[GNATS 25962] Assertion failure on invalid diag_suppress pragma #19

Description

​#pragma diagnostic push
​#pragma diag_suppress
​int get_free_no_warn()
​{
​ // warnings for uninitialized variable off
​ int a;
​ return a;
​ // warnings for uninitialized variable on
​}
​#pragma diagnostic pop
​
​int get_free_warn()
​{
​ int a;
​ return a;
​}
​
​:!$XCFE test.cpp
​"test.cpp", line 2: warning: expected an error number or error tag
​ #pragma diag_suppress
​ ^
​
​"test.cpp", line 2: warning: expected a ","
​ #pragma diag_suppress
​ ^
​
​"test.cpp", line 2: internal error: assertion failed at: "pragma.c", line 1192
​ in process_immediate_pragmas
​
​ #pragma diag_suppress
​ ^
​
​1 catastrophic error detected in the compilation of "test.cpp".
​Compilation aborted.