diff --git a/src/tools/clangbackend/ipcsource/clangcompletecodejob.cpp b/src/tools/clangbackend/ipcsource/clangcompletecodejob.cpp
index 2b767604121..433923b3387 100644
--- a/src/tools/clangbackend/ipcsource/clangcompletecodejob.cpp
+++ b/src/tools/clangbackend/ipcsource/clangcompletecodejob.cpp
@@ -57,28 +57,21 @@ IAsyncJob::AsyncPrepareResult CompleteCodeJob::prepareAsyncRun()
 {
     const JobRequest jobRequest = context().jobRequest;
     QTC_ASSERT(jobRequest.type == JobRequest::Type::CompleteCode, return AsyncPrepareResult());
+    QTC_ASSERT(acquireDocument(), return AsyncPrepareResult());
 
-    try {
-        m_pinnedDocument = context().documentForJobRequest();
+    const TranslationUnit translationUnit = *m_translationUnit;
+    const UnsavedFiles unsavedFiles = *context().unsavedFiles;
+    const quint32 line = jobRequest.line;
+    const quint32 column = jobRequest.column;
+    const qint32 funcNameStartLine = jobRequest.funcNameStartLine;
+    const qint32 funcNameStartColumn = jobRequest.funcNameStartColumn;
+    setRunner([translationUnit, unsavedFiles, line, column,
+              funcNameStartLine, funcNameStartColumn]() {
+        return runAsyncHelper(translationUnit, unsavedFiles, line, column,
+                              funcNameStartLine, funcNameStartColumn);
+    });
 
-        const TranslationUnit translationUnit
-                = m_pinnedDocument.translationUnit(jobRequest.preferredTranslationUnit);
-        const UnsavedFiles unsavedFiles = *context().unsavedFiles;
-        const quint32 line = jobRequest.line;
-        const quint32 column = jobRequest.column;
-        const qint32 funcNameStartLine = jobRequest.funcNameStartLine;
-        const qint32 funcNameStartColumn = jobRequest.funcNameStartColumn;
-        setRunner([translationUnit, unsavedFiles, line, column,
-                  funcNameStartLine, funcNameStartColumn]() {
-            return runAsyncHelper(translationUnit, unsavedFiles, line, column,
-                                  funcNameStartLine, funcNameStartColumn);
-        });
-        return AsyncPrepareResult{translationUnit.id()};
-
-    } catch (const std::exception &exception) {
-        qWarning() << "Error in CompleteCodeJob::prepareAsyncRun:" << exception.what();
-        return AsyncPrepareResult();
-    }
+    return AsyncPrepareResult{translationUnit.id()};
 }
 
 void CompleteCodeJob::finalizeAsyncRun()
diff --git a/src/tools/clangbackend/ipcsource/clangcreateinitialdocumentpreamblejob.cpp b/src/tools/clangbackend/ipcsource/clangcreateinitialdocumentpreamblejob.cpp
index 62ae318f61d..2d623e25187 100644
--- a/src/tools/clangbackend/ipcsource/clangcreateinitialdocumentpreamblejob.cpp
+++ b/src/tools/clangbackend/ipcsource/clangcreateinitialdocumentpreamblejob.cpp
@@ -43,24 +43,15 @@ IAsyncJob::AsyncPrepareResult CreateInitialDocumentPreambleJob::prepareAsyncRun(
 {
     const JobRequest jobRequest = context().jobRequest;
     QTC_ASSERT(jobRequest.type == JobRequest::Type::CreateInitialDocumentPreamble, return AsyncPrepareResult());
+    QTC_ASSERT(acquireDocument(), return AsyncPrepareResult());
 
-    try {
-        m_pinnedDocument = context().documentForJobRequest();
-        m_pinnedFileContainer = m_pinnedDocument.fileContainer();
+    const TranslationUnit translationUnit = *m_translationUnit;
+    const TranslationUnitUpdateInput updateInput = m_pinnedDocument.createUpdateInput();
+    setRunner([translationUnit, updateInput]() {
+        return runAsyncHelper(translationUnit, updateInput);
+    });
 
