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Metal: iOS triggers exception
Regression since #7620
iOS isn't an important target for us but I like to keep it working so that libghostty remains iOS compatible.
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[_TtCV11Ghostty_iOS7Ghostty11SurfaceView addSublayer]: unrecognized selector sent to instance 0x103e0b9b0'
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[_TtCV11Ghostty_iOS7Ghostty11SurfaceView addSublayer]: unrecognized selector sent to instance 0x103e0b9b0'
*** First throw call stack:
(
0 CoreFoundation 0x00000001804c97d4 __exceptionPreprocess + 172
1 libobjc.A.dylib 0x00000001800937cc objc_exception_throw + 72
2 CoreFoundation 0x00000001804defe4 +[NSObject(NSObject) instanceMethodSignatureForSelector:] + 0
3 UIKitCore 0x0000000185c858d0 -[UIResponder doesNotRecognizeSelector:] + 232
4 CoreFoundation 0x00000001804cda2c ___forwarding___ + 1216
5 CoreFoundation 0x00000001804cff6c _CF_forwarding_prep_0 + 92
6 Ghostty-iOS.debug.dylib 0x0000000108df0258 msg_send.MsgSend(object.Object).msgSend__anon_410122 + 120
7 Ghostty-iOS.debug.dylib 0x0000000108defdf0 renderer.Metal.init + 692
8 Ghostty-iOS.debug.dylib 0x0000000108e0279c renderer.generic.Renderer(renderer.Metal).init + 148
9 Ghostty-iOS.debug.dylib 0x0000000108e0fea0 Surface.init + 1664
10 Ghostty-iOS.debug.dylib 0x0000000108e11ad8 apprt.embedded.Surface.init + 1328
11 Ghostty-iOS.debug.dylib 0x0000000108e122b0 apprt.embedded.App.newSurface + 180
12 Ghostty-iOS.debug.dylib 0x0000000108e12554 apprt.embedded.CAPI.surface_new_ + 68
13 Ghostty-iOS.debug.dylib 0x0000000108e1264c ghostty_surface_new + 100
14 Ghostty-iOS.debug.dylib 0x00000001079d50c4 $s11Ghostty_iOS0A0V11SurfaceViewC_10baseConfig4uuidAESv_AC0C13ConfigurationVSg10Foundation4UUIDVSgtcfcSvSgSo24ghostty_surface_config_sazXEfU_ + 52
15 Ghostty-iOS.debug.dylib 0x00000001079d50f4 $s11Ghostty_iOS0A0V11SurfaceViewC_10baseConfig4uuidAESv_AC0C13ConfigurationVSg10Foundation4UUIDVSgtcfcSvSgSo24ghostty_surface_config_sazXEfU_TA + 24
16 Ghostty-iOS.debug.dylib 0x00000001079c14d0 $s11Ghostty_iOS0A0V20SurfaceConfigurationV10withCValue4view_xAC0C4ViewC_xSo24ghostty_surface_config_sazKXEtKlFxSPys4Int8VGSgKXEfU_xAOKXEfU_xSayAOGKXEfU_xAPKXEfU_xSrySo0I10_env_var_saGzKXEfU_ + 23 17 Ghostty-iOS.debug.dylib 0x00000001079c78ec $s11Ghostty_iOS0A0V20SurfaceConfigurationV10withCValue4view_xAC0C4ViewC_xSo24ghostty_surface_config_sazKXEtKlFxSPys4Int8VGSgKXEfU_xAOKXEfU_xSayAOGKXEfU_xAPKXEfU_xSrySo0I10_env_var_saGzKXEfU_TA + 18 Ghostty-iOS.debug.dylib 0x00000001079c1604 $sSa30withUnsafeMutableBufferPointeryqd__qd__SryxGzqd_0_YKXEqd_0_YKs5ErrorRd_0_r0_lF + 232
19 Ghostty-iOS.debug.dylib 0x00000001079c128c $s11Ghostty_iOS0A0V20SurfaceConfigurationV10withCValue4view_xAC0C4ViewC_xSo24ghostty_surface_config_sazKXEtKlFxSPys4Int8VGSgKXEfU_xAOKXEfU_xSayAOGKXEfU_xAPKXEfU_ + 888
