This pattern with preprocessor error repeats several times in the log file, this is the very end of it:
``` 015-define-object-with-parens: PASS 150/151 tests returned correct results --- stderr --- --- +++ @@ -1,2 +1,2 @@ -0:2(8): preprocessor error: syntax error, unexpected end of file +0:2(8): preprocessor error: syntax error, unexpected $end ------- 73/94 mesa:intel / anv_state_pool FAIL 0.42 s (killed by signal 11 SIGSEGV) --- command --- 17:45:12 /tmp/guix-build-mesa-20.0.8.drv-0/build/src/intel/vulkan/state_pool ------- Full log written to /tmp/guix-build-mesa-20.0.8.drv-0/build/meson-logs/testlog.txt FAILED: meson-test /gnu/store/x7yb6fg9d4qv8d2nfqdnlih43y8d6whf-meson-for-build-0.53.2/bin/meson test --no-rebuild --print-errorlogs ninja: build stopped: subcommand failed. command "ninja" "test" failed with status 1 ```