Dear all, I did read: * https://gcc.gnu.org/bugs/minimize.html However I am finding it very hard to reduce a test case. Basically compiling a large c++ codebase with -fvisibility=hidden triggers a segfault. The same c++ code does run properly when compiled with the exact same flag under gcc (Debian 10.2.1-6) 10.2.1 20210110. I've setup a quick c-vise script on a Debian porterbox and it has been running for now ~2hours. Current status is (*). Questions: 1. How long (approx) a c-vise process is supposed to be? 2. Since I've identified the culprit gcc flag, isn't there a better (pragmatic) approach to reducing the test case ? Thanks much in advance -M (*) % cvise --clang-delta-std "c++14" -n 1 /home/malat/reduce-ice.sh RenderModules.cc 00:00:00 INFO ===< 15741 >=== 00:00:00 INFO running 1 interestingness test in parallel 00:00:00 INFO INITIAL PASSES 00:00:00 INFO ===< IncludesPass >=== 00:00:00 INFO (0.1%, 52689 bytes, 1322 lines) 00:00:57 INFO ===< UnIfDefPass >=== 00:00:57 INFO ===< CommentsPass >=== 00:01:06 INFO ===< IfPass >=== 00:01:06 INFO ===< LineMarkersPass >=== 00:01:06 INFO ===< BlankPass >=== 00:01:14 INFO ===< ClangBinarySearchPass::replace-function-def-with-decl >=== 00:07:57 INFO ===< ClangBinarySearchPass::remove-unused-function >=== 00:14:48 INFO ===< LinesPass::0 >===