UnifiedDiffParserException: expected file start line not found occurred when parse one Git format patch file #84
Description
Describe the bug
UnifiedDiffParserException: expected file start line not found occured when parse one Git format patch file
To Reproduce
Steps to reproduce the behavior:
- Example data
- simple programm snippet
- See error
the git format patch file is here:
From b53e612a2ab5ff15d14860e252f84c0f343fe93a Mon Sep 17 00:00:00 2001
From: nmancus1 <nmancus1
Date: Thu, 4 Jun 2020 11:46:34 -0400
Subject: [PATCH] minor: Add input file for Java14 instanceof with pattern
matching (#7290)
---
config/ant-phase-verify.xml | 2 +
.../InputJava14InstanceofWithPatternMatching.java | 76 ++++++++++++++++++++++
2 files changed, 78 insertions(+)
create mode 100644 src/test/resources-noncompilable/com/puppycrawl/tools/checkstyle/grammar/java14/InputJava14InstanceofWithPatternMatching.java
diff --git a/config/ant-phase-verify.xml b/config/ant-phase-verify.xml
index d27ffef..e0285ce 100644
--- a/config/ant-phase-verify.xml
+++ b/config/ant-phase-verify.xml
@@ -148,6 +148,8 @@
<exclude name="**/InputMainFrameModelIncorrectClass.java"/>
<exclude name="**/InputBeforeExecutionExclusionFileFilterIncorrectClass.java"/>
<exclude name="**/InputJavaParser.java"/>
+ <!-- until https://github.com/checkstyle/checkstyle/issues/7290 -->
+ <exclude name="**/InputJava14InstanceofWithPatternMatching.java"/>
<!-- Cannot parse until Java 14 support -->
<exclude name="**/InputJava14Records.java"/>
</fileset>
diff --git a/src/test/resources-noncompilable/com/puppycrawl/tools/checkstyle/grammar/java14/InputJava14InstanceofWithPatternMatching.java b/src/test/resources-noncompilable/com/puppycrawl/tools/checkstyle/grammar/java14/InputJava14InstanceofWithPatternMatching.java
new file mode 100644
index 0000000..8fa3eba
--- /dev/null
+++ b/src/test/resources-noncompilable/com/puppycrawl/tools/checkstyle/grammar/java14/InputJava14InstanceofWithPatternMatching.java
@@ -0,0 +1,76 @@
+//non-compiled with javac: Compilable with Java14
+package com.puppycrawl.tools.checkstyle.grammar.java14;
+
+import java.util.Arrays;
+import java.util.Locale;
...... I removed it
+ }
+ }
+}
--
2.7.4
when I run the follow codes, the exception happened in UnifiedDiffReader.parseUnifiedDiff
final String fullFileName = getPath(fileName);
final FileInputStream ins = new FileInputStream(fullFileName);
return UnifiedDiffReader.parseUnifiedDiff(ins);error information:
com.github.difflib.unifieddiff.UnifiedDiffParserException: expected file start line not found
at com.github.difflib.unifieddiff.UnifiedDiffReader.parse(UnifiedDiffReader.java:90)
at com.github.difflib.unifieddiff.UnifiedDiffReader.parseUnifiedDiff(UnifiedDiffReader.java:136)
at com.github.checkstyle.patchfilter.SuppressionPatchFilterTest.getUnifiedDiff(SuppressionPatchFilterTest.java:232)
at com.github.checkstyle.patchfilter.SuppressionPatchFilterTest.testGitFormatPatchLinuxTwo(SuppressionPatchFilterTest.java:151)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Expected behavior
A clear and concise description of what you expected to happen.
I hope to parse this file correctly.
System
- Java version 1.8
- Version [e.g. 22]
Maven plugin
<groupId>io.github.java-diff-utils</groupId>
<artifactId>java-diff-utils</artifactId>
<version>4.5</version>