Downgrade error message from JavaCompilerScanner to a warning

This is not actually fatal, as Qbs collects dependency information both
from the TreePathScanner API *and* the output files the compilation
process writes to. Instead, downgrade it to a warning and also point
users to the bug report. This fixes a regression from 1.5.x.

Adds an XFAIL'ing autotest.

Task-number: QBS-1069
Change-Id: I30e5f5d0d1554bf5078509768fdad12f20922319
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

1 files changed, 10 insertions, 3 deletions

diff --git a/share/qbs/modules/java/io/qt/qbs/tools/utils/JavaCompilerScanner.java b/share/qbs/modules/java/io/qt/qbs/tools/utils/JavaCompilerScanner.java
index 368f5519e..1be804ee5 100644
--- a/share/qbs/modules/java/io/qt/qbs/tools/utils/JavaCompilerScanner.java
+++ b/share/qbs/modules/java/io/qt/qbs/tools/utils/JavaCompilerScanner.java
@@ -156,11 +156,18 @@ public class JavaCompilerScanner {
             Collections.sort(parsedOutputFilePathsArray);
             ArrayList<String> compilationOutputFilePathsArray = new ArrayList<String>(compilationOutputFilePaths);
             Collections.sort(compilationOutputFilePathsArray);
+            compilationOutputFilePaths.removeAll(parsedOutputFilePaths);
+            ArrayList<String> differenceArray = new ArrayList<String>(compilationOutputFilePaths);
+            Collections.sort(differenceArray);
 
-            throw new RuntimeException("The set of output files determined by source code parsing:\n\n"
+            System.err.println("The set of output files determined by source code parsing:\n\n"
                     + join("\n", parsedOutputFilePathsArray) + "\n\n"
-                    + "is missing some files that would be produced by the compiler:\n\n"
-                    + join("\n", compilationOutputFilePathsArray) + "\n");
+                    + "is missing some files from the list that would be produced by the compiler:\n\n"
+                    + join("\n", compilationOutputFilePathsArray) + "\n\n"
+                    + "The missing files are:\n\n"
+                    + join("\n", differenceArray) + "\n\n"
+                    + "Compilation will still continue, though a build error *might* appear later;\n"
+                    + "please check the bug report at https://bugreports.qt.io/browse/QBS-1069\n");
         }
 
         return !parsedOutputFilePaths.isEmpty() ? 0 : 1;