-        const TranslationUnit translationUnit
-                = m_pinnedDocument.translationUnit(jobRequest.preferredTranslationUnit);
-        const TranslationUnitUpdateInput updateInput = m_pinnedDocument.createUpdateInput();
-        setRunner([translationUnit, updateInput]() {
-            return runAsyncHelper(translationUnit, updateInput);
-        });
-        return AsyncPrepareResult{translationUnit.id()};
-
-    } catch (const std::exception &exception) {
-        qWarning() << "Error in CreateInitialDocumentPreambleJob::prepareAsyncRun:"
-                   << exception.what();
-        return AsyncPrepareResult();
-    }
+    return AsyncPrepareResult{translationUnit.id()};
 }
 
 void CreateInitialDocumentPreambleJob::finalizeAsyncRun()
diff --git a/src/tools/clangbackend/ipcsource/clangdocumentjob.h b/src/tools/clangbackend/ipcsource/clangdocumentjob.h
index caa2eb6f0f5..7808286ce0b 100644
--- a/src/tools/clangbackend/ipcsource/clangdocumentjob.h
+++ b/src/tools/clangbackend/ipcsource/clangdocumentjob.h
@@ -30,14 +30,35 @@
 
 #include <clangsupport/filecontainer.h>
 
+#include <memory>
+
 namespace ClangBackEnd {
 
 template<class Result>
 class DocumentJob : public AsyncJob<Result>
 {
+protected:
+    bool acquireDocument()
+    {
+        try {
+            m_pinnedDocument = IAsyncJob::context().documentForJobRequest();
+            m_pinnedFileContainer = m_pinnedDocument.fileContainer();
+
+            const PreferredTranslationUnit preferredTranslationUnit
+                = IAsyncJob::context().jobRequest.preferredTranslationUnit;
+            m_translationUnit.reset(
+                new TranslationUnit(m_pinnedDocument.translationUnit(preferredTranslationUnit)));
+            return true;
+        } catch (const std::exception &) {
+            return false;
+        }
+    }
+
 protected:
     Document m_pinnedDocument;
     FileContainer m_pinnedFileContainer;
+
+    std::unique_ptr<TranslationUnit> m_translationUnit;
 };
 
 } // namespace ClangBackEnd
diff --git a/src/tools/clangbackend/ipcsource/clangfollowsymboljob.cpp b/src/tools/clangbackend/ipcsource/clangfollowsymboljob.cpp
index 2a04be1b0e7..c93b83d6480 100644
--- a/src/tools/clangbackend/ipcsource/clangfollowsymboljob.cpp
+++ b/src/tools/clangbackend/ipcsource/clangfollowsymboljob.cpp
@@ -51,32 +51,23 @@ IAsyncJob::AsyncPrepareResult FollowSymbolJob::prepareAsyncRun()
                return AsyncPrepareResult());
     // Is too slow because of IPC timings, no implementation for now
     QTC_ASSERT(jobRequest.resolveTarget, return AsyncPrepareResult());
+    QTC_ASSERT(acquireDocument(), return AsyncPrepareResult());
 
-    try {
-        m_pinnedDocument = context().documentForJobRequest();
-        m_pinnedFileContainer = m_pinnedDocument.fileContainer();
+    const TranslationUnit translationUnit = *m_translationUnit;
+    const TranslationUnitUpdateInput updateInput = m_pinnedDocument.createUpdateInput();
+    const CommandLineArguments currentArgs(updateInput.filePath.constData(),
+                                           updateInput.projectArguments,
+                                           updateInput.fileArguments,
+                                           false);
 
-        const TranslationUnit translationUnit
-                = m_pinnedDocument.translationUnit(jobRequest.preferredTranslationUnit);
+    const quint32 line = jobRequest.line;
+    const quint32 column = jobRequest.column;
+    const QVector<Utf8String> &dependentFiles = jobRequest.dependentFiles;
+    setRunner([translationUnit, line, column, dependentFiles, currentArgs]() {
+        return runAsyncHelperFollow(translationUnit, line, column, dependentFiles, currentArgs);
+    });
 
