Delete Mac mac_unopt > ci/ios_debug_unopt_sim

Currently we have Mac mac_unopt > ci/ios_debug_unopt_sim, but we also have Mac mac_unopt > ci/ios_debug_unopt_sim_arm64

The non-arm version of the test verifies that an x86 build of the engine works on a simulator.

Xcode no longer supports intel simulators and is dropping Rosetta support. We should just remove this build. The x86 simulator build will still be built in Mac mac_ios_engine > ci/ios_debug_sim, we're just not going to test it anymore.

flutter/engine/src/flutter/ci/builders/mac_unopt.json

Lines 266 to 330 in 1ceffd1

    
           { 
        
               "cas_archive": false, 
        
               "properties": { 
        
                   "$flutter/osx_sdk": { 
        
                       "runtime_versions": [ 
        
                           "ios-26-2_17c52" 
        
                       ], 
        
                       "sdk_version": "17c52" 
        
                   } 
        
               }, 
        
               "drone_dimensions": [ 
        
                   "device_type=none", 
        
                   "os=Mac-15.7", 
        
                   "cpu=x86" 
        
               ], 
        
               "gclient_variables": { 
        
                   "download_android_deps": false, 
        
                   "use_rbe": true 
        
               }, 
        
               "gn": [ 
        
                   "--ios", 
        
                   "--runtime-mode", 
        
                   "debug", 
        
                   "--simulator", 
        
                   "--no-lto", 
        
                   "--unoptimized", 
        
                   "--rbe", 
        
                   "--no-goma", 
        
                   "--xcode-symlinks", 
        
                   "--target-dir", 
        
                   "ci/ios_debug_unopt_sim" 
        
               ], 
        
               "name": "ci/ios_debug_unopt_sim", 
        
               "description": "Builds a debug mode engine for x64 iOS simulator. Runs unit tests and the scenario app tests.", 
        
               "ninja": { 
        
                   "config": "ci/ios_debug_unopt_sim", 
        
                   "targets": [ 
        
                       "flutter/testing/ios_scenario_app", 
        
                       "flutter/shell/platform/darwin/ios:ios_test_flutter" 
        
                   ] 
        
               }, 
        
               "tests": [ 
        
                   { 
        
                       "language": "python3", 
        
                       "name": "Tests for ios_debug_unopt_sim", 
        
                       "script": "flutter/testing/run_tests.py", 
        
                       "parameters": [ 
        
                           "--variant", 
        
                           "ci/ios_debug_unopt_sim", 
        
                           "--type", 
        
                           "objc", 
        
                           "--engine-capture-core-dump", 
        
                           "--ios-variant", 
        
                           "ci/ios_debug_unopt_sim" 
        
                       ] 
        
                   }, 
        
                   { 
        
                       "name": "Scenario App Integration Tests", 
        
                       "parameters": [ 
        
                           "ci/ios_debug_unopt_sim" 
        
                       ], 
        
                       "script": "flutter/testing/ios_scenario_app/run_ios_tests.sh" 
        
                   } 
        
               ] 
        
           },

This is required for us to migrate the arm64 bots to Xcode 27 while maintaining Xcode 26 on the intel bots.

We could alternatively pass --os-runtime com.apple.CoreSimulator.SimRuntime.iOS-26-2 to the tests

Remove `ios_debug_unopt_sim` builder from `Mac mac_unopt` (flutter#19…

This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.

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Delete `Mac mac_unopt > ci/ios_debug_unopt_sim` #192753

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	{
	"cas_archive": false,
	"properties": {
	"$flutter/osx_sdk": {
	"runtime_versions": [
	"ios-26-2_17c52"
	],
	"sdk_version": "17c52"
	}
	},
	"drone_dimensions": [
	"device_type=none",
	"os=Mac-15.7",
	"cpu=x86"
	],
	"gclient_variables": {
	"download_android_deps": false,
	"use_rbe": true
	},
	"gn": [
	"--ios",
	"--runtime-mode",
	"debug",
	"--simulator",
	"--no-lto",
	"--unoptimized",
	"--rbe",
	"--no-goma",
	"--xcode-symlinks",
	"--target-dir",
	"ci/ios_debug_unopt_sim"
	],
	"name": "ci/ios_debug_unopt_sim",
	"description": "Builds a debug mode engine for x64 iOS simulator. Runs unit tests and the scenario app tests.",
	"ninja": {
	"config": "ci/ios_debug_unopt_sim",
	"targets": [
	"flutter/testing/ios_scenario_app",
	"flutter/shell/platform/darwin/ios:ios_test_flutter"
	]
	},
	"tests": [
	{
	"language": "python3",
	"name": "Tests for ios_debug_unopt_sim",
	"script": "flutter/testing/run_tests.py",
	"parameters": [
	"--variant",
	"ci/ios_debug_unopt_sim",
	"--type",
	"objc",
	"--engine-capture-core-dump",
	"--ios-variant",
	"ci/ios_debug_unopt_sim"
	]
	},
	{
	"name": "Scenario App Integration Tests",
	"parameters": [
	"ci/ios_debug_unopt_sim"
	],
	"script": "flutter/testing/ios_scenario_app/run_ios_tests.sh"
	}
	]
	},

Delete Mac mac_unopt > ci/ios_debug_unopt_sim #192753

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vashworth commented on Sep 14, 2026

github-actions commented on Oct 3, 2026

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Delete `Mac mac_unopt > ci/ios_debug_unopt_sim` #192753