Caused by: java.lang.VerifyError: Operand stack overflow

[ivorobioff4grada]

I get the following error for no reason when starting my Boot Spring project. Before updating to version v1.21.0 (that is, v1.20.0) everything worked well.

Environment

• Operating System: Windows 11 (WSL)
• JDK version: /.vscode-server/extensions/redhat.java-1.21.0-linux-x64/jre/17.0.7-linux-x86_64/bin/java
• Visual Studio Code version: 1.80.1
• Java extension version: v1.21.1
• Spring Boot: v2.6.4

Here's the complete error:

Caused by: java.lang.VerifyError: Operand stack overflow
Exception Details:
  Location:
    com/xxx/xxx/services/URIService.getValue(Ljava/util/Iterator;)Ljava/lang/String; @39: ldc
  Reason:
    Exceeded max stack size.
  Current Frame:
    bci: @39
    flags: { }
    locals: { 'com/xxx/xxx/services/URIService', 'java/util/Iterator', 'java/lang/String' }
    stack: { 'java/lang/String', 'java/lang/String' }
  Bytecode:
    0000000: 2bb9 007c 0100 9900 3d2b b900 7401 00c0
    0000010: 007a 4d2c ba00 de00 00b6 00e1 9900 0801
    0000020: 4da7 0024 2c12 e512 e7b6 00e9 b200 edb6
    0000030: 00f3 b800 f812 e712 fdb6 00e9 b600 a54d
    0000040: a700 0501 4d2c b0                      
  Stackmap Table:
    append_frame(@36,Object[#122])
    chop_frame(@67,1)
    append_frame(@69,Object[#122])

        at java.base/java.lang.Class.getDeclaredMethods0(Native Method) ~[na:na]
        at java.base/java.lang.Class.privateGetDeclaredMethods(Unknown Source) ~[na:na]
        at java.base/java.lang.Class.getDeclaredMethods(Unknown Source) ~[na:na]
        at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:467) ~[spring-core-5.3.16.jar:5.3.16]
        ... 158 common frames omitted

An interesting fact, here's the code causing that error:

private String getValue(final Iterator<String> it) throws UnsupportedEncodingException {
        String value;
        if (it.hasNext()) {
            value = it.next();
            if (value.equalsIgnoreCase("" + null)) {
                value = null;
            } else {
                value = URLDecoder
                        .decode(value.replaceAll("\\+", "%2B"), StandardCharsets.UTF_8.name())
                        .replaceAll("%2B", "+")
                        .trim();
            }
        } else {
            value = null;
        }
        return value;
    }

if I remove or replace invocation of replaceAll everything works well. So, it has something to do with regex pattern!

Thanks!

[snjeza]

This is an upstream Eclipse issue.
See

• eclipse-jdt/eclipse.jdt.core@be45d8f
• Bug 527899 [9] Implement JEP 280: Indify String Concatenation eclipse-jdt/eclipse.jdt.core#1139
• [regression] java.lang.VerifyError: Operand stack overflow eclipse-jdt/eclipse.jdt.core#1256

@ivorobioff4grada you can try to set

org.eclipse.jdt.core.compiler.codegen.useStringConcatFactory = disabled

to <your_project>/.settings/org.eclipse.jdt.core.prefs

[ivorobioff4grada]

@snjeza thanks, it worked out