https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102442
Bug ID: 102442 Summary: Incorrect debug info for C89-style function parameter Product: gcc Version: 11.1.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: debug Assignee: unassigned at gcc dot gnu.org Reporter: liyd2021 at gmail dot com Target Milestone: --- Affected versions: gcc 11.1.0 with gdb (Ubuntu 20.04.2) (terminal) $ cat simple.c && gcc -g -Og simple.c #include <assert.h> // float fx(float x) float fx(x) float x; { return x + 1.0; } float inita() { return 3.0; } int main() { float a = inita(); assert(fx(a) == 4.0); } -------------------- (terminal) $ cat run.gdb b fx r (terminal) $ gdb -x run.gdb a.out Breakpoint 1, fx (x=0) at simple.c:5 <- **BUG** <- x should be 3.0