20 Ghostty-iOS.debug.dylib 0x00000001079c7814 $s11Ghostty_iOS0A0V20SurfaceConfigurationV10withCValue4view_xAC0C4ViewC_xSo24ghostty_surface_config_sazKXEtKlFxSPys4Int8VGSgKXEfU_xAOKXEfU_xSayAOGKXEfU_xAPKXEfU_TA + 52
21 Ghostty-iOS.debug.dylib 0x00000001079eadd8 $sSa11Ghostty_iOSSSRszlE12withCStringsyqd__qd__SaySPys4Int8VGSgGKXEKlF + 168
22 Ghostty-iOS.debug.dylib 0x00000001079c0eb0 $s11Ghostty_iOS0A0V20SurfaceConfigurationV10withCValue4view_xAC0C4ViewC_xSo24ghostty_surface_config_sazKXEtKlFxSPys4Int8VGSgKXEfU_xAOKXEfU_xSayAOGKXEfU_ + 324
23 Ghostty-iOS.debug.dylib 0x00000001079c77d0 $s11Ghostty_iOS0A0V20SurfaceConfigurationV10withCValue4view_xAC0C4ViewC_xSo24ghostty_surface_config_sazKXEtKlFxSPys4Int8VGSgKXEfU_xAOKXEfU_xSayAOGKXEfU_TA + 52
24 Ghostty-iOS.debug.dylib 0x00000001079eadd8 $sSa11Ghostty_iOSSSRszlE12withCStringsyqd__qd__SaySPys4Int8VGSgGKXEKlF + 168
25 Ghostty-iOS.debug.dylib 0x00000001079c0ce8 $s11Ghostty_iOS0A0V20SurfaceConfigurationV10withCValue4view_xAC0C4ViewC_xSo24ghostty_surface_config_sazKXEtKlFxSPys4Int8VGSgKXEfU_xAOKXEfU_ + 572
26 Ghostty-iOS.debug.dylib 0x00000001079c76b4 $s11Ghostty_iOS0A0V20SurfaceConfigurationV10withCValue4view_xAC0C4ViewC_xSo24ghostty_surface_config_sazKXEtKlFxSPys4Int8VGSgKXEfU_xAOKXEfU_TA + 48
27 Ghostty-iOS.debug.dylib 0x000000010799f184 $sSq11Ghostty_iOSSSRszlE11withCStringyqd__qd__SPys4Int8VGSgKXEKlF + 300
28 Ghostty-iOS.debug.dylib 0x00000001079c0a48 $s11Ghostty_iOS0A0V20SurfaceConfigurationV10withCValue4view_xAC0C4ViewC_xSo24ghostty_surface_config_sazKXEtKlFxSPys4Int8VGSgKXEfU_ + 208
29 Ghostty-iOS.debug.dylib 0x00000001079c3c48 $s11Ghostty_iOS0A0V20SurfaceConfigurationV10withCValue4view_xAC0C4ViewC_xSo24ghostty_surface_config_sazKXEtKlFxSPys4Int8VGSgKXEfU_TA + 48
30 Ghostty-iOS.debug.dylib 0x000000010799f184 $sSq11Ghostty_iOSSSRszlE11withCStringyqd__qd__SPys4Int8VGSgKXEKlF + 300
31 Ghostty-iOS.debug.dylib 0x00000001079c08d8 $s11Ghostty_iOS0A0V20SurfaceConfigurationV10withCValue4view_xAC0C4ViewC_xSo24ghostty_surface_config_sazKXEtKlF + 552
32 Ghostty-iOS.debug.dylib 0x00000001079d4d14 $s11Ghostty_iOS0A0V11SurfaceViewC_10baseConfig4uuidAESv_AC0C13ConfigurationVSg10Foundation4UUIDVSgtcfc + 1712
33 Ghostty-iOS.debug.dylib 0x00000001079d4654 $s11Ghostty_iOS0A0V11SurfaceViewC_10baseConfig4uuidAESv_AC0C13ConfigurationVSg10Foundation4UUIDVSgtcfC + 56
34 Ghostty-iOS.debug.dylib 0x00000001079b4980 $s11Ghostty_iOS0A0V13SurfaceForAppV_7contentAEy_xGSv_xAC0C4ViewCctcfcAIycfu_ + 168
35 SwiftUICore 0x00000001d4be05c4 $s7SwiftUI11StateObjectV3Box33_BDD24532CFCFEBA7264ABA5DE20A4002LLV6update8property5phaseSbACyxGz_AA12_GraphInputsV5PhaseVtFyyScMYcXEfU_TA + 40
36 SwiftUICore 0x00000001d4bdfa64 $sScM7SwiftUIE31assumeIsolatedIfLinkedOnOrAfter_7context_4file4linexAA9SemanticsV_SSSgxyKScMYcXEs12StaticStringVSutKs8SendableRzlFZyt_Tt5B5 + 556
37 SwiftUICore 0x00000001d4be0140 $s7SwiftUI11StateObjectV3Box33_BDD24532CFCFEBA7264ABA5DE20A4002LLV6update8property5phaseSbACyxGz_AA12_GraphInputsV5PhaseVtF + 224
