc/integration/erlpack_notypes.ex b/grpc_client/test/grpc/integration/erlpack_notypes_test.exs
similarity index 100%
rename from grpc_client/test/grpc/integration/erlpack_notypes.ex
rename to grpc_client/test/grpc/integration/erlpack_notypes_test.exs
diff --git a/grpc_core/mix.exs b/grpc_core/mix.exs
index 42d5706d3..ecd41daf0 100644
--- a/grpc_core/mix.exs
+++ b/grpc_core/mix.exs
@@ -2,7 +2,7 @@ defmodule GRPC.Core.MixProject do
   use Mix.Project
 
   @source_url "https://github.com/elixir-grpc/grpc_core"
-  @version "1.0.0-rc.1"
+  @version "1.0.0-rc.2"
 
   def project do
     [
diff --git a/grpc_server/CHANGELOG.md b/grpc_server/CHANGELOG.md
index 2bf2b0307..82fdc9c21 100644
--- a/grpc_server/CHANGELOG.md
+++ b/grpc_server/CHANGELOG.md
@@ -1,5 +1,22 @@
 # Changelog
 
+## v1.0.0-rc.2 (2026-01-09)
+
+### Bug fixes
+
+  * Fix Elixir 1.19 type system warnings for struct updates in protoc CLI and generator
+  * Fix unreachable clause warning in report_exception_test.exs
+
+## v1.0.0-rc.1 (2025-12-02)
+
+### Enhancements
+
+  * Major restructuring: separated into distinct grpc_core, grpc_server, and grpc_client packages
+
+### Bug fixes
+
+  * Fix Stream map_error send_response handling (#487)
+
 ## v0.11.5 (2025-11-14)
 
 ### Enhancements
diff --git a/grpc_server/lib/grpc/protoc/cli.ex b/grpc_server/lib/grpc/protoc/cli.ex
index 0a468ac41..26d228fff 100644
--- a/grpc_server/lib/grpc/protoc/cli.ex
+++ b/grpc_server/lib/grpc/protoc/cli.ex
@@ -83,11 +83,11 @@ defmodule GRPC.Protoc.CLI do
     |> Enum.reduce(ctx, &parse_param/2)
   end
 
-  defp parse_param("plugins=" <> plugins, ctx) do
+  defp parse_param("plugins=" <> plugins, %Context{} = ctx) do
     %Context{ctx | plugins: String.split(plugins, "+")}
   end
 
-  defp parse_param("gen_descriptors=" <> value, ctx) do
+  defp parse_param("gen_descriptors=" <> value, %Context{} = ctx) do
     case value do
       "true" ->
         %Context{ctx | gen_descriptors?: true}
@@ -97,7 +97,7 @@ defmodule GRPC.Protoc.CLI do
     end
   end
 
-  defp parse_param("package_prefix=" <> package, ctx) do
+  defp parse_param("package_prefix=" <> package, %Context{} = ctx) do
     if package == "" do
       raise "package_prefix can't be empty"
     else
@@ -105,11 +105,11 @@ defmodule GRPC.Protoc.CLI do
     end
   end
 
-  defp parse_param("transform_module=" <> module, ctx) do
+  defp parse_param("transform_module=" <> module, %Context{} = ctx) do
     %Context{ctx | transform_module: Module.concat([module])}
   end
 
-  defp parse_param("one_file_per_module=" <> value, ctx) do
+  defp parse_param("one_file_per_module=" <> value, %Context{} = ctx) do
     case value do
       "true" ->
         %Context{ctx | one_file_per_module?: true}
@@ -129,7 +129,7 @@ defmodule GRPC.Protoc.CLI do
   #   end
   # end
 
-  defp parse_param(_unknown, ctx) do
+  defp parse_param(_unknown, %Context{} = ctx) do
     ctx
   end
 
diff --git a/grpc_server/lib/grpc/protoc/generator.ex b/grpc_server/lib/grpc/protoc/generator.ex
index f7586885a..dc5e0768e 100644
--- a/grpc_server/lib/grpc/protoc/generator.ex
+++ b/grpc_server/lib/grpc/protoc/generator.ex
@@ -40,7 +40,10 @@ defmodule GRPC.Protoc.Generator do
     end
   end
 
-  defp generate_module_definitions(ctx, %Google.Protobuf.FileDescriptorProto{} = desc) do
+  defp generate_module_definitions(
+         %Context{} = ctx,
+         %Google.Protobuf.FileDescriptorProto{} = desc
+       ) do
     ctx =
       %Context{
         ctx
diff --git a/grpc_server/mix.exs b/grpc_server/mix.exs
index f34e572a4..3b9b2bee4 100644
--- a/grpc_server/mix.exs
+++ b/grpc_server/mix.exs
@@ -2,7 +2,7 @@ defmodule GRPC.Server.MixProject do
   use Mix.Project
 
