Build the kernel snapshot not working

[daonguyen207]

I did as instructed (replacing C:\flutter with my path) but no kernel_snapshot file was generated.
C:\flutter\bin\cache\dart-sdk\bin\dart.exe ^ C:\flutter\bin\cache\dart-sdk\bin\snapshots\frontend_server.dart.snapshot ^ --sdk-root C:\flutter\bin\cache\artifacts\engine\common\flutter_patched_sdk_product ^ --target=flutter ^ --aot ^ --tfa ^ -Ddart.vm.product=true ^ --packages .packages ^ --output-dill build\kernel_snapshot.dill ^ --verbose ^ --depfile build\kernel_snapshot.d ^ package:my_app_name/main.dart

Here is my output message

package:my_app_name/main.dart
result 5ae6fa1a-1e49-4662-9dde-2017134c1ccb
Inputs: [file:////.vm.product=true]
Output: null
Was diagnostic message handler provided: yes
FileSystem: Null (provided: StandardFileSystem)
Additional Dills:
Packages uri: file:////.packages
Packages: null
Compile SDK: false
SDK root: null (provided: file:///C:/flutter/bin/cache/artifacts/engine/common/flutter_patched_sdk_product/)
SDK specification: null (provided: null)
SDK summary: null (provided: file:///C:/flutter/bin/cache/artifacts/engine/common/flutter_patched_sdk_product/platform_strong.dill)
Target: null (provided: null)
throwOnErrorsForDebugging: false
throwOnWarningsForDebugging: false
exit on problem: false
Embed sources: true
debugDump: false
verbose: true
verify: false

0:00:00.002823: Started building UriTranslator in 2ms.
0:00:00.003305: Read libraries file in 0ms.
0:00:00.005996: Read packages file in 2ms.
Inputs: [file:///~/.vm.product=true]
Output: null
Was diagnostic message handler provided: yes
FileSystem: Null (provided: StandardFileSystem)
Additional Dills:

• file:///C:/flutter/bin/cache/artifacts/engine/common/flutter_patched_sdk_product/platform_strong.dill
  Packages uri: file:///~/.packages
  Packages: null
  Compile SDK: false
  SDK root: null (provided: file:///C:/flutter/bin/cache/artifacts/engine/common/flutter_patched_sdk_product/)
  SDK specification: null (provided: null)
  SDK summary: null (provided: file:///C:/flutter/bin/cache/artifacts/engine/common/flutter_patched_sdk_product/platform_strong.dill)
  Target: null (provided: flutter)
  throwOnErrorsForDebugging: false
  throwOnWarningsForDebugging: false
  exit on problem: false
  Embed sources: true
  debugDump: false
  verbose: true
  verify: false

0:00:00.003882: Started building UriTranslator in 3ms.
0:00:00.004535: Read libraries file in 0ms.
0:00:00.007827: Read packages file in 2ms.
0:00:00.085345: Indexed 18 libraries (0 bytes) in 76.799ms, that is,
0.000 bytes/ms, and
4.267 ms/libraries.
Enabling colors as OS is Windows.
.vm.product=true: Error: Error when reading '.vm.product=true': The system cannot find the file specified.

