@@ -3399,11 +3399,16 @@ package body Errout is
if Warning_Mode = Treat_As_Error then
declare
- Compile_Time_Pragma_Warnings : constant Int :=
+ Compile_Time_Pragma_Warnings : constant Nat :=
Count_Compile_Time_Pragma_Warnings;
- begin
- Total_Errors_Detected := Total_Errors_Detected + Warnings_Detected
+ Total : constant Int := Total_Errors_Detected + Warnings_Detected
- Warning_Info_Messages - Compile_Time_Pragma_Warnings;
+ -- We need to protect against a negative Total here, because
+ -- if a pragma Compile_Time_Warning occurs in dead code, it
+ -- gets counted in Compile_Time_Pragma_Warnings but not in
+ -- Warnings_Detected.
+ begin
+ Total_Errors_Detected := Int'Max (Total, 0);
Warnings_Detected :=
Warning_Info_Messages + Compile_Time_Pragma_Warnings;
end;
From: Bob Duff <duff@adacore.com> If a pragma Compile_Time_Warning triggers, and the pragma is later removed because it is dead code, then the compiler can return a bad exit code. This causes gprbuild to report "*** compilation phase failed". This is because Total_Errors_Detected, which is declared as Nat, goes negative, causing Constraint_Error. In assertions-off mode, the Constraint_Error is not detected, but the compiler nonetheless reports a bad exit code. This patch prevents that negative count. gcc/ada/ * errout.adb (Output_Messages): Protect against the total going negative. Tested on x86_64-pc-linux-gnu, committed on master. --- gcc/ada/errout.adb | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-)