   @source_url "https://github.com/elixir-grpc/grpc_server"
-  @version "1.0.0-rc.1"
+  @version "1.0.0-rc.2"
 
   def project do
     [
diff --git a/grpc_server/test/grpc/server/adapters/report_exception_test.exs b/grpc_server/test/grpc/server/adapters/report_exception_test.exs
index 975f3e3f2..b87f0182e 100644
--- a/grpc_server/test/grpc/server/adapters/report_exception_test.exs
+++ b/grpc_server/test/grpc/server/adapters/report_exception_test.exs
@@ -14,9 +14,8 @@ defmodule ExceptionServer do
 
   @impl true
   def handle_cast(:case_boom, state) do
-    a = fn -> :ok end
-
-    case a.() do
+    # Use Function.identity/1 to make value opaque to type inference
+    case Function.identity(:ok) do
       :error -> :boom
     end
 
diff --git a/mix.exs b/mix.exs
index a227268a1..1c3477c8b 100644
--- a/mix.exs
+++ b/mix.exs
@@ -1,7 +1,7 @@
 defmodule GRPC.GRPCRoot do
   use Mix.Project
 
-  @version "1.0.0-rc.1"
+  @version "1.0.0-rc.2"
 
   def project do
     [
@@ -14,10 +14,10 @@ defmodule GRPC.GRPCRoot do
 
   defp deps do
     [
-      {:grpc_server, path: "grpc_server"},
+      {:grpc_server, path: "grpc_server"}
     ]
   end
- 
+
   defp aliases do
     [
       setup: cmd("deps.get"),
@@ -42,5 +42,4 @@ defmodule GRPC.GRPCRoot do
       end
     end
   end
-
 end

From 26ee053b6377bdc8a26f62a635893a2dd8513002 Mon Sep 17 00:00:00 2001
From: nshkrdotcom <127063941+nshkrdotcom@users.noreply.github.com>
Date: Fri, 9 Jan 2026 12:29:38 -1000
Subject: [PATCH 2/3] [Chore]: Revert version bump to v1.0.0-rc.1

---
 grpc_client/CHANGELOG.md | 9 ++-------
 grpc_client/mix.exs      | 2 +-
 grpc_core/mix.exs        | 2 +-
 grpc_server/CHANGELOG.md | 9 ++-------
 grpc_server/mix.exs      | 2 +-
 mix.exs                  | 2 +-
 6 files changed, 8 insertions(+), 18 deletions(-)

diff --git a/grpc_client/CHANGELOG.md b/grpc_client/CHANGELOG.md
index 3dbae8891..3d144052d 100644
--- a/grpc_client/CHANGELOG.md
+++ b/grpc_client/CHANGELOG.md
@@ -1,12 +1,5 @@
 # Changelog
 
-## v1.0.0-rc.2 (2026-01-09)
-
-### Bug fixes
-
-  * Fix Elixir 1.19 type system warnings for struct updates in Connection module
-  * Rename erlpack_notypes.ex to erlpack_notypes_test.exs to follow test naming convention
-
 ## v1.0.0-rc.1 (2025-12-02)
 
 ### Enhancements
@@ -16,6 +9,8 @@
 
 ### Bug fixes
 
+  * Fix Elixir 1.19 type system warnings for struct updates in Connection module
+  * Rename erlpack_notypes.ex to erlpack_notypes_test.exs to follow test naming convention
   * Fix Connection state created by build_direct_state (#480)
 
 ## v0.11.5 (2025-11-14)
diff --git a/grpc_client/mix.exs b/grpc_client/mix.exs
index 3bc3fe271..7e01b3a38 100644
--- a/grpc_client/mix.exs
+++ b/grpc_client/mix.exs
@@ -2,7 +2,7 @@ defmodule GrpcClient.MixProject do
   use Mix.Project
 
   @source_url "https://github.com/elixir-grpc/grpc_client"
-  @version "1.0.0-rc.2"
+  @version "1.0.0-rc.1"
 
   def project do
     [
diff --git a/grpc_core/mix.exs b/grpc_core/mix.exs
index ecd41daf0..42d5706d3 100644
--- a/grpc_core/mix.exs
+++ b/grpc_core/mix.exs
@@ -2,7 +2,7 @@ defmodule GRPC.Core.MixProject do
   use Mix.Project
 
   @source_url "https://github.com/elixir-grpc/grpc_core"
-  @version "1.0.0-rc.2"
+  @version "1.0.0-rc.1"
 
   def project do
     [
diff --git a/grpc_server/CHANGELOG.md b/grpc_server/CHANGELOG.md
index 82fdc9c21..7e8489de3 100644
--- a/grpc_server/CHANGELOG.md
+++ b/grpc_server/CHANGELOG.md
@@ -1,12 +1,5 @@
 # Changelog
 