0:00:00.109495: Built outlines for 1 compilation units (89 bytes) in 19.970ms, that is,
4.457 bytes/ms, and
19.970 ms/compilation unit.
0:00:00.129146: Resolved parts in 15ms.
0:00:00.130004: Applied patches in 0ms.
0:00:00.132395: Computed library scopes in 1ms.
0:00:00.133166: Resolved 0 types in 0ms.
0:00:00.134630: Computed variances of 0 type variables in 0ms.
0:00:00.135260: Computed default types for 0 type variables in 0ms.
0:00:00.166463: Checked class hierarchy in 30ms.
0:00:00.167558: Resolved 0 type-variable bounds in 0ms.
0:00:00.168314: Built component in 0ms.
0:00:00.168942: Installed Object as implicit superclass in 0ms.
0:00:00.169684: Installed synthetic constructors in 0ms.
0:00:00.170480: Resolved 0 constructors in 0ms.
0:00:00.171258: Linked component in 0ms.
0:00:00.172842: Computed core types in 0ms.
0:00:00.173468: Built class hierarchy in 0ms.
0:00:00.174145: Checked supertypes in 0ms.
0:00:00.174752: Built class hierarchy members in 0ms.
0:00:00.180789: Computed class hierarchy in 5ms.
0:00:00.181673: Computed show and hide elements in 0ms.
0:00:00.182451: Performed top level inference in 0ms.
0:00:00.183290: Checked 0 overrides in 0ms.
0:00:00.183907: Checked for restricted members inheritance in enums. in 0ms.
0:00:00.184524: Finished initializing formals in 0ms.
0:00:00.185125: Computed 0 combined member signatures in 0ms.
0:00:00.187623: Updated 0 classes in kernel hierarchy in 0ms.
0:00:00.188439: Added noSuchMethod forwarders in 0ms.
0:00:00.190229: Checked mixin declaration applications in 0ms.
0:00:00.190938: Build outline expressions in 0ms.
0:00:00.191581: Checked type arguments of supers against the bounds in 0ms.
0:00:00.192240: Checked redirecting factories in 0ms.
0:00:00.192902: Cloned default values of formals in 0ms.
0:00:00.193698: Building component in 0ms.
0:00:00.194613: Built bodies for 1 compilation units (89 bytes) in 0.151ms, that is,
589.404 bytes/ms, and
0.151 ms/compilation unit.
0:00:00.196896: Cloned default values of formals in 0ms.
0:00:00.197627: Finished deferred load tearoffs 0 in 0ms.
0:00:00.198307: Finished forwarders for 0 procedures in 0ms.
0:00:00.199463: Finished 0 native methods in 0ms.
0:00:00.200101: Finished 0 patch methods in 0ms.
0:00:00.200729: Finished constructors in 0ms.
0:00:00.202084: Evaluated constants in 0ms.
0:00:00.204515: Added constant coverage in 0ms.
0:00:00.206339: Transformed mixin applications in 0ms.
0:00:00.207024: Skipped ffi transformation in 0ms.
0:00:00.208074: Transformed async methods in 0ms.
0:00:00.210599: Lowering transformations performed in 1ms.
0:00:00.211495: Annotated call sites in 0ms.
0:00:00.212853: Generated component in 0ms.
.vm.product=true: Error: No 'main' method found.
Try adding a method named 'main' to your program.
5ae6fa1a-1e49-4662-9dde-2017134c1ccb
PS D:\lap_trinh_android\lap_trinh_fluter\kithoctap> C:\Users\daong\Documents\flutter\bin\cache\dart-sdk\bin\dart.exe C:\Users\daong\Documents\flutter\bin\cache\dart-sdk\bin\snapshots\frontend_server.dart.snapshot --sdk-root C:\Users\daong\Documents\flutter\bin\cache\artifacts\engine\common\flutter_patched_sdk_product --target=flutter --aot --tfa -Ddart.vm.product=true --packages .packages --output-dill build\kernel_snapshot.dill --verbose --depfile build\kernel_snapshot.d package:lib/main.dart
result 83dcd1b1-a17a-426e-84c7-d2f64169010b
Inputs: [file:////.vm.product=true]
Output: null
Was diagnostic message handler provided: yes
FileSystem: Null (provided: StandardFileSystem)
Additional Dills:
Packages uri: file:////.packages
Packages: null
Compile SDK: false
SDK root: null (provided: file:///C:/flutter/bin/cache/artifacts/engine/common/flutter_patched_sdk_product/)
SDK specification: null (provided: null)
SDK summary: null (provided: file:///C:/flutter/bin/cache/artifacts/engine/common/flutter_patched_sdk_product/platform_strong.dill)
Target: null (provided: null)
throwOnErrorsForDebugging: false
throwOnWarningsForDebugging: false
exit on problem: false
Embed sources: true
debugDump: false
verbose: true
verify: false

0:00:00.003531: Started building UriTranslator in 3ms.
0:00:00.004028: Read libraries file in 0ms.
0:00:00.021377: Read packages file in 16ms.
Inputs: [file:///~/.vm.product=true]
Output: null
Was diagnostic message handler provided: yes
FileSystem: Null (provided: StandardFileSystem)
Additional Dills:

