Repository navigation
expand: regression in handling of escape sequences in heredocs #1138
Description
I discovered a regression indirectly by using Task, which depends on mvdan/sh. See the below issue for the details:
go-task/task#2129
To summarize, mvdan/sh v3.11.0 is found to ignore the character escaping in this example script, so double backslash is taken literally instead of being parsed as an escape sequence that would result in a single backslash. The older version v3.10.0 takes the double slashes as an escape sequence, as expected. Below is the script I indirectly executed using the Task CLI tool:
cat <<EOF > ./test.txt
\\
EOF
Activity
mvdan commentedon Mar 19, 2025
Thanks. This was part of another fix for go-task, #1070, but it wasn't quite right.
[-]Regression: character escaping ignored[/-][+]expand: regression in handling of escape sequences in heredocs[/+]expand: heredocs unescape \$, \\, and \`, just not \"
chore(deps): update module mvdan.cc/sh/v3/cmd/shfmt to v3.12.0 (hetzn…