-## v1.0.0-rc.2 (2026-01-09)
-
-### Bug fixes
-
-  * Fix Elixir 1.19 type system warnings for struct updates in protoc CLI and generator
-  * Fix unreachable clause warning in report_exception_test.exs
-
 ## v1.0.0-rc.1 (2025-12-02)
 
 ### Enhancements
@@ -15,6 +8,8 @@
 
 ### Bug fixes
 
+  * Fix Elixir 1.19 type system warnings for struct updates in protoc CLI and generator
+  * Fix unreachable clause warning in report_exception_test.exs
   * Fix Stream map_error send_response handling (#487)
 
 ## v0.11.5 (2025-11-14)
diff --git a/grpc_server/mix.exs b/grpc_server/mix.exs
index 3b9b2bee4..f34e572a4 100644
--- a/grpc_server/mix.exs
+++ b/grpc_server/mix.exs
@@ -2,7 +2,7 @@ defmodule GRPC.Server.MixProject do
   use Mix.Project
 
   @source_url "https://github.com/elixir-grpc/grpc_server"
-  @version "1.0.0-rc.2"
+  @version "1.0.0-rc.1"
 
   def project do
     [
diff --git a/mix.exs b/mix.exs
index 1c3477c8b..30d173526 100644
--- a/mix.exs
+++ b/mix.exs
@@ -1,7 +1,7 @@
 defmodule GRPC.GRPCRoot do
   use Mix.Project
 
-  @version "1.0.0-rc.2"
+  @version "1.0.0-rc.1"
 
   def project do
     [

From 3cec4f8c010c7869e20ccc5068872e29faecd1a9 Mon Sep 17 00:00:00 2001
From: nshkrdotcom <127063941+nshkrdotcom@users.noreply.github.com>
Date: Fri, 9 Jan 2026 12:43:37 -1000
Subject: [PATCH 3/3] [Chore]: Revert Elixir 1.19 type warning fixes

* Simplify CI matrix to use include instead of exclude for OTP 28.x/Elixir 1.19.x
* Remove changelog entries for type warning fixes
* Revert report_exception_test.exs to use direct raise
* Apply YAML formatting fixes
---
 .github/workflows/ci.yml                      | 57 +++++++++----------
 grpc_client/CHANGELOG.md                      |  2 -
 grpc_server/CHANGELOG.md                      |  2 -
 .../server/adapters/report_exception_test.exs |  5 +-
 4 files changed, 28 insertions(+), 38 deletions(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 32a655119..4653651f2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,6 +1,7 @@
+---
 name: CI
 
-on:
+'on':
   pull_request:
     branches:
       - "**"
@@ -20,10 +21,12 @@ jobs:
           elixir-version: 1.15.x
       - name: Retrieve dependencies cache
         uses: actions/cache@v3
-        id: mix-cache # id to use in retrieve action
+        id: mix-cache  # id to use in retrieve action
         with:
           path: deps
-          key: v1-${{ matrix.os }}-${{ matrix.otp }}-${{ matrix.elixir }}-mix-${{ hashFiles(format('{0}{1}', github.workspace, '/mix.lock')) }}
+          key: >-
+            v1-${{ matrix.os }}-${{ matrix.otp }}-${{ matrix.elixir }}-mix-${{
+            hashFiles(format('{0}{1}', github.workspace, '/mix.lock')) }}
       - name: Install Dependencies
         run: mix deps.get 1>/dev/null
       - name: Check format
@@ -33,17 +36,11 @@ jobs:
     name: OTP ${{matrix.otp}} / Elixir ${{matrix.elixir}}
     strategy:
       matrix:
-        otp: [24.x, 25.x, 26.1.x, 28.x]
-        elixir: [1.15.x, 1.19.x]
-        exclude:
-          - otp: 24.x
-            elixir: 1.19.x
-          - otp: 25.x
-            elixir: 1.19.x
-          - otp: 26.1.x
-            elixir: 1.19.x
+        otp: [24.x, 25.x, 26.1.x]
+        elixir: [1.15.x]
+        include:
           - otp: 28.x
-            elixir: 1.15.x
+            elixir: 1.19.x
 
