{"record":{"id":"30855f56bbd2304b","repo":"charmbracelet/crush","slug":"job-s-error-executing-command-w","errorCode":null,"errorMessage":"[Job %s] error executing command: %w","messagePattern":"\\[Job (.+?)\\] error executing command: %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"internal/agent/tools/bash.go","lineNumber":270,"sourceCode":"\t\t\t\tbgManager.Cleanup()\n\t\t\t\t// Use background context so it continues after tool returns\n\t\t\t\tbgShell, err := bgManager.Start(context.Background(), execWorkingDir, blockFuncs(), params.Command, params.Description)\n\t\t\t\tif err != nil {\n\t\t\t\t\treturn fantasy.ToolResponse{}, fmt.Errorf(\"error starting background shell: %w\", err)\n\t\t\t\t}\n\n\t\t\t\t// Wait a short time to detect fast failures (blocked commands, syntax errors, etc.)\n\t\t\t\ttime.Sleep(1 * time.Second)\n\t\t\t\tstdout, stderr, done, execErr := bgShell.GetOutput()\n\n\t\t\t\tif done {\n\t\t\t\t\t// Command failed or completed very quickly\n\t\t\t\t\tbgManager.Remove(bgShell.ID)\n\n\t\t\t\t\tinterrupted := shell.IsInterrupt(execErr)\n\t\t\t\t\texitCode := shell.ExitCode(execErr)\n\t\t\t\t\tif exitCode == 0 && !interrupted && execErr != nil {\n\t\t\t\t\t\treturn fantasy.ToolResponse{}, fmt.Errorf(\"[Job %s] error executing command: %w\", bgShell.ID, execErr)\n\t\t\t\t\t}\n\n\t\t\t\t\tstdout = formatOutput(stdout, stderr, execErr)\n\n\t\t\t\t\tmetadata := BashResponseMetadata{\n\t\t\t\t\t\tStartTime:        startTime.UnixMilli(),\n\t\t\t\t\t\tEndTime:          time.Now().UnixMilli(),\n\t\t\t\t\t\tOutput:           stdout,\n\t\t\t\t\t\tDescription:      params.Description,\n\t\t\t\t\t\tBackground:       params.RunInBackground,\n\t\t\t\t\t\tWorkingDirectory: bgShell.WorkingDir,\n\t\t\t\t\t}\n\t\t\t\t\tif stdout == \"\" {\n\t\t\t\t\t\treturn fantasy.WithResponseMetadata(fantasy.NewTextResponse(BashNoOutput), metadata), nil\n\t\t\t\t\t}\n\t\t\t\t\tstdout += fmt.Sprintf(\"\\n\\n<cwd>%s</cwd>\", normalizeWorkingDir(bgShell.WorkingDir))\n\t\t\t\t\treturn fantasy.WithResponseMetadata(fantasy.NewTextResponse(stdout), metadata), nil\n\t\t\t\t}","sourceCodeStart":252,"sourceCodeEnd":288,"githubUrl":"https://github.com/charmbracelet/crush/blob/7944b8e52225d8805e31eacbf7ef24856b0dfb7a/internal/agent/tools/bash.go#L252-L288","documentation":"After starting a RunInBackground command, the tool waits 1 second to catch fast failures. If the process already finished (done) and returned a non-zero-ish execErr that is neither an interrupt nor a normal exit code, it is treated as a spawn/execution failure and reported as '[Job <id>] error executing command' wrapping execErr.","triggerScenarios":"A background command terminates within the 1-second probe window with an error whose ExitCode is 0 but err != nil and IsInterrupt is false — e.g. the shell failed to exec the command, the command was blocked by the blocker functions, or a shell-level setup error occurred rather than a normal non-zero exit.","commonSituations":"Command blocked by a block-list function (e.g. git push --force style blockers) causing an abnormal termination; shell syntax/setup failure that produces an error without a standard exit code; binary not executable so exec fails after start.","solutions":["Read the wrapped cause and the job's stderr to see why the command died abnormally","Remove or reformulate blocked commands (check the blocker list: curl|bash pipes, git push --force, yarn global add, go test -exec, etc.)","Make the command executable/valid (chmod +x, fix interpreter shebang, correct syntax)","If it is a legitimate command that exits non-zero, run it in the foreground to get the proper non-zero-exit response instead of this error path"],"exampleFix":"// before (blocked/invalid)\nBash(command=\"git push --force\", run_in_background=true)\n// after\nBash(command=\"git push --force-with-lease\")","handlingStrategy":"type-guard","validationCode":"// Prefer foreground for short-lived commands; background only for long-running ones\nclassify := func(dur time.Duration) bool { return dur > 30*time.Second }","typeGuard":"func isAbnormalExecFailure(err error) bool {\n    return err != nil && !shell.IsInterrupt(err) && shell.ExitCode(err) == 0\n}","tryCatchPattern":"if _, _, done, execErr := bgShell.GetOutput(); done && isAbnormalExecFailure(execErr) {\n    var ee *exec.ExitError\n    if errors.As(execErr, &ee) { /* inspect stderr */ }\n    // fall back: rerun in foreground to surface a normal non-zero exit result\n}","preventionTips":["Avoid blocked command patterns (pipe-to-shell, force pushes, blocked flags) in background calls","Ensure scripts have valid shebangs and exec permissions before backgrounding","Use foreground execution for commands expected to finish quickly so non-zero exits come back as normal output"],"tags":["go","shell","background-process","exit-code"],"backgroundTag":"command-execution-failed","analyzedSha":"7944b8e52225d8805e31eacbf7ef24856b0dfb7a","analyzedAt":"2026-08-29T12:48:59.079Z","schemaVersion":2},"datasetVersion":"2026-08-29T17:17:51.833Z"}