-        const TranslationUnitUpdateInput updateInput = m_pinnedDocument.createUpdateInput();
-        const CommandLineArguments currentArgs(updateInput.filePath.constData(),
-                                               updateInput.projectArguments,
-                                               updateInput.fileArguments,
-                                               false);
-
-        const quint32 line = jobRequest.line;
-        const quint32 column = jobRequest.column;
-        const QVector<Utf8String> &dependentFiles = jobRequest.dependentFiles;
-        setRunner([translationUnit, line, column, dependentFiles, currentArgs]() {
-            return runAsyncHelperFollow(translationUnit, line, column, dependentFiles, currentArgs);
-        });
-        return AsyncPrepareResult{translationUnit.id()};
-
-    } catch (const std::exception &exception) {
-        qWarning() << "Error in FollowSymbolJob::prepareAsyncRun:" << exception.what();
-        return AsyncPrepareResult();
-    }
+    return AsyncPrepareResult{translationUnit.id()};
 }
 
 void FollowSymbolJob::finalizeAsyncRun()
diff --git a/src/tools/clangbackend/ipcsource/clangparsesupportivetranslationunitjob.cpp b/src/tools/clangbackend/ipcsource/clangparsesupportivetranslationunitjob.cpp
index c7646f5834b..02cf524da49 100644
--- a/src/tools/clangbackend/ipcsource/clangparsesupportivetranslationunitjob.cpp
+++ b/src/tools/clangbackend/ipcsource/clangparsesupportivetranslationunitjob.cpp
@@ -50,24 +50,15 @@ IAsyncJob::AsyncPrepareResult ParseSupportiveTranslationUnitJob::prepareAsyncRun
 {
     const JobRequest jobRequest = context().jobRequest;
     QTC_ASSERT(jobRequest.type == JobRequest::Type::ParseSupportiveTranslationUnit, return AsyncPrepareResult());
+    QTC_ASSERT(acquireDocument(), return AsyncPrepareResult());
 
-    try {
-        m_pinnedDocument = context().documentForJobRequest();
-        m_pinnedFileContainer = m_pinnedDocument.fileContainer();
+    const TranslationUnit translationUnit = *m_translationUnit;
+    const TranslationUnitUpdateInput updateInput = m_pinnedDocument.createUpdateInput();
+    setRunner([translationUnit, updateInput]() {
+        return runAsyncHelper(translationUnit, updateInput);
+    });
 
-        const TranslationUnit translationUnit
-                = m_pinnedDocument.translationUnit(jobRequest.preferredTranslationUnit);
-        const TranslationUnitUpdateInput updateInput = m_pinnedDocument.createUpdateInput();
-        setRunner([translationUnit, updateInput]() {
-            return runAsyncHelper(translationUnit, updateInput);
-        });
-        return AsyncPrepareResult{translationUnit.id()};
-
-    } catch (const std::exception &exception) {
-        qWarning() << "Error in ParseForSupportiveTranslationUnitJob::prepareAsyncRun:"
-                   << exception.what();
-        return AsyncPrepareResult();
-    }
+    return AsyncPrepareResult{translationUnit.id()};
 }
 
 void ParseSupportiveTranslationUnitJob::finalizeAsyncRun()
diff --git a/src/tools/clangbackend/ipcsource/clangreparsesupportivetranslationunitjob.cpp b/src/tools/clangbackend/ipcsource/clangreparsesupportivetranslationunitjob.cpp
index 833b8fe2b9d..680693514b9 100644
--- a/src/tools/clangbackend/ipcsource/clangreparsesupportivetranslationunitjob.cpp
+++ b/src/tools/clangbackend/ipcsource/clangreparsesupportivetranslationunitjob.cpp
@@ -50,24 +50,15 @@ IAsyncJob::AsyncPrepareResult ReparseSupportiveTranslationUnitJob::prepareAsyncR
 {
     const JobRequest jobRequest = context().jobRequest;
     QTC_ASSERT(jobRequest.type == JobRequest::Type::ReparseSupportiveTranslationUnit, return AsyncPrepareResult());
+    QTC_ASSERT(acquireDocument(), return AsyncPrepareResult());
 
-    try {
-        m_pinnedDocument = context().documentForJobRequest();
-        m_pinnedFileContainer = m_pinnedDocument.fileContainer();
+    const TranslationUnit translationUnit = *m_translationUnit;
+    const TranslationUnitUpdateInput updateInput = m_pinnedDocument.createUpdateInput();
+    setRunner([translationUnit, updateInput]() {
+        return runAsyncHelper(translationUnit, updateInput);
+    });
 
