https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121975
--- Comment #2 from Tobias Burnus <burnus at gcc dot gnu.org> --- If I try reproduce to manually reproduce > FAIL: c-c++-common/goacc-gomp/nesting-1.c -std=c++17 at line 30 (test for > warnings, line 31) I see (a) that there is '*/' missing in the first line. And I see (b) a warning only for line 28 (with '-Wall), which looks odd: c-c++-common/goacc-gomp/nesting-1.c:28:9: warning: ‘i’ is used uninitialized [-Wuninitialized] 28 | int i; | ^ c-c++-common/goacc-gomp/nesting-1.c:28:9: note: ‘i’ was declared here 28 | int i; | ^ 'i' seems to be unused on the host but due to the firstprivate it is read – while inside the region it is assigned a value 'i = 0'. But I have only glanced at it.