ADDITIONAL SYSTEM INFORMATION :
openSUSE Tumbleweed (Linux)
Java 21.0.7, 24.0.1

A DESCRIPTION OF THE PROBLEM :
When a Java source file is compiled using javac -Xlint:all, it should emit three warnings: two [cast] and one [this-escape]. However, when compiled in modular mode (with --module, --module-source-path), javac omits the [this-escape] warning.


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Create the directory structure:
$ mkdir -p javac-bug/src/test/java/org/foo/bar

2. Create module-info.java in javac-bug/src/test/java/

module test {
}

3. Create TestEscapeWarning.java in javac-bug/src/test/java/org/foo/bar/:

package org.foo.bar;

public class TestEscapeWarning {
        private int v1;
        private int v2;

        public TestEscapeWarning(int v1, int v2) {
                this.v1 = (int)v1; // to issue a [cast] warning
                this.v2 = (int)v2; // to issue a [cast] warning

                if (foo(v1,v2) > 0) { // to issue a [this-escape] warning
                }
        }

        protected int foo(int x, int y) {
          return x-y;
        }
}

4.Change directory:

$ cd javac-bug

5. Compile in classic (non-modular) mode (will emit 3 warnings) :

$ javac -d build -classpath . -g:none -Xlint:all src/test/java/org/foo/bar/TestEscapeWarning.java
src/test/java/org/foo/bar/TestEscapeWarning.java:8: warning: [cast] redundant cast to int
                this.v1 = (int)v1; // to issue a [cast] warning
                          ^
src/test/java/org/foo/bar/TestEscapeWarning.java:9: warning: [cast] redundant cast to int
                this.v2 = (int)v2; // to issue a [cast] warning
                          ^
src/test/java/org/foo/bar/TestEscapeWarning.java:11: warning: [this-escape] possible 'this' escape before subclass is fully initialized
                if (foo(v1,v2) > 0) { // to issue a [this-escape] warning
                       ^
3 warnings

6. Compile in modular mode (will emit 2 warnings):

$ javac -d build -classpath . -g:none --module=test -Xlint:all --module-source-path "src/*/java/" --module=test
src/test/java/org/foo/bar/TestEscapeWarning.java:8: warning: [cast] redundant cast to int
                this.v1 = (int)v1; // to issue a [cast] warning
                          ^
src/test/java/org/foo/bar/TestEscapeWarning.java:9: warning: [cast] redundant cast to int
                this.v2 = (int)v2; // to issue a [cast] warning
                          ^
2 warnings


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
All three warnings (2 × [cast], 1 × [this-escape]) should be emitted in both classic and modular compilation modes.
ACTUAL -
In modular compilation mode, the [this-escape] warning is not emitted.

---------- BEGIN SOURCE ----------
Included inline in “Steps to Reproduce.”
---------- END SOURCE ----------