RegexMatchTimeoutException in Grpc.Tools.ProtoCompile.Execute when building proto files in csproj

[kikcorp]

Dear team, do you have if there are any ways to set a timeout or avoid this error during the building process?

In source code i can't see anything

https://github.com/grpc/grpc/blob/master/src/csharp/Grpc.Tools/ProtoCompile.cs#L129

/root/.nuget/packages/grpc.tools/2.59.0/build/_protobuf/Google.Protobuf.Tools.targets(291,5): error MSB4018: The "ProtoCompile" task failed unexpectedly.
/root/.nuget/packages/grpc.tools/2.59.0/build/_protobuf/Google.Protobuf.Tools.targets(291,5): error MSB4018: System.Text.RegularExpressions.RegexMatchTimeoutException: The Regex engine has timed out while trying to match a pattern to an input string. This can occur for many reasons, including very large inputs or excessive backtracking caused by nested quantifiers, back-references and other factors.
/root/.nuget/packages/grpc.tools/2.59.0/build/_protobuf/Google.Protobuf.Tools.targets(291,5): error MSB4018: at System.Text.RegularExpressions.RegexRunner.g__ThrowRegexTimeout|25_0()
/root/.nuget/packages/grpc.tools/2.59.0/build/_protobuf/Google.Protobuf.Tools.targets(291,5): error MSB4018: at Regex8_TryMatchAtCurrentPosition(RegexRunner, ReadOnlySpan1) /root/.nuget/packages/grpc.tools/2.59.0/build/_protobuf/Google.Protobuf.Tools.targets(291,5): error MSB4018: at Regex8_Scan(RegexRunner, ReadOnlySpan1)
/root/.nuget/packages/grpc.tools/2.59.0/build/_protobuf/Google.Protobuf.Tools.targets(291,5): error MSB4018: at System.Text.RegularExpressions.Regex.RunSingleMatch(RegexRunnerMode mode, Int32 prevlen, String input, Int32 beginning, Int32 length, Int32 startat)
/root/.nuget/packages/grpc.tools/2.59.0/build/_protobuf/Google.Protobuf.Tools.targets(291,5): error MSB4018: at System.Text.RegularExpressions.Regex.Match(String input)
/root/.nuget/packages/grpc.tools/2.59.0/build/_protobuf/Google.Protobuf.Tools.targets(291,5): error MSB4018: at Grpc.Tools.ProtoCompile.LogEventsFromTextOutput(String singleLine, MessageImportance messageImportance) in /var/local/git/grpc/src/csharp/Grpc.Tools/ProtoCompile.cs:line 594
/root/.nuget/packages/grpc.tools/2.59.0/build/_protobuf/Google.Protobuf.Tools.targets(291,5): error MSB4018: at Microsoft.Build.Utilities.ToolTask.LogMessagesFromStandardErrorOrOutput(Queue dataQueue, ManualResetEvent dataAvailableSignal, MessageImportance messageImportance, StandardOutputOrErrorQueueType queueType)
/root/.nuget/packages/grpc.tools/2.59.0/build/_protobuf/Google.Protobuf.Tools.targets(291,5): error MSB4018: at Microsoft.Build.Utilities.ToolTask.HandleToolNotifications(Process proc)
/root/.nuget/packages/grpc.tools/2.59.0/build/_protobuf/Google.Protobuf.Tools.targets(291,5): error MSB4018: at Microsoft.Build.Utilities.ToolTask.ExecuteTool(String pathToTool, String responseFileCommands, String commandLineCommands)
/root/.nuget/packages/grpc.tools/2.59.0/build/_protobuf/Google.Protobuf.Tools.targets(291,5): error MSB4018: at Microsoft.Build.Utilities.ToolTask.Execute()
/root/.nuget/packages/grpc.tools/2.59.0/build/_protobuf/Google.Protobuf.Tools.targets(291,5): error MSB4018: at Grpc.Tools.ProtoCompile.Execute() in /var/local/git/grpc/src/csharp/Grpc.Tools/ProtoCompile.cs:line 611
/root/.nuget/packages/grpc.tools/2.59.0/build/_protobuf/Google.Protobuf.Tools.targets(291,5): error MSB4018: at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute()
/root/.nuget/packages/grpc.tools/2.59.0/build/_protobuf/Google.Protobuf.Tools.targets(291,5): error MSB4018: at Microsoft.Build.BackEnd.TaskBuilder.ExecuteInstantiatedTask(ITaskExecutionHost taskExecutionHost, TaskLoggingContext taskLoggingContext, TaskHost taskHost, ItemBucket bucket, TaskExecutionMode howToExecuteTask)

[jzabroski]

The compiler uses regular expressions?

[tonydnewell]

There is no way to set the regex timeout. It is hard coded to 100 ms.

grpc/src/csharp/Grpc.Tools/ProtoCompile.cs

Line 129 in c54c69d

static readonly TimeSpan s_regexTimeout = TimeSpan.FromMilliseconds(100);

Regular expressions are used to parse error messages returned by the protoc compiler.

Is there a particular .proto file that is causing you problems?