• file:///C:/flutter/bin/cache/artifacts/engine/common/flutter_patched_sdk_product/platform_strong.dill
  Packages uri: file:///~/.packages
  Packages: null
  Compile SDK: false
  SDK root: null (provided: file:///C:/flutter/bin/cache/artifacts/engine/common/flutter_patched_sdk_product/)
  SDK specification: null (provided: null)
  SDK summary: null (provided: file:///C:/flutter/bin/cache/artifacts/engine/common/flutter_patched_sdk_product/platform_strong.dill)
  Target: null (provided: flutter)
  throwOnErrorsForDebugging: false
  throwOnWarningsForDebugging: false
  exit on problem: false
  Embed sources: true
  debugDump: false
  verbose: true
  verify: false

0:00:00.004159: Started building UriTranslator in 4ms.
0:00:00.007481: Read libraries file in 0ms.
0:00:00.011456: Read packages file in 2ms.
0:00:00.092807: Indexed 18 libraries (0 bytes) in 80.460ms, that is,
0.000 bytes/ms, and
4.470 ms/libraries.
Enabling colors as OS is Windows.
.vm.product=true: Error: Error when reading '.vm.product=true': The system cannot find the file specified.

0:00:00.118426: Built outlines for 1 compilation units (89 bytes) in 22.027ms, that is,
4.040 bytes/ms, and
22.027 ms/compilation unit.
0:00:00.140182: Resolved parts in 18ms.
0:00:00.143462: Applied patches in 0ms.
0:00:00.146454: Computed library scopes in 2ms.
0:00:00.148048: Resolved 0 types in 0ms.
0:00:00.149719: Computed variances of 0 type variables in 0ms.
0:00:00.150361: Computed default types for 0 type variables in 0ms.
0:00:00.186633: Checked class hierarchy in 35ms.
0:00:00.187813: Resolved 0 type-variable bounds in 0ms.
0:00:00.188620: Built component in 0ms.
0:00:00.189663: Installed Object as implicit superclass in 0ms.
0:00:00.190443: Installed synthetic constructors in 0ms.
0:00:00.191204: Resolved 0 constructors in 0ms.
0:00:00.192487: Linked component in 0ms.
0:00:00.195533: Computed core types in 0ms.
0:00:00.197404: Built class hierarchy in 0ms.
0:00:00.198486: Checked supertypes in 0ms.
0:00:00.199319: Built class hierarchy members in 0ms.
0:00:00.205759: Computed class hierarchy in 5ms.
0:00:00.206888: Computed show and hide elements in 0ms.
0:00:00.207896: Performed top level inference in 0ms.
0:00:00.208991: Checked 0 overrides in 0ms.
0:00:00.211660: Checked for restricted members inheritance in enums. in 0ms.
0:00:00.213829: Finished initializing formals in 0ms.
0:00:00.214683: Computed 0 combined member signatures in 0ms.
0:00:00.215533: Updated 0 classes in kernel hierarchy in 0ms.
0:00:00.216445: Added noSuchMethod forwarders in 0ms.
0:00:00.217110: Checked mixin declaration applications in 0ms.
0:00:00.217955: Build outline expressions in 0ms.
0:00:00.218618: Checked type arguments of supers against the bounds in 0ms.
0:00:00.219402: Checked redirecting factories in 0ms.
0:00:00.220259: Cloned default values of formals in 0ms.
0:00:00.221009: Building component in 0ms.
0:00:00.221808: Built bodies for 1 compilation units (89 bytes) in 0.134ms, that is,
664.179 bytes/ms, and
0.134 ms/compilation unit.
0:00:00.223583: Cloned default values of formals in 0ms.
0:00:00.230051: Finished deferred load tearoffs 0 in 0ms.
0:00:00.230792: Finished forwarders for 0 procedures in 0ms.
0:00:00.231510: Finished 0 native methods in 0ms.
0:00:00.232172: Finished 0 patch methods in 0ms.
0:00:00.232817: Finished constructors in 0ms.
0:00:00.234191: Evaluated constants in 0ms.
0:00:00.234896: Added constant coverage in 0ms.
0:00:00.235551: Transformed mixin applications in 0ms.
0:00:00.236547: Skipped ffi transformation in 0ms.
0:00:00.237560: Transformed async methods in 0ms.
0:00:00.239278: Lowering transformations performed in 0ms.
0:00:00.241752: Annotated call sites in 0ms.
0:00:00.246943: Generated component in 0ms.
.vm.product=true: Error: No 'main' method found.
Try adding a method named 'main' to your program.
83dcd1b1-a17a-426e-84c7-d2f64169010b