     needs: check_format
     steps:
@@ -54,10 +51,12 @@ jobs:
           elixir-version: ${{matrix.elixir}}
       - name: Retrieve dependencies cache
         uses: actions/cache@v3
-        id: mix-cache # id to use in retrieve action
+        id: mix-cache  # id to use in retrieve action
         with:
           path: deps
-          key: v1-${{ matrix.os }}-${{ matrix.otp }}-${{ matrix.elixir }}-mix-${{ hashFiles(format('{0}{1}', github.workspace, '/mix.lock')) }}
+          key: >-
+            v1-${{ matrix.os }}-${{ matrix.otp }}-${{ matrix.elixir }}-mix-${{
+            hashFiles(format('{0}{1}', github.workspace, '/mix.lock')) }}
       - name: Install Dependencies
         run: mix setup 1>/dev/null
       - name: Run Tests
@@ -75,10 +74,12 @@ jobs:
           elixir-version: 1.15.x
       - name: Retrieve dependencies cache
         uses: actions/cache@v3
-        id: mix-cache # id to use in retrieve action
+        id: mix-cache  # id to use in retrieve action
         with:
           path: deps
-          key: v1-${{ matrix.os }}-${{ matrix.otp }}-${{ matrix.elixir }}-mix-${{ hashFiles(format('{0}{1}', github.workspace, '/mix.lock')) }}
+          key: >-
+            v1-${{ matrix.os }}-${{ matrix.otp }}-${{ matrix.elixir }}-mix-${{
+            hashFiles(format('{0}{1}', github.workspace, '/mix.lock')) }}
       - name: Install Dependencies
         run: mix deps.get 1>/dev/null
         working-directory: ./interop
@@ -93,17 +94,11 @@ jobs:
     if: ${{ github.ref == 'refs/heads/master' }}
     strategy:
       matrix:
-        otp: [24.x, 25.x, 26.1.x, 28.x]
-        elixir: [1.15.x, 1.19.x]
-        exclude:
-          - otp: 24.x
-            elixir: 1.19.x
-          - otp: 25.x
-            elixir: 1.19.x
-          - otp: 26.1.x
-            elixir: 1.19.x
+        otp: [24.x, 25.x, 26.1.x]
+        elixir: [1.15.x]
+        include:
           - otp: 28.x
-            elixir: 1.15.x
+            elixir: 1.19.x
 
     steps:
       - uses: actions/checkout@v3
@@ -113,13 +108,15 @@ jobs:
           elixir-version: ${{ matrix.elixir }}
       - name: Retrieve dependencies cache
         uses: actions/cache@v3
-        id: mix-cache # id to use in retrieve action
+        id: mix-cache  # id to use in retrieve action
         with:
           path: deps
-          key: v1-${{ matrix.os }}-${{ matrix.otp }}-${{ matrix.elixir }}-mix-${{ hashFiles(format('{0}{1}', github.workspace, '/mix.lock')) }}
+          key: >-
+            v1-${{ matrix.os }}-${{ matrix.otp }}-${{ matrix.elixir }}-mix-${{
+            hashFiles(format('{0}{1}', github.workspace, '/mix.lock')) }}
       - name: Install Dependencies
         run: mix deps.get 1>/dev/null
         working-directory: ./interop
       - name: Run interop tests
         run: mix run script/run.exs
-        working-directory: ./interop
\ No newline at end of file
+        working-directory: ./interop
diff --git a/grpc_client/CHANGELOG.md b/grpc_client/CHANGELOG.md
index 3d144052d..5902cd70d 100644
--- a/grpc_client/CHANGELOG.md
+++ b/grpc_client/CHANGELOG.md
@@ -9,8 +9,6 @@
 
 ### Bug fixes
 
-  * Fix Elixir 1.19 type system warnings for struct updates in Connection module
-  * Rename erlpack_notypes.ex to erlpack_notypes_test.exs to follow test naming convention
   * Fix Connection state created by build_direct_state (#480)
 
 ## v0.11.5 (2025-11-14)
diff --git a/grpc_server/CHANGELOG.md b/grpc_server/CHANGELOG.md
index 7e8489de3..b7454ac21 100644
--- a/grpc_server/CHANGELOG.md
+++ b/grpc_server/CHANGELOG.md
@@ -8,8 +8,6 @@
 
 ### Bug fixes
 
-  * Fix Elixir 1.19 type system warnings for struct updates in protoc CLI and generator
-  * Fix unreachable clause warning in report_exception_test.exs
   * Fix Stream map_error send_response handling (#487)
 
 ## v0.11.5 (2025-11-14)
diff --git a/grpc_server/test/grpc/server/adapters/report_exception_test.exs b/grpc_server/test/grpc/server/adapters/report_exception_test.exs
index b87f0182e..f21a0702f 100644
--- a/grpc_server/test/grpc/server/adapters/report_exception_test.exs
+++ b/grpc_server/test/grpc/server/adapters/report_exception_test.exs
@@ -14,10 +14,7 @@ defmodule ExceptionServer do
 
   @impl true
   def handle_cast(:case_boom, state) do
-    # Use Function.identity/1 to make value opaque to type inference
-    case Function.identity(:ok) do
-      :error -> :boom
-    end
+    raise CaseClauseError, term: :ok
 
     {:noreply, state}
   end