38 SwiftUICore 0x00000001d4857c84 $s7SwiftUI9BoxVTable33_F3A89CF4357225EF49A7DD673FDFEE02LLC6update3elt8property5phaseSbAA34_UnsafeHeterogeneousBuffer_ElementV_SvAA12_GraphInputsV5PhaseVtFZ + 216
39 SwiftUICore 0x00000001d485790c $s7SwiftUI22_DynamicPropertyBufferV6update9container5phaseSbSv_AA12_GraphInputsV5PhaseVtF + 128
40 SwiftUICore 0x00000001d48caf7c $s7SwiftUI11DynamicBody33_A4C1D658B3717A3062FEFC91A812D6EBLLV11updateValueyyFyyXEfU_ySpy9ContainerQzGXEfU_ + 204
41 SwiftUICore 0x00000001d48cca78 $s7SwiftUI11DynamicBody33_A4C1D658B3717A3062FEFC91A812D6EBLLV11updateValueyyFyyXEfU_ySpy9ContainerQzGXEfU_TA + 28
42 SwiftUICore 0x00000001d48c9288 $ss17withUnsafePointer2to_q0_x_q0_SPyxGq_YKXEtq_YKs5ErrorR_Ri_zRi_0_r1_lF + 72
43 SwiftUICore 0x00000001d48caddc $s7SwiftUI11DynamicBody33_A4C1D658B3717A3062FEFC91A812D6EBLLV11updateValueyyFyyXEfU_ + 256
44 SwiftUICore 0x00000001d48caa38 $s7SwiftUI11DynamicBody33_A4C1D658B3717A3062FEFC91A812D6EBLLV11updateValueyyF + 640
45 SwiftUICore 0x00000001d4947d58 $s14AttributeGraph0A0VyACyxGqd__c5ValueQyd__RszAA12StatefulRuleRd__lufcADSPyqd__GXEfU_ySv_So11AGAttributeatcyXEfU_ySv_AJtcfu_TA + 28
46 AttributeGraph 0x00000001c00ca438 _ZN2AG5Graph11UpdateStack6updateEv + 516
47 AttributeGraph 0x00000001c00cac04 _ZN2AG5Graph16update_attributeENS_4data3ptrINS_4NodeEEEj + 428
48 AttributeGraph 0x00000001c00d24dc _ZN2AG5Graph20input_value_ref_slowENS_4data3ptrINS_4NodeEEENS_11AttributeIDEjjPK15AGSwiftMetadataRhl + 708
49 AttributeGraph 0x00000001c00e8054 AGGraphGetValue + 232
50 SwiftUICore 0x00000001d48ca958 $s7SwiftUI11DynamicBody33_A4C1D658B3717A3062FEFC91A812D6EBLLV11updateValueyyF + 416
51 SwiftUICore 0x00000001d4947d58 $s14AttributeGra
libc++abi: terminating due to uncaught exception of type NSException
Note: you can test this easily by building and running the Ghostty-iOS target with an iPhone 16 Pro simulator target. It crashes on startup.
I'll be honest, I didn't test iOS at all when writing that code. I think this needs to get the layer and add the sublayer, instead of trying to add a sublayer directly to the view
No problem @qwerasd205. It's not a big deal. Just wanted to make sure we created an issue tracking it so it doesn't bitrot. Its easy enough to test when we have time.
@mitchellh I was searching for iOS terminal apps today and was curious about Ghostty's (been using it mac since v1). With the new iPad OS 26 windows system, it looks way more useful.
Based on this issue, there is no plan to actually implement and support an iOS app in the near future right ?
The plan for iOS has been to produce a library that other iOS terminal app developers can embed. IIRC, you can't "just" have a terminal in iOS - you need to bundle a shell and basic commands (could be as simple as busybox, or as complicated as you want). So that really puts it out of scope for the Ghostty project.
We do want to fix any issues that libghostty encounters on iOS though.
