fix error() not propagating through if()

if() would simply "downgrade" a fatal error to a false condition, which
is certainly not expected.

Change-Id: Ie9c54f2bddf588856498bf795007b341b7c9363a
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
(cherry picked from qtbase/b27d4835c2ae0d8767ca914acb72a4bdcea6fc85)
Reviewed-by: Jake Petroules <jake.petroules@qt.io>

3 files changed, 8 insertions, 7 deletions

diff --git a/src/linguist/shared/qmakebuiltins.cpp b/src/linguist/shared/qmakebuiltins.cpp
index 9b83c7bff..35fa64138 100644
--- a/src/linguist/shared/qmakebuiltins.cpp
+++ b/src/linguist/shared/qmakebuiltins.cpp
@@ -1223,8 +1223,8 @@ QMakeEvaluator::VisitReturn QMakeEvaluator::evaluateBuiltinConditional(
             evalError(fL1S("if(condition) requires one argument."));
             return ReturnFalse;
         }
-        return returnBool(evaluateConditional(args.at(0).toQString(),
-                                              m_current.pro->fileName(), m_current.line));
+        return evaluateConditional(args.at(0).toQString(),
+                                   m_current.pro->fileName(), m_current.line);
     }
     case T_CONFIG: {
         if (args.count() < 1 || args.count() > 2) {
diff --git a/src/linguist/shared/qmakeevaluator.cpp b/src/linguist/shared/qmakeevaluator.cpp
index 8f1bdebb7..9334bf021 100644
--- a/src/linguist/shared/qmakeevaluator.cpp
+++ b/src/linguist/shared/qmakeevaluator.cpp
@@ -1758,13 +1758,14 @@ ProStringList QMakeEvaluator::evaluateExpandFunction(
     return ProStringList();
 }
 
-bool QMakeEvaluator::evaluateConditional(const QString &cond, const QString &where, int line)
+QMakeEvaluator::VisitReturn QMakeEvaluator::evaluateConditional(
+        const QString &cond, const QString &where, int line)
 {
-    bool ret = false;
+    VisitReturn ret = ReturnFalse;
     ProFile *pro = m_parser->parsedProBlock(cond, where, line, QMakeParser::TestGrammar);
     if (pro->isOk()) {
         m_locationStack.push(m_current);
-        ret = visitProBlock(pro, pro->tokPtr()) == ReturnTrue;
+        ret = visitProBlock(pro, pro->tokPtr());
         m_current = m_locationStack.pop();
     }
     pro->deref();
@@ -1776,7 +1777,7 @@ void QMakeEvaluator::checkRequirements(const ProStringList &deps)
 {
     ProStringList &failed = valuesRef(ProKey("QMAKE_FAILED_REQUIREMENTS"));
     foreach (const ProString &dep, deps)
-        if (!evaluateConditional(dep.toQString(), m_current.pro->fileName(), m_current.line))
+        if (evaluateConditional(dep.toQString(), m_current.pro->fileName(), m_current.line) != ReturnTrue)
             failed << dep;
 }
 #endif
diff --git a/src/linguist/shared/qmakeevaluator.h b/src/linguist/shared/qmakeevaluator.h
index 991cda01a..a115165b6 100644
--- a/src/linguist/shared/qmakeevaluator.h
+++ b/src/linguist/shared/qmakeevaluator.h
@@ -220,7 +220,7 @@ public:
     ProStringList evaluateBuiltinExpand(int func_t, const ProKey &function, const ProStringList &args);
     VisitReturn evaluateBuiltinConditional(int func_t, const ProKey &function, const ProStringList &args);
 
-    bool evaluateConditional(const QString &cond, const QString &where, int line = -1);
+    VisitReturn evaluateConditional(const QString &cond, const QString &where, int line = -1);
 #ifdef PROEVALUATOR_FULL
     void checkRequirements(const ProStringList &deps);
 #endif