fix: panic when concurrency=0 (#4477)

.golangci.reference.yml

@@ -6,7 +6,8 @@
 
 # Options for analysis running.
 run:
-  # Number of CPUs to use when running golangci-lint.
+  # Number of operating system threads  (`GOMAXPROCS`) that can execute golangci-lint simultaneously.
+  # If it is explicitly set to 0 (i.e. not the default) then golangci-lint will automatically set the value to match Linux container CPU quota.
   # Default: the number of logical CPUs in the machine
   concurrency: 4
 

pkg/commands/run.go

@@ -157,7 +157,7 @@ func (c *runCommand) persistentPreRunE(cmd *cobra.Command, _ []string) error {
 
 	if c.cfg.Run.Concurrency == 0 {
 		// Automatically set GOMAXPROCS to match Linux container CPU quota.
-		_, _ = maxprocs.Set(nil)
+		_, _ = maxprocs.Set(maxprocs.Logger(c.log.Infof))
 	} else {
 		runtime.GOMAXPROCS(c.cfg.Run.Concurrency)
 	}