SIGFPE (Signal 8): Meaning, Exit Code 136 & Fix
SIGFPE is Unix signal 8. A process terminated by it reports exit code 136 (128 + 8).
SIGFPE is raised on a fatal arithmetic error, most often integer division by zero. When it kills a process, the shell reports exit code 136 - the 128 + signal-number convention.
What it means
A deterministic arithmetic bug - integer divide-by-zero or overflow with traps enabled.
When it happens in CI
- Integer division by zero.
- Integer overflow with
-ftrapv.
How to handle it
This reproduces every time - it is a code bug. Guard the divisor/operation and add a regression test.
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