docker build_error ai_generated true

failed to solve with frontend dockerfile.v0: failed to read dockerfile: error parsing dockerfile: unknown instruction: \

ID: docker/dockerfile-parse-error-line-continuation

Also available as: JSON · Markdown · 中文
88%Fix Rate
84%Confidence
1Evidence
2024-02-18First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
Docker 24.0.7 active — — —
Docker 25.0.1 active — — —

Root Cause

Trailing backslash used for line continuation in Dockerfile is not properly escaped or is followed by a space, causing parser to treat it as an instruction.

generic

中文

Dockerfile 中用于续行的尾随反斜杠未正确转义或后跟空格，导致解析器将其视为指令。

Official Documentation

https://docs.docker.com/engine/reference/builder/#run

Workarounds

  1. 90% success Ensure no trailing spaces after backslash: replace 'RUN apt-get update && \\n apt-get install -y curl' with proper formatting using a single line or array syntax. 
    Ensure no trailing spaces after backslash: replace 'RUN apt-get update && \\n    apt-get install -y curl' with proper formatting using a single line or array syntax.
  2. 85% success Use JSON array syntax for RUN to avoid line continuation issues: 'RUN ["apt-get", "update"]'. 
    Use JSON array syntax for RUN to avoid line continuation issues: 'RUN ["apt-get", "update"]'.

中文步骤

  1. 确保反斜杠后没有尾随空格：将 'RUN apt-get update && \\n    apt-get install -y curl' 替换为使用单行或数组语法的正确格式。
  2. 使用 JSON 数组语法进行 RUN 以避免续行问题：'RUN ["apt-get", "update"]'。

Dead Ends

Common approaches that don't work:

  1. 70% fail

    Removing the backslash entirely breaks multi-line RUN commands, causing syntax errors in shell.

  2. 90% fail

    Adding more backslashes compounds the parsing error without fixing the root cause.