-        const TranslationUnit translationUnit
-                = m_pinnedDocument.translationUnit(jobRequest.preferredTranslationUnit);
-        const TranslationUnitUpdateInput updateInput = m_pinnedDocument.createUpdateInput();
-        setRunner([translationUnit, updateInput]() {
-            return runAsyncHelper(translationUnit, updateInput);
-        });
-        return AsyncPrepareResult{translationUnit.id()};
-
-    } catch (const std::exception &exception) {
-        qWarning() << "Error in ReparseSupportiveTranslationUnitJob::prepareAsyncRun:"
-                   << exception.what();
-        return AsyncPrepareResult();
-    }
+    return AsyncPrepareResult{translationUnit.id()};
 }
 
 void ReparseSupportiveTranslationUnitJob::finalizeAsyncRun()
diff --git a/src/tools/clangbackend/ipcsource/clangrequestdocumentannotationsjob.cpp b/src/tools/clangbackend/ipcsource/clangrequestdocumentannotationsjob.cpp
index f0f7f78210c..6f8e3eecb3f 100644
--- a/src/tools/clangbackend/ipcsource/clangrequestdocumentannotationsjob.cpp
+++ b/src/tools/clangbackend/ipcsource/clangrequestdocumentannotationsjob.cpp
@@ -53,22 +53,14 @@ IAsyncJob::AsyncPrepareResult RequestDocumentAnnotationsJob::prepareAsyncRun()
     const JobRequest jobRequest = context().jobRequest;
     QTC_ASSERT(jobRequest.type == JobRequest::Type::RequestDocumentAnnotations,
                return AsyncPrepareResult());
+    QTC_ASSERT(acquireDocument(), return AsyncPrepareResult());
 
-    try {
-        m_pinnedDocument = context().documentForJobRequest();
-        m_pinnedFileContainer = m_pinnedDocument.fileContainer();
+    const TranslationUnit translationUnit = *m_translationUnit;
+    setRunner([translationUnit]() {
+        return runAsyncHelper(translationUnit);
+    });
 
-        const TranslationUnit translationUnit
-                = m_pinnedDocument.translationUnit(jobRequest.preferredTranslationUnit);
-        setRunner([translationUnit]() {
-            return runAsyncHelper(translationUnit);
-        });
-        return AsyncPrepareResult{translationUnit.id()};
-
-    } catch (const std::exception &exception) {
-        qWarning() << "Error in RequestDocumentAnnotationsJob::prepareAsyncRun:" << exception.what();
-        return AsyncPrepareResult();
-    }
+    return AsyncPrepareResult{translationUnit.id()};
 }
 
 void RequestDocumentAnnotationsJob::finalizeAsyncRun()
diff --git a/src/tools/clangbackend/ipcsource/clangrequestreferencesjob.cpp b/src/tools/clangbackend/ipcsource/clangrequestreferencesjob.cpp
index 1ebc22c9713..b7e60aa19db 100644
--- a/src/tools/clangbackend/ipcsource/clangrequestreferencesjob.cpp
+++ b/src/tools/clangbackend/ipcsource/clangrequestreferencesjob.cpp
@@ -47,24 +47,16 @@ IAsyncJob::AsyncPrepareResult RequestReferencesJob::prepareAsyncRun()
     const JobRequest jobRequest = context().jobRequest;
     QTC_ASSERT(jobRequest.type == JobRequest::Type::RequestReferences,
                return AsyncPrepareResult());
+    QTC_ASSERT(acquireDocument(), return AsyncPrepareResult());
 
-    try {
-        m_pinnedDocument = context().documentForJobRequest();
-        m_pinnedFileContainer = m_pinnedDocument.fileContainer();
+    const TranslationUnit translationUnit = *m_translationUnit;
+    const quint32 line = jobRequest.line;
+    const quint32 column = jobRequest.column;
+    setRunner([translationUnit, line, column]() {
+        return runAsyncHelper(translationUnit, line, column);
+    });
 
