https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98379
Bug ID: 98379
Summary: Unknown tree: c_maybe_const_expr in a warning
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
The output of the warning below is garbled. The pretty-printer that formats
the type doesn't know how to cope with the representation of the !*a
expression:
$ cat t.c && gcc -O2 -S -Wall t.c
int f (int n, int*, int[n]);
int f (int n, int *a, int[!*a]);
t.c:2:23: warning: argument 3 of type ‘int[(*a) == 0]’ declared with mismatched
bound ‘<<< Unknown tree: c_maybe_const_expr
*a >>> == 0’ [-Wvla-parameter]
2 | int f (int n, int *a, int[!*a]);
| ^~~~~~~~
t.c:1:21: note: previously declared as ‘int[n]’ with bound argument 1
1 | int f (int n, int*, int[n]);
| ~~~~~ ^~~~~~
