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Wrongful error on \b character in git config #1397

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#1399
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Wrongful error on \b character in git config#1397
#1399
@CEbbinghaus

Description

@CEbbinghaus
CEbbinghaus
opened on Mar 31, 2025

Error

C:\Program Files\dotnet\sdk\8.0.114\Sdks\Microsoft.Build.Tasks.Git\build\Microsoft.Build.Tasks.Git.targets(25,5): error : Error reading git repository information: Error parsing config line 13 in file '[Path To Repo]\.git\config': Unexpected character U+005c.

Breakdown

This error originiates from the following switch case which wrongfully throws on the \b escaped character despite that being explicitly mentioned by the git config documentation.

sourcelink/src/Microsoft.Build.Tasks.Git/GitDataReader/GitConfig.Reader.cs

Lines 557 to 589 in 0fceecb

switch (reader.Peek())
{
case '\r':
case '\n':
ReadToLineEnd(reader);
continue;
case 'n':
reader.Read();
builder.Append('\n');
// escaped \n is not considered trailing whitespace:
lengthIgnoringTrailingWhitespace = builder.Length;
continue;
case 't':
reader.Read();
builder.Append('\t');
// escaped \t is not considered trailing whitespace:
lengthIgnoringTrailingWhitespace = builder.Length;
continue;
case '\\':
case '"':
builder.Append((char)reader.Read());
lengthIgnoringTrailingWhitespace = builder.Length;
continue;
default:
reader.UnexpectedCharacter(c);
break;
}

source

The following escape sequences (beside " and \) are recognized: \n for newline character (NL), \t for horizontal tabulation (HT, TAB) and \b for backspace (BS). Other char escape sequences (including octal escape sequences) are invalid.

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