From: Etienne Servais <servais@adacore.com>
Date: Tue, 26 Oct 2021 15:00:24 +0000 (+0200)
Subject: [Ada] Initialize Compiler_State to avoid Constraint_Error
X-Git-Tag: basepoints/gcc-14~6677
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=83bfddac6feff4dcacc2b93e2357629a3bfa971b;p=thirdparty%2Fgcc.git

[Ada] Initialize Compiler_State to avoid Constraint_Error

When building gnat1 with `-gnatVa` as we do locally, rules like: `gcc -c
-gnatyM79 <any adb file with lines longer than 79>` will throw a
constraint error as `lib.compiler_state` is initialized by par.adb, ie
after scanning. Therefore any error_msg thrown during scanning will
perform this uninitialized read (which raises a Constraint_Error when
the compiler was compiled with `-gnatVa`).

Initialize this flag to `Parsing`.

gcc/ada/

	* lib.ads: initialize `Compiler_State` to `Parsing`.
---

diff --git a/gcc/ada/lib.ads b/gcc/ada/lib.ads
index 4a799130a4b..e29d42af570 100644
--- a/gcc/ada/lib.ads
+++ b/gcc/ada/lib.ads
@@ -39,7 +39,7 @@ package Lib is
    --  Type to hold list of indirect references to unit number table
 
    type Compiler_State_Type is (Parsing, Analyzing);
-   Compiler_State : Compiler_State_Type;
+   Compiler_State : Compiler_State_Type := Parsing;
    --  Indicates current state of compilation. This is used to implement the
    --  function In_Extended_Main_Source_Unit.