-        const TranslationUnit translationUnit
-                = m_pinnedDocument.translationUnit(jobRequest.preferredTranslationUnit);
-        const quint32 line = jobRequest.line;
-        const quint32 column = jobRequest.column;
-        setRunner([translationUnit, line, column]() {
-            return runAsyncHelper(translationUnit, line, column);
-        });
-        return AsyncPrepareResult{translationUnit.id()};
-
-    } catch (const std::exception &exception) {
-        qWarning() << "Error in RequestReferencesJob::prepareAsyncRun:" << exception.what();
-        return AsyncPrepareResult();
-    }
+    return AsyncPrepareResult{translationUnit.id()};
 }
 
 void RequestReferencesJob::finalizeAsyncRun()
diff --git a/src/tools/clangbackend/ipcsource/clangsuspenddocumentjob.cpp b/src/tools/clangbackend/ipcsource/clangsuspenddocumentjob.cpp
index 0e71813ba20..27b204cc77f 100644
--- a/src/tools/clangbackend/ipcsource/clangsuspenddocumentjob.cpp
+++ b/src/tools/clangbackend/ipcsource/clangsuspenddocumentjob.cpp
@@ -42,22 +42,14 @@ IAsyncJob::AsyncPrepareResult SuspendDocumentJob::prepareAsyncRun()
 {
     const JobRequest jobRequest = context().jobRequest;
     QTC_ASSERT(jobRequest.type == JobRequest::Type::SuspendDocument, return AsyncPrepareResult());
+    QTC_ASSERT(acquireDocument(), return AsyncPrepareResult());
 
-    try {
-        m_pinnedDocument = context().documentForJobRequest();
-        m_pinnedFileContainer = m_pinnedDocument.fileContainer();
+    TranslationUnit translationUnit = *m_translationUnit;
+    setRunner([translationUnit]() {
+        return runAsyncHelper(translationUnit);
+    });
 
-        TranslationUnit translationUnit
-                = m_pinnedDocument.translationUnit(jobRequest.preferredTranslationUnit);
-        setRunner([translationUnit]() {
-            return runAsyncHelper(translationUnit);
-        });
-        return AsyncPrepareResult{translationUnit.id()};
-
-    } catch (const std::exception &exception) {
-        qWarning() << "Error in SuspendDocumentJob::prepareAsyncRun:" << exception.what();
-        return AsyncPrepareResult();
-    }
+    return AsyncPrepareResult{translationUnit.id()};
 }
 
 void SuspendDocumentJob::finalizeAsyncRun()
diff --git a/src/tools/clangbackend/ipcsource/clangupdatedocumentannotationsjob.cpp b/src/tools/clangbackend/ipcsource/clangupdatedocumentannotationsjob.cpp
index 3698d1c40c8..835377f73ac 100644
--- a/src/tools/clangbackend/ipcsource/clangupdatedocumentannotationsjob.cpp
+++ b/src/tools/clangbackend/ipcsource/clangupdatedocumentannotationsjob.cpp
@@ -57,23 +57,15 @@ IAsyncJob::AsyncPrepareResult UpdateDocumentAnnotationsJob::prepareAsyncRun()
 {
     const JobRequest jobRequest = context().jobRequest;
     QTC_ASSERT(isExpectedJobRequestType(jobRequest), return AsyncPrepareResult());
+    QTC_ASSERT(acquireDocument(), return AsyncPrepareResult());
 
-    try {
-        m_pinnedDocument = context().documentForJobRequest();
-        m_pinnedFileContainer = m_pinnedDocument.fileContainer();
+    const TranslationUnit translationUnit = *m_translationUnit;
+    const TranslationUnitUpdateInput updateInput = createUpdateInput(m_pinnedDocument);
+    setRunner([translationUnit, updateInput]() {
+        return runAsyncHelper(translationUnit, updateInput);
+    });
 
-        const TranslationUnit translationUnit
-                = m_pinnedDocument.translationUnit(jobRequest.preferredTranslationUnit);
-        const TranslationUnitUpdateInput updateInput = createUpdateInput(m_pinnedDocument);
-        setRunner([translationUnit, updateInput]() {
-            return runAsyncHelper(translationUnit, updateInput);
-        });
-        return AsyncPrepareResult{translationUnit.id()};
-
-    } catch (const std::exception &exception) {
-        qWarning() << "Error in UpdateDocumentAnnotationsJob::prepareAsyncRun:" << exception.what();
-        return AsyncPrepareResult();
-    }
+    return AsyncPrepareResult{translationUnit.id()};
 }
 
 void UpdateDocumentAnnotationsJob::finalizeAsyncRun()