Dear all, there was some left-over code - likely from development - that could lead to a compiler segfault when given invalid input. Steve found the offending line. Removing it solves the issue. The fix was acknowledged by Tobias in the PR. Regtested on x86_64-pc-linux-gnu. Pushed as: r13-1767-g26bbe78f77f73bb66af1ac13d0deec888a3c6510 Will backport to 12-branch, as the offending code was introduced there. Thanks, Harald