Grep skips invalid UTF-8

“The whole file is skipped, with no message.”

Is this your bug? What gets counted gets fixed. Pile on.

Paste this into your agent. It files your report, with your error and version.

I hit this bug: rapsheet.dev/sheets/claude-code/issues/3793/file
Follow it to file my report. Show me the text before you send.

No install. No account. Public and anonymous. The link asks your agent for one report, nothing else. What it sends

Bash tool grep skips files or input with invalid UTF-8. The embedded grep, run with -I, treats input with one invalid UTF-8 byte as binary, so the whole file is skipped with no message.

Is this your bug?

File my report

Where: Bash tool
Versions: 2.1.290 to 2.1.322. Still reported on the newest version, 2.1.322.
Platforms: macOS
How bad: Breaks a normal workflow.

Not quite your bug?

Grep shim misses ^ in groups2 people

Original reports2, newest first

Nov 11, 2026[Bash tool] Embedded grep shim silently skips whole files containing any invalid UTF-8 byte (no NUL), which GNU grep searches#109020
Oct 5, 2026Bash tool grep shim: -q/-c/-l and output to /dev/null report no match when stdin has one invalid UTF-8 byte, while printing lines works (macOS, 2.1.290)#99846