fix/double src resolutions

[jurgenvinju]

The final bootstrap of removing Tree@\loc led to these errors while checking the final compilation of the compiler:

These errors are from the log https://github.com/usethesource/rascal-core-big-tests/actions/runs/25805901058 and not consecutively:

[ERROR] src/org/rascalmpl/library/lang/rascal/tests/basic/Functions.rsc:0304:017: Argument 0 should have type `&S(&U)(int(int,int),&T)`, found `&S(&U)(&S(&T,&U),&T)`
[ERROR] src/org/rascalmpl/compiler/lang/rascalcore/compile/Rascal2muRascal/RascalExpression.rsc:0142:056: Base expression of field selection is ambiguous and should be resolved
[ERROR] src/org/rascalmpl/compiler/lang/rascalcore/compile/Rascal2muRascal/RascalExpression.rsc:0147:056: Base expression of field selection is ambiguous and should be resolved
[ERROR] src/org/rascalmpl/compiler/lang/rascalcore/compile/Rascal2muRascal/RascalExpression.rsc:1160:118: Base expression of field selection is ambiguous and should be resolved

We focus first on the last three issues where:

• we see that someBase.someField.src is now leading to the "Base expression of field selection is ambiguous and should be resolved" error,
• where before the <base>.someField@\loc did not.
• We don't know yet if someBase.someField is the base we are talking about in this error message, or just someBase.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 46%. Comparing base (940999f) to head (51f8bd8).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##              main   #2772   +/-   ##
=======================================
  Coverage       46%     46%           
+ Complexity    6722    6718    -4     
=======================================
  Files          794     794           
  Lines        65936   65936           
  Branches      9888    9888           
=======================================
+ Hits         30764   30766    +2     
+ Misses       32792   32789    -3     
- Partials      2380    2381    +1     

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[jurgenvinju]

Running this PR with causes for the double declarations, since a small test did not reproduce the issue: https://github.com/usethesource/rascal-core-big-tests/actions/runs/25914305318

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud